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use AC_DEFUN, alphabetize manual

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David MacKenzie 1994-08-13 02:19:11 +00:00
parent 4481506790
commit 18c8136a84
8 changed files with 1101 additions and 1048 deletions
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5
NEWS
View File

@ -1,3 +1,7 @@
Thanks to everybody who's submitted changes and additions to Autoconf!
I've incorporated some of them, and am still considering others for
future releases -- but I didn't want to postpone this release indefinitely.
Major changes in release 2.0:
** New files:
@ -11,6 +15,7 @@ Major changes in release 2.0:
** New macros:
* AC_CACHE_VAL to share results of tests between configure runs.
* AC_DEFUN to define macros and automatically AC_PROVIDE them.
* AC_CONFIG_AUX_DIR, AC_CANONICAL_SYSTEM, AC_LINK_FILES to
support deciding unguessable features based on the host and target types.
* AC_CONFIG_SUBDIRS to recursively configure a source tree.

8
README
View File

@ -9,10 +9,10 @@ operating system features that the package can use, in the form of m4
macro calls.
Producing configuration scripts using Autoconf requires GNU m4. You
should install GNU m4 before configuring Autoconf, so that Autoconf's
configure script can find it. The configuration scripts produced by
Autoconf are self-contained, so their users do not need to have
Autoconf (or GNU m4).
should install GNU m4 (version 1.1 or later) before configuring
Autoconf, so that Autoconf's configure script can find it. The
configuration scripts produced by Autoconf are self-contained, so
their users do not need to have Autoconf (or GNU m4).
Also, some optional utilities that come with Autoconf use Perl, Bash,
TCL, and the TCL packages Expect and DejaGNU. However, none of those

282
acgeneral.m4
View File

@ -1,4 +1,5 @@
dnl Parameterized macros that do not check for something specific.
dnl Requires GNU m4.
dnl This file is part of Autoconf.
dnl Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
dnl
@ -34,7 +35,7 @@ Install it before installing Autoconf or set the
M4 environment variable to its path name.
)m4exit(2)])dnl
dnl
define(AC_ACVERSION, 1.98)dnl
define(AC_ACVERSION, 1.99)dnl
dnl This is defined by the --version option of the autoconf script.
ifdef([AC_PRINT_VERSION], [Autoconf version AC_ACVERSION
m4exit(0)])dnl
@ -47,12 +48,19 @@ dnl m4 diversions:
define(AC_DIVERSION_NORMAL, 0)dnl normal output
define(AC_DIVERSION_SED, 1)dnl sed substitutions for config.status
define(AC_DIVERSION_VAR, 2)dnl variable assignments for config.status
define(AC_DIVERSION_HELP_ENABLE, 3)dnl --enable/--disable help strings
define(AC_DIVERSION_ARG_ENABLE, 4)dnl --enable/--disable actions
define(AC_DIVERSION_HELP_WITH, 5)dnl --with/--without help strings
define(AC_DIVERSION_ARG_WITH, 6)dnl --with/--without actions
define(AC_DIVERSION_HELP, 3)dnl --enable/--with help strings
define(AC_DIVERSION_ARG, 4)dnl --enable/--with actions
divert(AC_DIVERSION_NORMAL)dnl
dnl
define(AC_INIT_NOTICE,
dnl Define a macro which automatically provides itself.
dnl Use instead of define for macros to be used as functions.
dnl
dnl AC_DEFUN(NAME, EXPANSION)
define([AC_DEFUN],
[define($1,
[define([AC_PROVIDE_$1], )][$2])])dnl
dnl
AC_DEFUN(AC_INIT_NOTICE,
[# Guess values for system-dependent variables and create Makefiles.
# Generated automatically using autoconf version] AC_ACVERSION [
# Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
@ -72,7 +80,7 @@ define(AC_INIT_NOTICE,
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
])dnl
dnl
define(AC_INIT_PARSEARGS,
AC_DEFUN(AC_INIT_PARSEARGS,
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
# Save the original args to write them into config.status later.
@ -105,10 +113,8 @@ Features and packages:
--x-includes=DIR X include files are in DIR
--x-libraries=DIR X library files are in DIR
--enable/--disable options recognized:
undivert(AC_DIVERSION_HELP_ENABLE)dnl
--with/--without options recognized:
undivert(AC_DIVERSION_HELP_WITH)"dnl
--enable/--with options recognized:
undivert(AC_DIVERSION_HELP)"dnl
changequote([, ])dnl
# Initialize some variables set by options.
@ -358,25 +364,24 @@ fi
dnl
dnl Try to have only one #! line, just so it doesn't look funny.
dnl
define(AC_BINSH,
[AC_PROVIDE([AC_BINSH])dnl
dnl AC_REQUIRE inserts a newline after this.
#!/bin/sh])dnl
AC_DEFUN(AC_BINSH,
[#!/bin/sh
])dnl
dnl
define(AC_INIT,
AC_DEFUN(AC_INIT,
[AC_REQUIRE([AC_BINSH])dnl
AC_INIT_NOTICE
AC_INIT_PARSEARGS
AC_INIT_PREPARE($1)])dnl
dnl
dnl AC_INIT_PREPARE(UNIQUE-FILE-IN-SOURCE-DIR)
define(AC_INIT_PREPARE,
AC_DEFUN(AC_INIT_PREPARE,
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
AC_BEFORE([$0], [AC_CONFIG_HEADER])dnl
AC_BEFORE([$0], [AC_REVISION])dnl
AC_BEFORE([$0], [AC_PREREQ])dnl
AC_BEFORE([$0], [AC_CONFIG_SUBDIRS])dnl
dnl AC_BEFORE([$0], [AC_CONFIG_SUBDIRS])dnl
trap 'rm -fr conftest* confdefs* core $ac_clean_files; exit 1' 1 2 15
trap 'rm -fr confdefs* $ac_clean_files' 0
@ -465,27 +470,25 @@ AC_SITE_LOAD
AC_CACHE_LOAD
AC_LANG_C
undivert(AC_DIVERSION_ARG_ENABLE)dnl
undivert(AC_DIVERSION_ARG_WITH)dnl
undivert(AC_DIVERSION_ARG)dnl
])dnl
dnl
dnl AC_ARG_ENABLE(FEATURE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_ENABLE,
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_ENABLE)dnl
AC_DEFUN(AC_ARG_ENABLE,
[divert(AC_DIVERSION_HELP)dnl
$2
divert(AC_DIVERSION_ARG_ENABLE)dnl
divert(AC_DIVERSION_ARG)dnl
AC_ENABLE_INTERNAL([$1], [$3], [$4])dnl
divert(AC_DIVERSION_NORMAL)dnl
])dnl
dnl
define(AC_ENABLE,
AC_DEFUN(AC_ENABLE,
[AC_OBSOLETE([$0], [; instead use AC_ARG_ENABLE before AC_INIT])dnl
AC_ENABLE_INTERNAL([$1], [$2], [$3])dnl
])dnl
dnl
dnl AC_ENABLE_INTERNAL(FEATURE, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ENABLE_INTERNAL,
AC_DEFUN(AC_ENABLE_INTERNAL,
[[#] Check whether --enable-$1 or --disable-$1 was given.
enableval="[$enable_]patsubst($1, -, _)"
if test -n "$enableval"; then
@ -497,22 +500,21 @@ fi
])dnl
dnl
dnl AC_ARG_WITH(PACKAGE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_WITH,
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_WITH)dnl
AC_DEFUN(AC_ARG_WITH,
[divert(AC_DIVERSION_HELP)dnl
$2
divert(AC_DIVERSION_ARG_WITH)dnl
divert(AC_DIVERSION_ARG)dnl
AC_WITH_INTERNAL([$1], [$3], [$4])dnl
divert(AC_DIVERSION_NORMAL)dnl
])dnl
dnl
define(AC_WITH,
AC_DEFUN(AC_WITH,
[AC_OBSOLETE([$0], [; instead use AC_ARG_WITH before AC_INIT])dnl
AC_WITH_INTERNAL([$1], [$2], [$3])dnl
])dnl
dnl
dnl AC_WITH_INTERNAL(PACKAGE, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_WITH_INTERNAL,
AC_DEFUN(AC_WITH_INTERNAL,
[[#] Check whether --with-$1 or --without-$1 was given.
withval="[$with_]patsubst($1, -, _)"
if test -n "$withval"; then
@ -524,24 +526,28 @@ fi
])dnl
dnl
dnl AC_CONFIG_HEADER(HEADER-TO-CREATE ...)
define(AC_CONFIG_HEADER, [AC_PROVIDE([$0])define(AC_LIST_HEADERS, $1)])dnl
AC_DEFUN(AC_CONFIG_HEADER,
[define(AC_LIST_HEADERS, $1)])dnl
dnl
dnl AC_REVISION(REVISION-INFO)
define(AC_REVISION, [AC_PROVIDE([$0])AC_REQUIRE([AC_BINSH])dnl
AC_DEFUN(AC_REVISION,
[AC_REQUIRE([AC_BINSH])dnl
[# From configure.in] translit([$1], $")])dnl
dnl
dnl Subroutines of AC_PREREQ.
dnl
dnl Change the dots in version number $1 into commas.
define(AC_PREREQ_SPLIT, [translit($1, ., [, ])])dnl
AC_DEFUN(AC_PREREQ_SPLIT,
[translit($1, ., [, ])])dnl
dnl
dnl Default the ternary version number to 0 (e.g., 1, 7 -> 1, 7, 0).
define(AC_PREREQ_CANON, [$1, $2, ifelse([$3], , 0, [$3])])dnl
AC_DEFUN(AC_PREREQ_CANON,
[$1, $2, ifelse([$3], , 0, [$3])])dnl
dnl
dnl Complain and exit if the version number in $1 through $3 is less than
dnl the version number in $4 through $6.
dnl $7 is the printable version of the second version number.
define(AC_PREREQ_COMPARE,
AC_DEFUN(AC_PREREQ_COMPARE,
[ifelse(builtin([eval],
[$3 + $2 * 100 + $1 * 10000 < $6 + $5 * 100 + $4 * 10000]), 1,
[errprint(Autoconf version $7 or higher is required
@ -549,17 +555,15 @@ define(AC_PREREQ_COMPARE,
dnl
dnl Complain and exit if the Autoconf version is less than $1.
dnl AC_PREREQ(VERSION)
define(AC_PREREQ,
[AC_PROVIDE([$0])dnl
AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
AC_DEFUN(AC_PREREQ,
[AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])), [$1])])dnl
dnl
dnl Run configure in subdirectories $1.
dnl Not actually done until AC_OUTPUT_SUBDIRS.
dnl AC_CONFIG_SUBDIRS(DIR ...)
define(AC_CONFIG_SUBDIRS,
[AC_PROVIDE([$0])dnl
AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
AC_DEFUN(AC_CONFIG_SUBDIRS,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
define([AC_LIST_SUBDIRS], [$1])])dnl
dnl
dnl Guess the value for the `prefix' variable by looking for
@ -567,8 +571,9 @@ dnl the argument program along PATH and taking its parent.
dnl Example: if the argument is `gcc' and we find /usr/local/gnu/bin/gcc,
dnl set `prefix' to /usr/local/gnu.
dnl AC_PREFIX_PROGRAM(PROGRAM)
define(AC_PREFIX_PROGRAM, [define([AC_LIST_PREFIX_PROGRAM], [$1])])dnl
define(AC_PREFIX_INTERNAL,
AC_DEFUN(AC_PREFIX_PROGRAM,
[define([AC_LIST_PREFIX_PROGRAM], [$1])])dnl
AC_DEFUN(AC_PREFIX_INTERNAL,
[if test "x$prefix" = xNONE; then
changequote(<<, >>)dnl
define(<<AC_VAR_NAME>>, translit($1, [a-z], [A-Z]))dnl
@ -582,7 +587,7 @@ changequote([, ])dnl
fi
undefine(AC_VAR_NAME)dnl
])dnl
define(AC_PREFIX,
AC_DEFUN(AC_PREFIX,
[AC_OBSOLETE([$0], [; instead use AC_PREFIX_PROGRAM before AC_INIT])dnl
AC_PREFIX_INTERNAL([$1])])dnl
dnl
@ -594,12 +599,12 @@ dnl Find install.sh, config.sub, config.guess, and Cygnus configure
dnl in directory $1. These are auxiliary files used in configuration.
dnl $1 can be either absolute or relative to ${srcdir}.
dnl AC_CONFIG_AUX_DIR(DIR)
define(AC_CONFIG_AUX_DIR,
AC_DEFUN(AC_CONFIG_AUX_DIR,
[AC_CONFIG_AUX_DIRS($1 ${srcdir}/$1)])dnl
dnl
dnl The default is `${srcdir}' or `${srcdir}/..' or `${srcdir}/../..'.
dnl There's no need to call this macro explicitly; just AC_REQUIRE it.
define(AC_CONFIG_AUX_DIR_DEFAULT,
AC_DEFUN(AC_CONFIG_AUX_DIR_DEFAULT,
[AC_CONFIG_AUX_DIRS(${srcdir} ${srcdir}/.. ${srcdir}/../..)])dnl
dnl
dnl Internal subroutine.
@ -607,7 +612,7 @@ dnl Search for the configuration auxiliary files in directory list $1.
dnl We look only for install.sh, so users of AC_PROG_INSTALL
dnl do not automatically need to distribute the other auxiliary files.
dnl AC_CONFIG_AUX_DIRS(DIR ...)
define(AC_CONFIG_AUX_DIRS,
AC_DEFUN(AC_CONFIG_AUX_DIRS,
[ac_aux_dir=
for ac_dir in $1; do
if test -f $ac_dir/install.sh; then
@ -625,7 +630,7 @@ AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
])dnl
dnl
dnl Canonicalize the host, target, and build system types.
define(AC_CANONICAL_SYSTEM,
AC_DEFUN(AC_CANONICAL_SYSTEM,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Do some error checking and defaulting for the host and target type.
# The inputs are:
@ -663,7 +668,7 @@ AC_CANONICAL_BUILD
dnl
dnl Subroutines of AC_CANONICAL_SYSTEM.
dnl
define(AC_CANONICAL_HOST,
AC_DEFUN(AC_CANONICAL_HOST,
[AC_MSG_CHECKING(host system type)
case "${host_alias}" in
@ -689,7 +694,7 @@ AC_SUBST(host_vendor)dnl
AC_SUBST(host_os)dnl
])dnl
dnl
define(AC_CANONICAL_TARGET,
AC_DEFUN(AC_CANONICAL_TARGET,
[AC_MSG_CHECKING(target system type)
case "${target_alias}" in
@ -712,7 +717,7 @@ AC_SUBST(target_vendor)dnl
AC_SUBST(target_os)dnl
])dnl
dnl
define(AC_CANONICAL_BUILD,
AC_DEFUN(AC_CANONICAL_BUILD,
[AC_MSG_CHECKING(build system type)
case "${build_alias}" in
@ -736,7 +741,7 @@ dnl Link each of the existing files in $2 to the corresponding
dnl link name in $1.
dnl Not actually done until AC_OUTPUT_LINKS.
dnl AC_LINK_FILES(LINK ..., FILE ...)
define(AC_LINK_FILES,
AC_DEFUN(AC_LINK_FILES,
[define([AC_LIST_LINKS], [$1])define([AC_LIST_FILES], [$2])])dnl
dnl
dnl
@ -744,7 +749,7 @@ dnl ### Caching test results
dnl
dnl
dnl Look for site or system specific initialization scripts.
define(AC_SITE_LOAD,
AC_DEFUN(AC_SITE_LOAD,
[ac_site_dirs=/usr/local
if test "x$prefix" != xNONE; then
ac_site_dirs=$prefix
@ -762,16 +767,17 @@ for ac_site_dir in $ac_site_dirs; do
done
])dnl
dnl
define(AC_CACHE_LOAD,
AC_DEFUN(AC_CACHE_LOAD,
[if test -r "$cache_file"; then
echo "loading cache $cache_file"
. $cache_file
else
echo "creating cache $cache_file"
> $cache_file
fi])dnl
fi
])dnl
dnl
define(AC_CACHE_SAVE,
AC_DEFUN(AC_CACHE_SAVE,
[if test -w $cache_file; then
echo "updating cache $cache_file"
cat > $cache_file <<\CEOF
@ -793,11 +799,12 @@ dnl Allow a site initialization script to override cache values.
# Ultrix sh set writes to stderr and can't be redirected directly.
(set) 2>&1 | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
changequote([, ])dnl
fi])dnl
fi
])dnl
dnl
dnl AC_CACHE_VAL(CACHE-ID, COMMANDS-TO-SET-IT)
dnl The name of shell var CACHE-ID must contain `_cv_' in order to get saved.
define(AC_CACHE_VAL,
AC_DEFUN(AC_CACHE_VAL,
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
dnl We used to use the below line, but it fails if the 1st arg is a
dnl shell variable, so we need the eval.
@ -816,38 +823,43 @@ dnl
dnl Several simple subroutines to do various flavors of quoting.
dnl
dnl Quote $1 against shell "s.
define(AC_QUOTE_DQUOTE, [dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
AC_DEFUN(AC_QUOTE_DQUOTE,
[dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
patsubst($1, changequote(, )\([$"`\\]\)changequote([, ]), \\\1)])dnl
dnl
dnl Quote $1 against shell 's.
define(AC_QUOTE_SQUOTE, [patsubst($1, ', '\\'')])dnl
AC_DEFUN(AC_QUOTE_SQUOTE,
[patsubst($1, ', '\\'')])dnl
dnl
dnl Quote $1 against shell here documents (<<EOF).
define(AC_QUOTE_HERE, [changequote({, })dnl
AC_DEFUN(AC_QUOTE_HERE,
[changequote({, })dnl
dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
patsubst(patsubst($1, \(\\[$`\\]\), \\\1), \([$`]\), \\\1){}dnl
changequote([, ])])dnl
dnl
dnl Quote $1 against the right hand side of a sed substitution.
define(AC_QUOTE_SED, [changequote({, })dnl
AC_DEFUN(AC_QUOTE_SED,
[changequote({, })dnl
dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
dnl % and @ and ! are commonly used as the sed s separator character.
patsubst($1, \([&\\%@!]\), \\\1){}dnl
changequote([, ])])dnl
dnl
dnl Quote $1 against tokenization.
define(AC_QUOTE_TOKEN, [changequote({, })dnl
AC_DEFUN(AC_QUOTE_TOKEN,
[changequote({, })dnl
patsubst($1, \([ ]\), \\\1){}dnl
changequote([, ])])dnl
dnl
dnl Subroutines of AC_DEFINE. Does more quoting magic than any sane person
dnl should be able to understand. The point of it all is that what goes into
dnl Makefile et al should be verbatim what was written in configure.in.
define(AC_DEFINE_QUOTE, [dnl
AC_QUOTE_TOKEN(AC_QUOTE_SQUOTE(AC_QUOTE_DQUOTE($1)))])dnl
AC_DEFUN(AC_DEFINE_QUOTE,
[AC_QUOTE_TOKEN(AC_QUOTE_SQUOTE(AC_QUOTE_DQUOTE($1)))])dnl
dnl
define(AC_DEFINE_SEDQUOTE, [dnl
AC_QUOTE_DQUOTE(AC_QUOTE_HERE(AC_QUOTE_HERE(AC_QUOTE_SED($1))))])dnl
AC_DEFUN(AC_DEFINE_SEDQUOTE,
[AC_QUOTE_DQUOTE(AC_QUOTE_HERE(AC_QUOTE_HERE(AC_QUOTE_SED($1))))])dnl
dnl
dnl Don't compare $2 to a blank, so we can support "-Dfoo=".
dnl If creating a configuration header file, we add
@ -857,7 +869,8 @@ dnl variable parts of the string: the variable name to define
dnl and the value to give it.
dnl The newlines around the curly braces prevent sh syntax errors.
dnl AC_DEFINE(VARIABLE [, VALUE])
define(AC_DEFINE, [
AC_DEFUN(AC_DEFINE,
[
{
dnl Uniformly use AC_DEFINE_[SED]QUOTE, so callers of AC_DEFINE_UNQUOTED
dnl can use AC_QUOTE_* manually if they want to.
@ -885,9 +898,10 @@ dnl the top level, because m4 doesn't really support nested functions;
dnl it doesn't distinguish between the arguments to the outer
dnl function, which should be expanded, and the arguments to the inner
dnl function, which shouldn't yet.
define(AC_QUOTE_IDENTITY, $1)dnl
define(AC_DEFINE_UNQUOTED, [dnl
pushdef([AC_QUOTE_SQUOTE], defn([AC_QUOTE_IDENTITY]))dnl
AC_DEFUN(AC_QUOTE_IDENTITY,
$1)dnl
AC_DEFUN(AC_DEFINE_UNQUOTED,
[pushdef([AC_QUOTE_SQUOTE], defn([AC_QUOTE_IDENTITY]))dnl
pushdef([AC_DEFINE_SEDQUOTE], defn([AC_QUOTE_IDENTITY]))dnl
AC_DEFINE($1, $2)dnl
popdef([AC_DEFINE_SEDQUOTE])dnl
@ -897,7 +911,7 @@ dnl
dnl This macro protects the argument from being diverted twice
dnl if this macro is called twice for it.
dnl AC_SUBST(VARIABLE)
define(AC_SUBST,
AC_DEFUN(AC_SUBST,
[ifdef([AC_SUBST_$1], ,
[define([AC_SUBST_$1], )dnl
divert(AC_DIVERSION_SED)dnl
@ -908,7 +922,7 @@ divert(AC_DIVERSION_NORMAL)dnl
])])dnl
dnl
dnl AC_SUBST_FILE(VARIABLE, FILE)
define(AC_SUBST_FILE,
AC_DEFUN(AC_SUBST_FILE,
[if test -f $2; then
echo using $2 for $1)
AC_INSERT_FILE($1, $2)
@ -917,7 +931,7 @@ elif test -f ${srcdir}/$2; then
AC_INSERT_FILE($1, ${srcdir}/$2)
fi
])dnl
define(AC_INSERT_FILE,
AC_DEFUN(AC_INSERT_FILE,
[ifdef([AC_SUBST_$1], ,
[define([AC_SUBST_$1], )dnl
divert(AC_DIVERSION_SED)dnl
@ -933,47 +947,44 @@ dnl ### Printing messages
dnl
dnl
dnl AC_MSG_CHECKING(FEATURE-DESCRIPTION)
define(AC_MSG_CHECKING,
AC_DEFUN(AC_MSG_CHECKING,
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
echo $ac_n "checking $1""... $ac_c" 1>&4])dnl
dnl
define(AC_CHECKING,
[AC_OBSOLETE([$0], [; instead use AC_MSG_CHECKING])dnl
echo "checking $1" 1>&4])dnl
AC_DEFUN(AC_CHECKING,
[echo "checking $1" 1>&4])dnl
dnl
dnl AC_MSG_RESULT(RESULT-DESCRIPTION)
define(AC_MSG_RESULT,
AC_DEFUN(AC_MSG_RESULT,
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
echo "$ac_t""$1" 1>&4])dnl
dnl
define(AC_VERBOSE,
AC_DEFUN(AC_VERBOSE,
[AC_OBSOLETE([$0], [; instead use AC_MSG_RESULT])dnl
echo " $1" 1>&4])dnl
dnl
dnl AC_MSG_WARN(PROBLEM-DESCRIPTION)
define(AC_MSG_WARN,
AC_DEFUN(AC_MSG_WARN,
[echo "configure: warning: $1" 1>&2])dnl
dnl
dnl AC_MSG_ERROR(ERROR-DESCRIPTION)
define(AC_MSG_ERROR,
AC_DEFUN(AC_MSG_ERROR,
[echo "configure: $1" 1>&2; exit 1])dnl
dnl
dnl
dnl ### Selecting which language to use for testing
dnl
dnl
define(AC_LANG_C,
AC_DEFUN(AC_LANG_C,
[define([AC_LANG], [C])dnl
AC_PROVIDE([$0])dnl
ac_ext=c
# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
ac_cpp='${CPP}'
ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&5 2>&5'
])dnl
dnl
define(AC_LANG_CPLUSPLUS,
AC_DEFUN(AC_LANG_CPLUSPLUS,
[define([AC_LANG], [CPLUSPLUS])dnl
AC_PROVIDE([$0])dnl
ac_ext=C
# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
ac_cpp='${CXXCPP}'
@ -981,10 +992,11 @@ ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1
])dnl
dnl
dnl Push the current language on a stack.
define(AC_LANG_SAVE, [pushdef([AC_LANG_STACK], AC_LANG)])dnl
AC_DEFUN(AC_LANG_SAVE,
[pushdef([AC_LANG_STACK], AC_LANG)])dnl
dnl
dnl Restore the current language from the stack.
define(AC_LANG_RESTORE,
AC_DEFUN(AC_LANG_RESTORE,
[ifelse(AC_LANG_STACK, C, [ifelse(AC_LANG, C, , [AC_LANG_C])], [ifelse(AC_LANG, CPLUSPLUS, , [AC_LANG_CPLUSPLUS])])[]popdef([AC_LANG_STACK])])dnl
dnl
dnl
@ -992,21 +1004,20 @@ dnl ### Enforcing ordering constraints
dnl
dnl
dnl AC_BEFORE(THIS-MACRO-NAME, CALLED-MACRO-NAME)
define(AC_BEFORE,
AC_DEFUN(AC_BEFORE,
[ifdef([AC_PROVIDE_$2], [errprint(__file__:__line__: [$2 was called before $1
])])])dnl
dnl
dnl AC_REQUIRE(MACRO-NAME)
define(AC_REQUIRE,
[ifdef([AC_PROVIDE_$1], , [indir([$1])
])])dnl
AC_DEFUN(AC_REQUIRE,
[ifdef([AC_PROVIDE_$1], , [indir([$1])])])dnl
dnl
dnl AC_PROVIDE(MACRO-NAME)
define(AC_PROVIDE,
[define([AC_PROVIDE_$1], )])dnl
dnl
dnl AC_OBSOLETE(THIS-MACRO-NAME [, SUGGESTION])
define(AC_OBSOLETE,
AC_DEFUN(AC_OBSOLETE,
[errprint(__file__:__line__: warning: [$1] is obsolete[$2]
)])dnl
dnl
@ -1016,7 +1027,7 @@ dnl
dnl
dnl AC_CHECK_PROG(VARIABLE, PROG-TO-CHECK-FOR, VALUE-IF-FOUND
dnl [, VALUE-IF-NOT-FOUND])
define(AC_CHECK_PROG,
AC_DEFUN(AC_CHECK_PROG,
[# Extract the first word of "$2", so it can be a program name with args.
set dummy $2; ac_word=[$]2
AC_MSG_CHECKING([for $ac_word])
@ -1039,12 +1050,16 @@ ifelse([$4], , , [ test -z "[$]ac_cv_prog_$1" && ac_cv_prog_$1="$4"
])dnl
fi])dnl
$1="$ac_cv_prog_$1"
test -n "[$]$1" && AC_MSG_RESULT([$]$1)
if test -n "[$]$1"; then
AC_MSG_RESULT([$]$1)
else
AC_MSG_RESULT(no)
fi
AC_SUBST($1)dnl
])dnl
dnl
dnl AC_PATH_PROG(VARIABLE, PROG-TO-CHECK-FOR [, VALUE-IF-NOT-FOUND])
define(AC_PATH_PROG,
AC_DEFUN(AC_PATH_PROG,
[# Extract the first word of "$2", so it can be a program name with args.
set dummy $2; ac_word=[$]2
AC_MSG_CHECKING([for $ac_word])
@ -1070,7 +1085,11 @@ ifelse([$3], , , [ test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$3"
;;
esac])dnl
$1="$ac_cv_path_$1"
test -n "[$]$1" && AC_MSG_RESULT([$]$1)
if test -n "[$]$1"; then
AC_MSG_RESULT([$]$1)
else
AC_MSG_RESULT(no)
fi
AC_SUBST($1)dnl
])dnl
dnl
@ -1079,7 +1098,7 @@ dnl ### Checking for files - derived (caching)
dnl
dnl
dnl AC_CHECK_PROGS(VARIABLE, PROGS-TO-CHECK-FOR [, VALUE-IF-NOT-FOUND])
define(AC_CHECK_PROGS,
AC_DEFUN(AC_CHECK_PROGS,
[for ac_prog in $2
do
AC_CHECK_PROG($1, [$]ac_prog, [$]ac_prog, )
@ -1089,7 +1108,7 @@ ifelse([$3], , , [test -n "[$]$1" || $1="$3"
])])dnl
dnl
dnl AC_PATH_PROGS(VARIABLE, PROGS-TO-CHECK-FOR [, VALUE-IF-NOT-FOUND])
define(AC_PATH_PROGS,
AC_DEFUN(AC_PATH_PROGS,
[for ac_prog in $2
do
AC_PATH_PROG($1, [$]ac_prog)
@ -1100,7 +1119,7 @@ ifelse([$3], , , [test -n "[$]$1" || $1="$3"
dnl
dnl AC_CHECK_LIB(LIBRARY, FUNCTION, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
dnl [, OTHER-LIBRARIES]]])
define(AC_CHECK_LIB,
AC_DEFUN(AC_CHECK_LIB,
[changequote(/, /)dnl
define(/AC_LIB_NAME/, dnl
patsubst(patsubst($1, /lib\([^\.]*\)\.a/, /\1/), /-l/, //))dnl
@ -1129,7 +1148,7 @@ undefine(AC_CV_NAME)dnl
dnl
dnl AC_HAVE_LIBRARY(LIBRARY, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
dnl [, OTHER-LIBRARIES]]])
define(AC_HAVE_LIBRARY,
AC_DEFUN(AC_HAVE_LIBRARY,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_LIB])dnl
AC_CHECK_LIB([$1], main, [$2], [$3], [$4])dnl
])dnl
@ -1140,17 +1159,15 @@ dnl
dnl
dnl AC_EGREP_HEADER(PATTERN, HEADER-FILE, ACTION-IF-FOUND [,
dnl ACTION-IF-NOT-FOUND])
define(AC_EGREP_HEADER,
[AC_PROVIDE([$0])dnl
AC_EGREP_CPP([$1], [#include <$2>], [$3], [$4])])dnl
AC_DEFUN(AC_EGREP_HEADER,
[AC_EGREP_CPP([$1], [#include <$2>], [$3], [$4])])dnl
dnl
dnl Because this macro is used by AC_PROG_GCC_TRADITIONAL, which must come early,
dnl it is not included in AC_BEFORE checks.
dnl Because this macro is used by AC_PROG_GCC_TRADITIONAL, which must
dnl come early, it is not included in AC_BEFORE checks.
dnl AC_EGREP_CPP(PATTERN, PROGRAM, ACTION-IF-FOUND [,
dnl ACTION-IF-NOT-FOUND])
define(AC_EGREP_CPP,
AC_DEFUN(AC_EGREP_CPP,
[AC_REQUIRE_CPP()dnl
AC_PROVIDE([$0])dnl
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$2]
@ -1169,9 +1186,8 @@ rm -f conftest*
dnl
dnl AC_COMPILE_CHECK(ECHO-TEXT, INCLUDES, FUNCTION-BODY,
dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_COMPILE_CHECK,
[AC_PROVIDE([$0])dnl
dnl It's actually ok to use this, if you don't care about caching.
AC_DEFUN(AC_COMPILE_CHECK,
[dnl It's actually ok to use this, if you don't care about caching.
dnl AC_OBSOLETE([$0], [; instead use AC_TRY_LINK])dnl
ifelse([$1], , , [AC_CHECKING([for $1])
])dnl
@ -1180,9 +1196,8 @@ AC_TRY_LINK([$2], [$3], [$4], [$5])dnl
dnl
dnl AC_TRY_LINK(INCLUDES, FUNCTION-BODY,
dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_TRY_LINK,
[AC_PROVIDE([$0])dnl
dnl We use return because because C++ requires a prototype for exit.
AC_DEFUN(AC_TRY_LINK,
[dnl We use return because because C++ requires a prototype for exit.
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$1]
@ -1204,9 +1219,8 @@ rm -f conftest*]
dnl
dnl AC_TRY_RUN(PROGRAM, ACTION-IF-TRUE [, ACTION-IF-FALSE
dnl [, ACTION-IF-CROSS-COMPILING]])
define(AC_TRY_RUN,
[AC_PROVIDE([$0])dnl
AC_REQUIRE([AC_C_CROSS])dnl
AC_DEFUN(AC_TRY_RUN,
[AC_REQUIRE([AC_C_CROSS])dnl
if test "$cross_compiling" = yes; then
ifelse([$4], , AC_MSG_ERROR(can not run test program while cross compiling),
[AC_MSG_WARN(using default for cross-compiling)
@ -1228,7 +1242,7 @@ fi
rm -fr conftest*])dnl
dnl
dnl AC_TRY_CPP(INCLUDES, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_TRY_CPP,
AC_DEFUN(AC_TRY_CPP,
[AC_REQUIRE_CPP()dnl
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
@ -1252,7 +1266,7 @@ dnl ### Checking for C features - derived (caching)
dnl
dnl
dnl AC_CHECK_HEADER(HEADER-FILE, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_CHECK_HEADER,
AC_DEFUN(AC_CHECK_HEADER,
[dnl Do the transliteration at runtime so arg 1 can be a shell variable.
ac_var=`echo "$1" | tr './' '__'`
AC_MSG_CHECKING([for $1])
@ -1270,7 +1284,7 @@ fi
])dnl
dnl
dnl AC_CHECK_FUNC(FUNCTION, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_CHECK_FUNC,
AC_DEFUN(AC_CHECK_FUNC,
[AC_MSG_CHECKING([for $1])
AC_CACHE_VAL(ac_cv_func_$1,
[AC_TRY_LINK(
@ -1296,7 +1310,7 @@ fi
])dnl
dnl
dnl AC_CHECK_FUNCS(FUNCTION...)
define(AC_CHECK_FUNCS,
AC_DEFUN(AC_CHECK_FUNCS,
[for ac_func in $1
do
changequote(, )dnl
@ -1307,7 +1321,7 @@ done
])dnl
dnl
dnl AC_CHECK_HEADERS(HEADER-FILE...)
define(AC_CHECK_HEADERS,
AC_DEFUN(AC_CHECK_HEADERS,
[AC_REQUIRE_CPP()dnl Make sure the cpp check happens outside the loop.
for ac_hdr in $1
do
@ -1319,7 +1333,7 @@ done
])dnl
dnl
dnl AC_REPLACE_FUNCS(FUNCTION-NAME...)
define(AC_REPLACE_FUNCS,
AC_DEFUN(AC_REPLACE_FUNCS,
[for ac_func in $1
do
AC_CHECK_FUNC(${ac_func}, , [LIBOBJS="$LIBOBJS ${ac_func}.o"])
@ -1328,7 +1342,7 @@ AC_SUBST(LIBOBJS)dnl
])dnl
dnl
dnl AC_CHECK_SIZEOF(TYPE)
define(AC_CHECK_SIZEOF,
AC_DEFUN(AC_CHECK_SIZEOF,
[changequote(<<, >>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
@ -1352,7 +1366,7 @@ undefine(AC_CV_NAME)dnl
])dnl
dnl
dnl AC_CHECK_TYPE(TYPE, DEFAULT)
define(AC_CHECK_TYPE,
AC_DEFUN(AC_CHECK_TYPE,
[AC_MSG_CHECKING(for $1 in sys/types.h)
AC_CACHE_VAL(ac_cv_type_$1,
[AC_EGREP_HEADER($1, sys/types.h, ac_cv_type_$1=yes, ac_cv_type_$1=no)])dnl
@ -1367,7 +1381,7 @@ dnl ### The big finish
dnl
dnl
dnl AC_OUTPUT([FILE...] [, EXTRA-CMDS])
define(AC_OUTPUT,
AC_DEFUN(AC_OUTPUT,
[AC_CACHE_SAVE
test "x$prefix" = xNONE && prefix=/usr/local
@ -1401,8 +1415,8 @@ ifdef([AC_LIST_HEADERS],
[divert(AC_DIVERSION_SED)dnl
s%@DEFS@%-DHAVE_CONFIG_H%],
[divert(AC_DIVERSION_SED)dnl
s%@DEFS@%$DEFS%]
[divert(AC_DIVERSION_VAR)dnl
s%@DEFS@%$DEFS%
divert(AC_DIVERSION_VAR)dnl
DEFS='$DEFS'
])dnl
divert(AC_DIVERSION_VAR)dnl
@ -1410,7 +1424,7 @@ ac_vpsub='$ac_vpsub'
extrasub='$extrasub'
divert(AC_DIVERSION_NORMAL)dnl
# Some shells look in PATH for config.status without the "./".
# Without the "./", some shells look in PATH for config.status.
: ${CONFIG_STATUS=./config.status}
trap "rm -f ${CONFIG_STATUS}; exit 1" 1 2 15
@ -1546,7 +1560,7 @@ dnl
dnl Create the header files listed in $1.
dnl This is a subroutine of AC_OUTPUT. It is called inside a quoted
dnl here document whose contents are going into config.status.
define(AC_OUTPUT_HEADER,
AC_DEFUN(AC_OUTPUT_HEADER,
[changequote(<<, >>)dnl
# These sed commands are put into ac_sed_defs when defining a macro.
@ -1661,7 +1675,7 @@ rm -f conftest.sed
])dnl
dnl
define(AC_OUTPUT_LINKS,
AC_DEFUN(AC_OUTPUT_LINKS,
[ac_links="$1"
ac_files="$2"
while test -n "${ac_files}"; do
@ -1683,7 +1697,7 @@ while test -n "${ac_files}"; do
done
])dnl
dnl
define(AC_OUTPUT_SUBDIRS,
AC_DEFUN(AC_OUTPUT_SUBDIRS,
[if test -z "${norecursion}"; then
# Remove --cache-file and --srcdir arguments so they do not pile up.

206
acspecific.m4
View File

@ -28,9 +28,8 @@ dnl Check whether to use -n, \c, or newline-tab to separate
dnl checking messages from result messages.
dnl Idea borrowed from dist 3.0.
dnl Internal use only.
define(AC_PROG_ECHO_N,
[AC_PROVIDE([$0])dnl
if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
AC_DEFUN(AC_PROG_ECHO_N,
[if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
if (echo -n testing; echo 1,2,3) | grep -e -n > /dev/null; then
ac_n= ac_c='
' ac_t=' '
@ -39,11 +38,11 @@ if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
fi
else
ac_n= ac_c='\c' ac_t=
fi])dnl
fi
])dnl
dnl
define(AC_PROG_CC,
AC_DEFUN(AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_PROVIDE([$0])dnl
AC_CHECK_PROG(CC, gcc, gcc, cc)
AC_MSG_CHECKING(whether we are using GNU C)
@ -62,9 +61,8 @@ AC_MSG_RESULT($ac_cv_prog_gcc)
if test $ac_cv_prog_gcc = yes; then GCC=yes; else GCC= ; fi
])dnl
dnl
define(AC_PROG_CXX,
AC_DEFUN(AC_PROG_CXX,
[AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
AC_PROVIDE([$0])dnl
AC_CHECK_PROGS(CXX, $CCC c++ g++ gcc CC cxx, gcc)
# Find out if we are using GNU C++, under whatever name.
@ -82,7 +80,7 @@ fi])dnl
if test $ac_cv_prog_gxx = yes; then GXX=yes; else GXX= ; fi
])dnl
dnl
define(AC_PROG_GCC_TRADITIONAL,
AC_DEFUN(AC_PROG_GCC_TRADITIONAL,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
if test $ac_cv_prog_gcc = yes; then
@ -106,7 +104,7 @@ Autoconf TCGETA'
fi
])dnl
dnl
define(AC_PROG_CC_C_O,
AC_DEFUN(AC_PROG_CC_C_O,
[if test "x$CC" != xcc; then
AC_MSG_CHECKING(whether $CC and cc understand -c and -o together)
else
@ -145,7 +143,7 @@ fi
])dnl
dnl
dnl Define SET_MAKE to set ${MAKE} if make doesn't.
define(AC_PROG_MAKE_SET,
AC_DEFUN(AC_PROG_MAKE_SET,
[AC_MSG_CHECKING(whether ${MAKE-make} sets \$MAKE)
set dummy ${MAKE-make}; ac_make=[$]2
AC_CACHE_VAL(ac_cv_prog_make_${ac_make}_set,
@ -173,15 +171,17 @@ fi
AC_SUBST([SET_MAKE])dnl
])dnl
dnl
define(AC_PROG_RANLIB, [AC_CHECK_PROG(RANLIB, ranlib, ranlib, :)])dnl
AC_DEFUN(AC_PROG_RANLIB,
[AC_CHECK_PROG(RANLIB, ranlib, ranlib, :)])dnl
dnl
define(AC_PROG_AWK, [AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])dnl
AC_DEFUN(AC_PROG_AWK,
[AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])dnl
dnl
define(AC_PROG_YACC, [AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])dnl
AC_DEFUN(AC_PROG_YACC,
[AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])dnl
dnl
define(AC_PROG_CPP,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(how to run the C preprocessor)
AC_DEFUN(AC_PROG_CPP,
[AC_MSG_CHECKING(how to run the C preprocessor)
if test -z "$CPP"; then
AC_CACHE_VAL(ac_cv_prog_CPP,
[ # This must be in double quotes, not single quotes, because CPP may get
@ -201,9 +201,8 @@ AC_MSG_RESULT($CPP)
AC_SUBST(CPP)dnl
])dnl
dnl
define(AC_PROG_CXXCPP,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(how to run the C++ preprocessor)
AC_DEFUN(AC_PROG_CXXCPP,
[AC_MSG_CHECKING(how to run the C++ preprocessor)
if test -z "$CXXCPP"; then
AC_CACHE_VAL(ac_cv_prog_CXXCPP,
[AC_LANG_SAVE[]dnl
@ -220,12 +219,11 @@ AC_SUBST(CXXCPP)dnl
dnl
dnl Require finding the C or C++ preprocessor, whichever is the
dnl current language.
define(AC_REQUIRE_CPP,
AC_DEFUN(AC_REQUIRE_CPP,
[ifelse(AC_LANG, C, [AC_REQUIRE([AC_PROG_CPP])], [AC_REQUIRE([AC_PROG_CXXCPP])])])dnl
dnl
define(AC_PROG_LEX,
[AC_PROVIDE([$0])dnl
AC_CHECK_PROG(LEX, flex, flex, lex)
AC_DEFUN(AC_PROG_LEX,
[AC_CHECK_PROG(LEX, flex, flex, lex)
AC_MSG_CHECKING(for $LEX library)
if test -z "$LEXLIB"
then
@ -237,7 +235,7 @@ fi
AC_MSG_RESULT($LEXLIB)
AC_SUBST(LEXLIB)])dnl
dnl
define(AC_DECL_YYTEXT,
AC_DEFUN(AC_DECL_YYTEXT,
[AC_REQUIRE_CPP()dnl
AC_REQUIRE([AC_PROG_LEX])dnl
AC_MSG_CHECKING(for yytext declaration)
@ -271,7 +269,7 @@ fi
AC_SUBST(LEX_OUTPUT_ROOT)dnl
])dnl
dnl
define(AC_PROG_INSTALL,
AC_DEFUN(AC_PROG_INSTALL,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Make sure to not get the incompatible SysV /etc/install and
# /usr/sbin/install, which might be in PATH before a BSD-like install,
@ -331,7 +329,7 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
AC_SUBST(INSTALL_DATA)dnl
])dnl
dnl
define(AC_PROG_LN_S,
AC_DEFUN(AC_PROG_LN_S,
[AC_MSG_CHECKING(whether ln -s works)
AC_CACHE_VAL(ac_cv_prog_LN_S,
[rm -f conftestdata
@ -351,7 +349,7 @@ fi
AC_SUBST(LN_S)dnl
])dnl
dnl
define(AC_PROG_RSH,
AC_DEFUN(AC_PROG_RSH,
[AC_MSG_CHECKING(for remote shell)
AC_CACHE_VAL(ac_cv_path_RSH,
[ac_cv_path_RSH=no
@ -379,7 +377,7 @@ dnl
dnl ### Checks for header files
dnl
dnl
define(AC_HEADER_STDC,
AC_DEFUN(AC_HEADER_STDC,
[AC_REQUIRE_CPP()dnl
AC_MSG_CHECKING(for ANSI C header files)
AC_CACHE_VAL(ac_cv_header_stdc,
@ -412,13 +410,14 @@ fi])dnl
AC_MSG_RESULT($ac_cv_header_stdc)
if test $ac_cv_header_stdc = yes; then
AC_DEFINE(STDC_HEADERS)
fi])dnl
fi
])dnl
dnl
define(AC_UNISTD_H,
AC_DEFUN(AC_UNISTD_H,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])dnl
AC_CHECK_HEADER(unistd.h, AC_DEFINE(HAVE_UNISTD_H))])dnl
dnl
define(AC_USG,
AC_DEFUN(AC_USG,
[AC_OBSOLETE([$0],
[; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])dnl
AC_MSG_CHECKING([for BSD string and memory functions])
@ -428,16 +427,17 @@ dnl
dnl
dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
dnl To avoid problems, don't check for gcc2 built-ins.
define(AC_MEMORY_H,
AC_DEFUN(AC_MEMORY_H,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])dnl
AC_MSG_CHECKING(whether string.h declares mem functions)
AC_EGREP_HEADER(memchr, string.h, ac_found=yes, ac_found=no)
AC_MSG_RESULT($ac_found)
if test $ac_found = no; then
AC_CHECK_HEADER(memory.h, [AC_DEFINE(NEED_MEMORY_H)])
fi])dnl
fi
])dnl
dnl
define(AC_HEADER_MAJOR,
AC_DEFUN(AC_HEADER_MAJOR,
[AC_MSG_CHECKING([for major, minor and makedev header])
AC_CACHE_VAL(ac_cv_header_major,
[AC_TRY_LINK([#include <sys/types.h>],
@ -455,9 +455,8 @@ sys/sysmacros.h) AC_DEFINE(MAJOR_IN_SYSMACROS) ;;
esac
])dnl
dnl
define(AC_HEADER_DIRENT,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(for directory library header)
AC_DEFUN(AC_HEADER_DIRENT,
[AC_MSG_CHECKING(for directory library header)
dnl We don't use AC_CHECK_HEADERS so we can stop when we get a match.
AC_CACHE_VAL(ac_cv_header_dir,
[ac_cv_header_dir=no
@ -488,9 +487,8 @@ fi
])dnl
dnl
dnl Obsolete.
define(AC_DIR_HEADER,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(for directory library header)
AC_DEFUN(AC_DIR_HEADER,
[AC_MSG_CHECKING(for directory library header)
AC_CACHE_VAL(ac_cv_header_dir,
[ac_cv_header_dir=no
for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
@ -519,7 +517,7 @@ if test $ac_cv_func_closedir_void = yes; then
fi
])dnl
dnl
define(AC_HEADER_STAT,
AC_DEFUN(AC_HEADER_STAT,
[AC_MSG_CHECKING(for broken stat file mode macros)
AC_CACHE_VAL(ac_cv_header_stat_broken,
[AC_EGREP_CPP([You lose], [#include <sys/types.h>
@ -551,7 +549,7 @@ if test $ac_cv_header_stat_broken = yes; then
fi
])dnl
dnl
define(AC_DECL_SYS_SIGLIST,
AC_DEFUN(AC_DECL_SYS_SIGLIST,
[AC_MSG_CHECKING([for sys_siglist declaration in signal.h or unistd.h])
AC_CACHE_VAL(ac_cv_decl_sys_siglist,
[AC_TRY_LINK([#include <sys/types.h>
@ -571,7 +569,7 @@ dnl
dnl ### Checks for typedefs
dnl
dnl
define(AC_TYPE_GETGROUPS,
AC_DEFUN(AC_TYPE_GETGROUPS,
[AC_REQUIRE([AC_TYPE_UID_T])dnl
AC_MSG_CHECKING(type of array argument to getgroups)
AC_CACHE_VAL(ac_cv_type_getgroups,
@ -604,9 +602,8 @@ AC_MSG_RESULT($ac_cv_type_getgroups)
AC_DEFINE_UNQUOTED(GETGROUPS_T, $ac_cv_type_getgroups)
])dnl
dnl
define(AC_TYPE_UID_T,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(for uid_t in sys/types.h)
AC_DEFUN(AC_TYPE_UID_T,
[AC_MSG_CHECKING(for uid_t in sys/types.h)
AC_CACHE_VAL(ac_cv_type_uid_t,
[AC_EGREP_HEADER(uid_t, sys/types.h,
ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)])dnl
@ -617,20 +614,21 @@ if test $ac_cv_type_uid_t = no; then
fi
])dnl
dnl
define(AC_TYPE_SIZE_T, [AC_CHECK_TYPE(size_t, unsigned)])dnl
AC_DEFUN(AC_TYPE_SIZE_T,
[AC_CHECK_TYPE(size_t, unsigned)])dnl
dnl
define(AC_TYPE_PID_T, [AC_CHECK_TYPE(pid_t, int)])dnl
AC_DEFUN(AC_TYPE_PID_T,
[AC_CHECK_TYPE(pid_t, int)])dnl
dnl
define(AC_TYPE_OFF_T,
[AC_PROVIDE([$0])dnl
AC_CHECK_TYPE(off_t, long)])dnl
AC_DEFUN(AC_TYPE_OFF_T,
[AC_CHECK_TYPE(off_t, long)])dnl
dnl
define(AC_TYPE_MODE_T, [AC_CHECK_TYPE(mode_t, int)])dnl
AC_DEFUN(AC_TYPE_MODE_T,
[AC_CHECK_TYPE(mode_t, int)])dnl
dnl
dnl Note that identifiers starting with SIG are reserved by ANSI C.
define(AC_TYPE_SIGNAL,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING([return type of signal handlers])
AC_DEFUN(AC_TYPE_SIGNAL,
[AC_MSG_CHECKING([return type of signal handlers])
AC_CACHE_VAL(ac_cv_type_signal,
[AC_TRY_LINK([#include <sys/types.h>
#include <signal.h>
@ -647,7 +645,7 @@ dnl
dnl ### Checks for functions
dnl
dnl
define(AC_FUNC_MMAP,
AC_DEFUN(AC_FUNC_MMAP,
[AC_MSG_CHECKING(for working mmap)
AC_CACHE_VAL(ac_cv_func_mmap,
[AC_TRY_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
@ -723,14 +721,14 @@ if test $ac_cv_func_mmap = yes; then
fi
])dnl
dnl
define(AC_FUNC_VPRINTF,
AC_DEFUN(AC_FUNC_VPRINTF,
[AC_CHECK_FUNC(vprintf, AC_DEFINE(HAVE_VPRINTF))
if test "$ac_cv_func_vprintf" != yes; then
AC_CHECK_FUNC(_doprnt, AC_DEFINE(HAVE_DOPRNT))
fi
])dnl
dnl
define(AC_FUNC_VFORK,
AC_DEFUN(AC_FUNC_VFORK,
[AC_REQUIRE([AC_TYPE_PID_T])dnl
AC_CHECK_HEADER(vfork.h, AC_DEFINE(HAVE_VFORK_H))
AC_MSG_CHECKING(for working vfork)
@ -842,7 +840,7 @@ if test $ac_cv_func_vfork = no; then
fi
])dnl
dnl
define(AC_FUNC_WAIT3,
AC_DEFUN(AC_FUNC_WAIT3,
[AC_MSG_CHECKING(for wait3 that fills in rusage)
AC_CACHE_VAL(ac_cv_func_wait3,
[AC_TRY_RUN([#include <sys/types.h>
@ -878,7 +876,7 @@ if test $ac_cv_func_wait3 = yes; then
fi
])dnl
dnl
define(AC_FUNC_ALLOCA,
AC_DEFUN(AC_FUNC_ALLOCA,
[# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments. Useless!
AC_MSG_CHECKING([for working alloca.h])
@ -963,7 +961,7 @@ fi
AC_SUBST(ALLOCA)dnl
])dnl
dnl
define(AC_FUNC_GETLOADAVG,
AC_DEFUN(AC_FUNC_GETLOADAVG,
[# Some definitions of getloadavg require that the program be installed setgid.
NEED_SETGID=false
AC_SUBST(NEED_SETGID)dnl
@ -1059,7 +1057,7 @@ fi
AC_SUBST(KMEM_GROUP)dnl
])dnl
dnl
define(AC_FUNC_UTIME_NULL,
AC_DEFUN(AC_FUNC_UTIME_NULL,
[AC_MSG_CHECKING(whether utime accepts a null argument)
AC_CACHE_VAL(ac_cv_func_utime_null,
[rm -f conftestdata; > conftestdata
@ -1079,7 +1077,7 @@ if test $ac_cv_func_utime_null = yes; then
fi
])dnl
dnl
define(AC_FUNC_STRCOLL,
AC_DEFUN(AC_FUNC_STRCOLL,
[AC_MSG_CHECKING(for strcoll)
AC_CACHE_VAL(ac_cv_func_strcoll,
[AC_TRY_RUN([#include <string.h>
@ -1095,7 +1093,7 @@ if test $ac_cv_func_strcoll = yes; then
fi
])dnl
dnl
define(AC_FUNC_SETVBUF_REVERSED,
AC_DEFUN(AC_FUNC_SETVBUF_REVERSED,
[AC_MSG_CHECKING(whether setvbuf arguments are reversed)
AC_CACHE_VAL(ac_cv_func_setvbuf_reversed,
[AC_TRY_RUN([#include <stdio.h>
@ -1120,9 +1118,8 @@ dnl
dnl ### Checks for structure members
dnl
dnl
define(AC_STRUCT_TM,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING([whether struct tm is in sys/time.h or time.h])
AC_DEFUN(AC_STRUCT_TM,
[AC_MSG_CHECKING([whether struct tm is in sys/time.h or time.h])
AC_CACHE_VAL(ac_cv_struct_tm,
[AC_TRY_LINK([#include <sys/types.h>
#include <time.h>],
@ -1134,7 +1131,7 @@ if test $ac_cv_struct_tm = sys/time.h; then
fi
])dnl
dnl
define(AC_HEADER_TIME,
AC_DEFUN(AC_HEADER_TIME,
[AC_MSG_CHECKING([whether time.h and sys/time.h may both be included])
AC_CACHE_VAL(ac_cv_header_time,
[AC_TRY_LINK([#include <sys/types.h>
@ -1147,7 +1144,7 @@ if test $ac_cv_header_time = yes; then
fi
])dnl
dnl
define(AC_STRUCT_TIMEZONE,
AC_DEFUN(AC_STRUCT_TIMEZONE,
[AC_REQUIRE([AC_STRUCT_TM])dnl
AC_MSG_CHECKING([for tm_zone in struct tm])
AC_CACHE_VAL(ac_cv_struct_tm_zone,
@ -1173,7 +1170,7 @@ extern char *tzname[]; /* RS6000 and others reject char **tzname. */
fi
])dnl
dnl
define(AC_STRUCT_ST_BLOCKS,
AC_DEFUN(AC_STRUCT_ST_BLOCKS,
[AC_MSG_CHECKING([for st_blocks in struct stat])
AC_CACHE_VAL(ac_cv_struct_st_blocks,
[AC_TRY_LINK([#include <sys/types.h>
@ -1188,7 +1185,7 @@ fi
AC_SUBST(LIBOBJS)dnl
])dnl
dnl
define(AC_STRUCT_ST_BLKSIZE,
AC_DEFUN(AC_STRUCT_ST_BLKSIZE,
[AC_MSG_CHECKING([for st_blksize in struct stat])
AC_CACHE_VAL(ac_cv_struct_st_blksize,
[AC_TRY_LINK([#include <sys/types.h>
@ -1200,7 +1197,7 @@ if test $ac_cv_struct_st_blksize = yes; then
fi
])dnl
dnl
define(AC_STRUCT_ST_RDEV,
AC_DEFUN(AC_STRUCT_ST_RDEV,
[AC_MSG_CHECKING([for st_rdev in struct stat])
AC_CACHE_VAL(ac_cv_struct_st_rdev,
[AC_TRY_LINK([#include <sys/types.h>
@ -1216,9 +1213,8 @@ dnl
dnl ### Checks for compiler characteristics
dnl
dnl
define(AC_C_CROSS,
[AC_PROVIDE([$0])dnl
# If we cannot run a trivial program, we must be cross compiling.
AC_DEFUN(AC_C_CROSS,
[# If we cannot run a trivial program, we must be cross compiling.
AC_MSG_CHECKING(whether cross-compiling)
AC_CACHE_VAL(ac_cv_c_cross,
[AC_TRY_RUN([main(){exit(0);}], ac_cv_c_cross=no, ac_cv_c_cross=yes)])dnl
@ -1226,7 +1222,7 @@ cross_compiling=$ac_cv_c_cross
AC_MSG_RESULT($ac_cv_c_cross)
])dnl
dnl
define(AC_C_CHAR_UNSIGNED,
AC_DEFUN(AC_C_CHAR_UNSIGNED,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_MSG_CHECKING(whether char is unsigned)
AC_CACHE_VAL(ac_cv_c_char_unsigned,
@ -1245,7 +1241,7 @@ if test $ac_cv_c_char_unsigned = yes && test "$GCC" != yes; then
fi
])dnl
dnl
define(AC_C_LONG_DOUBLE,
AC_DEFUN(AC_C_LONG_DOUBLE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_MSG_CHECKING(for long double)
AC_CACHE_VAL(ac_cv_c_long_double,
@ -1265,7 +1261,7 @@ if test $ac_cv_c_long_double = yes; then
fi
])dnl
dnl
define(AC_INT_16_BITS,
AC_DEFUN(AC_INT_16_BITS,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_SIZEOF(int)])
AC_MSG_CHECKING(integer size)
AC_TRY_RUN([main() { exit(sizeof(int) != 2); }],
@ -1273,7 +1269,7 @@ AC_TRY_RUN([main() { exit(sizeof(int) != 2); }],
AC_DEFINE(INT_16_BITS)], AC_MSG_RESULT(not 16 bits))
])dnl
dnl
define(AC_LONG_64_BITS,
AC_DEFUN(AC_LONG_64_BITS,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_SIZEOF(long)])
AC_MSG_CHECKING(for 64-bit long ints)
AC_TRY_RUN([main() { exit(sizeof(long int) != 8); }],
@ -1281,7 +1277,7 @@ AC_TRY_RUN([main() { exit(sizeof(long int) != 8); }],
AC_DEFINE(LONG_64_BITS)], AC_MSG_RESULT(not 64 bits))
])dnl
dnl
define(AC_C_BIGENDIAN,
AC_DEFUN(AC_C_BIGENDIAN,
[AC_MSG_CHECKING(whether byte ordering is bigendian)
AC_CACHE_VAL(ac_cv_c_bigendian,
[AC_TRY_RUN([main () {
@ -1300,7 +1296,7 @@ if test $ac_cv_c_bigendian = yes; then
fi
])dnl
dnl
define(AC_C_ARG_ARRAY,
AC_DEFUN(AC_C_ARG_ARRAY,
[AC_MSG_CHECKING(whether the address of an argument can be used as an array)
AC_CACHE_VAL(ac_cv_c_arg_array,
[AC_TRY_RUN([main() {
@ -1321,7 +1317,7 @@ if test $ac_cv_c_arg_array = no; then
fi
])dnl
dnl
define(AC_C_INLINE,
AC_DEFUN(AC_C_INLINE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_MSG_CHECKING([for inline])
AC_CACHE_VAL(ac_cv_c_inline,
@ -1335,7 +1331,7 @@ if test $ac_cv_c_inline = no; then
AC_DEFINE(inline, __inline)
fi
])dnl
define(AC_C_CONST,
AC_DEFUN(AC_C_CONST,
[dnl This message is consistent in form with the other checking messages,
dnl and with the result message.
AC_MSG_CHECKING([for working const])
@ -1392,7 +1388,8 @@ dnl
dnl ### Checks for operating system services
dnl
dnl
define(AC_HAVE_POUNDBANG,
dnl This macro is an oddball -- the only specific test that takes args.
AC_DEFUN(AC_HAVE_POUNDBANG,
[AC_MSG_CHECKING(whether [#]! works in shell scripts)
AC_CACHE_VAL(ac_cv_sys_interpreter,
[echo '#!/bin/cat
@ -1414,10 +1411,10 @@ ifelse([$2], , , [else
])dnl
fi
])dnl
define(AC_SYS_REMOTE_TAPE,
AC_DEFUN(AC_SYS_REMOTE_TAPE,
[AC_CHECK_HEADER(sys/mtio.h, AC_DEFINE(HAVE_SYS_MTIO_H))
if test "$ac_cv_header_mtio_h" = yes; then
if test "$ac_cv_header_sys_mtio_h" = yes; then
AC_MSG_CHECKING(for remote tape header files)
AC_CACHE_VAL(ac_cv_header_rmt,
[AC_TRY_CPP([#include <sgtty.h>
@ -1430,7 +1427,7 @@ fi
AC_SUBST(PROGS)dnl
])dnl
dnl
define(AC_SYS_LONG_FILE_NAMES,
AC_DEFUN(AC_SYS_LONG_FILE_NAMES,
[AC_MSG_CHECKING(for long file names)
AC_CACHE_VAL(ac_cv_sys_long_file_names,
[ac_cv_sys_long_file_names=yes
@ -1461,7 +1458,7 @@ if test $ac_cv_sys_long_file_names = yes; then
fi
])dnl
dnl
define(AC_SYS_RESTARTABLE_SYSCALLS,
AC_DEFUN(AC_SYS_RESTARTABLE_SYSCALLS,
[AC_MSG_CHECKING(for restartable system calls)
AC_CACHE_VAL(ac_cv_sys_restartable_syscalls,
[AC_TRY_RUN(
@ -1486,9 +1483,8 @@ if test $ac_cv_sys_restartable_syscalls = yes; then
fi
])dnl
dnl
define(AC_PATH_X,
AC_DEFUN(AC_PATH_X,
[AC_REQUIRE_CPP()dnl Set CPP; we run AC_PATH_X_DIRECT conditionally.
AC_PROVIDE([$0])dnl
# If we find X, set shell vars x_includes and x_libraries to the paths.
no_x=yes
if test "x$with_x" != xno; then
@ -1525,7 +1521,7 @@ fi # No --with-x=no.
])dnl
dnl
dnl Internal subroutine of AC_PATH_X.
define(AC_PATH_X_XMKMF,
AC_DEFUN(AC_PATH_X_XMKMF,
[AC_CHECKING(for X include and library files with xmkmf)
rm -fr conftestdir
if mkdir conftestdir; then
@ -1559,7 +1555,7 @@ fi
])dnl
dnl
dnl Internal subroutine of AC_PATH_X.
define(AC_PATH_X_DIRECT,
AC_DEFUN(AC_PATH_X_DIRECT,
[AC_CHECKING(for X include and library files directly)
test -z "$x_direct_test_library" && x_direct_test_library=Xt
test -z "$x_direct_test_include" && x_direct_test_include=X11/Intrinsic.h
@ -1658,7 +1654,7 @@ do
done)])dnl
dnl
dnl Find additional X libraries, magic flags, etc.
define(AC_PATH_XTRA,
AC_DEFUN(AC_PATH_XTRA,
[AC_REQUIRE([AC_OS_ISC])dnl
AC_REQUIRE([AC_PATH_X])dnl
AC_CHECKING(for additional X libraries and flags)
@ -1715,10 +1711,9 @@ dnl ### Checks for UNIX variants
dnl These are kludges; we need a more systematic approach.
dnl
dnl
define(AC_OS_AIX,
AC_DEFUN(AC_OS_AIX,
[AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_BEFORE([$0], [AC_TRY_CPP])dnl
AC_MSG_CHECKING(for AIX)
AC_EGREP_CPP(yes,
[#ifdef _AIX
@ -1727,10 +1722,9 @@ AC_EGREP_CPP(yes,
], [AC_MSG_RESULT(yes); AC_DEFINE(_ALL_SOURCE)], AC_MSG_RESULT(no))
])dnl
dnl
define(AC_OS_MINIX,
AC_DEFUN(AC_OS_MINIX,
[AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_BEFORE([$0], [AC_TRY_CPP])dnl
AC_CHECK_HEADER(minix/config.h, MINIX=yes, MINIX=)
# The Minix shell can not assign to the same variable on the same line!
if test "$MINIX" = yes; then
@ -1740,11 +1734,9 @@ if test "$MINIX" = yes; then
fi
])dnl
dnl
define(AC_OS_ISC,
[AC_PROVIDE([$0])dnl
AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_DEFUN(AC_OS_ISC,
[AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_BEFORE([$0], [AC_TRY_CPP])dnl
AC_MSG_CHECKING(for POSIXized ISC)
if test -d /etc/conf/kconfig.d &&
grep _POSIX_VERSION [/usr/include/sys/unistd.h] >/dev/null 2>&1
@ -1763,14 +1755,14 @@ else
fi
])dnl
dnl
define(AC_OS_XENIX,
AC_DEFUN(AC_OS_XENIX,
[AC_REQUIRE([AC_DIR_HEADER])dnl
AC_MSG_CHECKING(for Xenix)
AC_EGREP_CPP(yes,
[#if defined(M_XENIX) && !defined(M_UNIX)
yes
#endif
], [XENIX=yes AC_MSG_RESULT(yes)], [XENIX= AC_MSG_RESULT(no)])
], [AC_MSG_RESULT(yes); XENIX=yes], [AC_MSG_RESULT(no); XENIX=])
if test "$XENIX" = yes; then
LIBS="$LIBS -lx"
case "$DEFS" in
@ -1780,14 +1772,14 @@ if test "$XENIX" = yes; then
fi
])dnl
dnl
define(AC_OS_SCO,
AC_DEFUN(AC_OS_SCO,
[AC_CHECK_LIB(intl, strftime, LIBS="$LIBS -lintl")
])dnl
dnl
define(AC_OS_IRIX,
AC_DEFUN(AC_OS_IRIX,
[AC_CHECK_LIB(sun, getmntent, LIBS="$LIBS -lsun")
])dnl
dnl
define(AC_OS_DYNIX,
AC_DEFUN(AC_OS_DYNIX,
[AC_CHECK_LIB(seq, getmntent, LIBS="$LIBS -lseq")
])dnl

580
autoconf.texi
View File

@ -6,8 +6,8 @@
@c @setchapternewpage odd
@c %**end of header
@set EDITION 1.98
@set VERSION 1.98
@set EDITION 1.99
@set VERSION 1.99
@set UPDATED August 1994
@iftex
@ -136,7 +136,8 @@ General Purpose Macros
* Setup:: Controlling Autoconf operation.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* C System Output:: Checking output of C compiler system.
* C Features:: Checking for particular features of C.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -237,7 +238,7 @@ Autoconf imposes some restrictions on the names of macros used with
Autoconf requires GNU @code{m4} in order to generate the scripts. It
uses features that some UNIX versions of @code{m4} do not have. It also
overflows internal limits of some versions of @code{m4}, including GNU
@code{m4} 1.0; so use a later version of GNU @code{m4}.
@code{m4} 1.0; so use version 1.1 or later of GNU @code{m4}.
Autoconf does not work well with GNU C library releases before 1.06.
The GNU C library contains stubs (which always return an error) for
@ -247,8 +248,8 @@ those functions are available. This problem does not exist with
releases 1.06 and later of the GNU C library, which define C
preprocessor macros that the Autoconf macros @code{AC_CHECK_FUNC} and
@code{AC_REPLACE_FUNCS} test, indicating that certain functions are
stubs (@pxref{C Features}, for more information on checking for
functions).
stubs (@pxref{C Features}, for more information on checking
for functions).
@ifinfo
Autoconf was written by David MacKenzie, with help from Franc,ois
@ -753,26 +754,16 @@ what existing GNU programs use. These macros are defined in the file
The following macros check for the presence or behavior of particular
programs:
@defmac AC_PROG_GCC_TRADITIONAL
@maindex PROG_GCC_TRADITIONAL
Add @samp{-traditional} to @code{make} variable @code{CC} if using the
GNU C compiler and @code{ioctl} does not work properly without
@samp{-traditional}. This macro calls @code{AC_PROG_CC} and
@code{AC_PROG_CPP} if they haven't been called already.
@end defmac
@defmac AC_DECL_YYTEXT
@maindex DECL_YYTEXT
@vindex YYTEXT_POINTER
Define @code{YYTEXT_POINTER} if @code{yytext} is a @samp{char *} instead
of a @samp{char []}. This depends on whether @code{lex} or @code{flex}
is being used. This macro calls @code{AC_PROG_CPP} (or
@code{AC_PROG_CXXCPP} if C++ is the current language, @pxref{Language
Choice}) and @code{AC_PROG_LEX} if they haven't been called already.
@defmac AC_PROG_LN_S
@maindex PROG_LN_S
If @samp{ln -s} works on the current filesystem (the operating system
and filesystem support symbolic links), set shell and @code{make}
variable @code{LN_S} to @samp{ln -s}, otherwise set it to @samp{ln}.
@end defmac
@defmac AC_PROG_CC_C_O
@maindex PROG_CC_C_O
@vindex NO_MINUS_C_MINUS_O
If the C compiler does not accept the @samp{-c} and @samp{-o} options
simultaneously, define @code{NO_MINUS_C_MINUS_O}.
This macro replaces @code{AC_DECLARE_YYTEXT}, which didn't work.
@end defmac
@defmac AC_PROG_AWK
@ -789,6 +780,13 @@ If @code{gcc} is found, set @code{make} variable @code{CC} to
set @code{GCC} to be empty.
@end defmac
@defmac AC_PROG_CC_C_O
@maindex PROG_CC_C_O
@vindex NO_MINUS_C_MINUS_O
If the C compiler does not accept the @samp{-c} and @samp{-o} options
simultaneously, define @code{NO_MINUS_C_MINUS_O}.
@end defmac
@defmac AC_PROG_CPP
@maindex PROG_CPP
Set shell and @code{make} variable @code{CPP} to a command that runs the
@ -830,6 +828,14 @@ this macro first if it hasn't been called already. This macro calls
@code{AC_PROG_CXX} if it hasn't been called already.
@end defmac
@defmac AC_PROG_GCC_TRADITIONAL
@maindex PROG_GCC_TRADITIONAL
Add @samp{-traditional} to @code{make} variable @code{CC} if using the
GNU C compiler and @code{ioctl} does not work properly without
@samp{-traditional}. This macro calls @code{AC_PROG_CC} and
@code{AC_PROG_CPP} if they haven't been called already.
@end defmac
@defmac AC_PROG_INSTALL
@maindex PROG_INSTALL
Set @code{make} variable @code{INSTALL} to @samp{install -c} if
@ -858,29 +864,11 @@ standard place. Otherwise set @code{LEX} to @samp{lex} and
@code{LEXLIB} to @samp{-ll}.
@end defmac
@defmac AC_PROG_RANLIB
@maindex PROG_RANLIB
Set @code{make} variable @code{RANLIB} to @samp{ranlib} if @code{ranlib}
is found, otherwise to @samp{:} (do nothing).
@end defmac
@defmac AC_PROG_YACC
@maindex PROG_YACC
If @code{bison} is found, set @code{make} variable @code{YACC} to
@samp{bison -y}. Otherwise, if @code{byacc} is found, set @code{YACC}
to @samp{byacc}. Otherwise set @code{YACC} to @samp{yacc}.
@end defmac
@defmac AC_PROG_RSH
@maindex PROG_RSH
@vindex RSH
@vindex NO_REMOTE
@vindex HAVE_NETDB_H
If a remote shell is available, set @code{make} variable @code{RSH} to
its pathname. Otherwise, if @file{netdb.h} exists (implying the
@code{rexec} function), define @code{HAVE_NETDB_H}. If either is true,
also put @samp{rtapelib.o} in @code{make} variable @code{RTAPELIB}.
Otherwise, define @code{NO_REMOTE}.
@defmac AC_PROG_LN_S
@maindex PROG_LN_S
If @samp{ln -s} works on the current filesystem (the operating system
and filesystem support symbolic links), set shell and @code{make}
variable @code{LN_S} to @samp{ln -s}, otherwise set it to @samp{ln}.
@end defmac
@defmac AC_PROG_MAKE_SET
@ -903,16 +891,29 @@ If you use this macro, simply place a line like this in your
@end example
@end defmac
@defmac AC_DECL_YYTEXT
@maindex DECL_YYTEXT
@vindex YYTEXT_POINTER
Define @code{YYTEXT_POINTER} if @code{yytext} is a @samp{char *} instead
of a @samp{char []}. This depends on whether @code{lex} or @code{flex}
is being used. This macro calls @code{AC_PROG_CPP} (or
@code{AC_PROG_CXXCPP} if C++ is the current language, @pxref{Language
Choice}) and @code{AC_PROG_LEX} if they haven't been called already.
@defmac AC_PROG_RANLIB
@maindex PROG_RANLIB
Set @code{make} variable @code{RANLIB} to @samp{ranlib} if @code{ranlib}
is found, otherwise to @samp{:} (do nothing).
@end defmac
This macro replaces @code{AC_DECLARE_YYTEXT}, which didn't work.
@defmac AC_PROG_RSH
@maindex PROG_RSH
@vindex RSH
@vindex NO_REMOTE
@vindex HAVE_NETDB_H
If a remote shell is available, set @code{make} variable @code{RSH} to
its pathname. Otherwise, if @file{netdb.h} exists (implying the
@code{rexec} function), define @code{HAVE_NETDB_H}. If either is true,
also put @samp{rtapelib.o} in @code{make} variable @code{RTAPELIB}.
Otherwise, define @code{NO_REMOTE}.
@end defmac
@defmac AC_PROG_YACC
@maindex PROG_YACC
If @code{bison} is found, set @code{make} variable @code{YACC} to
@samp{bison -y}. Otherwise, if @code{byacc} is found, set @code{YACC}
to @samp{byacc}. Otherwise set @code{YACC} to @samp{yacc}.
@end defmac
@node Header Files, Typedefs, Alternative Programs, Specific Tests
@ -920,6 +921,14 @@ This macro replaces @code{AC_DECLARE_YYTEXT}, which didn't work.
The following macros check for the presence of certain C header files:
@defmac AC_DECL_SYS_SIGLIST
@maindex DECL_SYS_SIGLIST
@vindex SYS_SIGLIST_DECLARED
Define @code{SYS_SIGLIST_DECLARED} if the variable @code{sys_siglist} is
declared in a system header file, either @file{signal.h} or
@file{unistd.h}.
@end defmac
@defmac AC_DIR_HEADER
@maindex DIR_HEADER
@vindex DIRENT
@ -1024,15 +1033,6 @@ If @file{sys/types.h} does not define @code{major}, @code{minor}, and
@code{MAJOR_IN_SYSMACROS}.
@end defmac
@defmac AC_MEMORY_H
@maindex MEMORY_H
@vindex NEED_MEMORY_H
Define @code{NEED_MEMORY_H} if @code{memcpy}, @code{memcmp}, etc. are
not declared in @file{string.h} and @file{memory.h} exists. This macro
is obsolete; instead, use @code{AC_CHECK_HEADERS(memory.h)}. See the
example for @code{AC_HEADER_STDC}.
@end defmac
@defmac AC_HEADER_STDC
@maindex HEADER_STDC
@vindex STDC_HEADERS
@ -1100,6 +1100,15 @@ on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_MEMORY_H
@maindex MEMORY_H
@vindex NEED_MEMORY_H
Define @code{NEED_MEMORY_H} if @code{memcpy}, @code{memcmp}, etc. are
not declared in @file{string.h} and @file{memory.h} exists. This macro
is obsolete; instead, use @code{AC_CHECK_HEADERS(memory.h)}. See the
example for @code{AC_HEADER_STDC}.
@end defmac
@defmac AC_UNISTD_H
@maindex UNISTD_H
@vindex HAVE_UNISTD_H
@ -1139,14 +1148,6 @@ The symbol @code{USG} is obsolete. Instead of this macro, use
code. See the example for @code{AC_HEADER_STDC}.
@end defmac
@defmac AC_DECL_SYS_SIGLIST
@maindex DECL_SYS_SIGLIST
@vindex SYS_SIGLIST_DECLARED
Define @code{SYS_SIGLIST_DECLARED} if the variable @code{sys_siglist} is
declared in a system header file, either @file{signal.h} or
@file{unistd.h}.
@end defmac
@node Typedefs, Library Functions, Header Files, Specific Tests
@section Typedefs
@ -1391,28 +1392,6 @@ define @code{STAT_MACROS_BROKEN}. This is the case on Tektronix UTekV,
Amdahl UTS and Motorola System V/88.
@end defmac
@defmac AC_STRUCT_ST_BLKSIZE
@maindex STRUCT_ST_BLKSIZE
@vindex HAVE_ST_BLKSIZE
If @code{struct stat} contains an @code{st_blksize} member, define
@code{HAVE_ST_BLKSIZE}.
@end defmac
@defmac AC_STRUCT_ST_BLOCKS
@maindex STRUCT_ST_BLOCKS
@vindex HAVE_ST_BLOCKS
If @code{struct stat} contains an @code{st_blocks} member, define
@code{HAVE_ST_BLOCKS}. Otherwise, add @samp{fileblocks.o} to the
@code{make} variable @code{LIBOBJS}.
@end defmac
@defmac AC_STRUCT_ST_RDEV
@maindex STRUCT_ST_RDEV
@vindex HAVE_ST_RDEV
If @code{struct stat} contains an @code{st_rdev} member, define
@code{HAVE_ST_RDEV}.
@end defmac
@defmac AC_HEADER_TIME
@maindex HEADER_TIME
@vindex TIME_WITH_SYS_TIME
@ -1439,6 +1418,28 @@ example, @code{struct timeval} or @code{struct timezone} as well as
@end example
@end defmac
@defmac AC_STRUCT_ST_BLKSIZE
@maindex STRUCT_ST_BLKSIZE
@vindex HAVE_ST_BLKSIZE
If @code{struct stat} contains an @code{st_blksize} member, define
@code{HAVE_ST_BLKSIZE}.
@end defmac
@defmac AC_STRUCT_ST_BLOCKS
@maindex STRUCT_ST_BLOCKS
@vindex HAVE_ST_BLOCKS
If @code{struct stat} contains an @code{st_blocks} member, define
@code{HAVE_ST_BLOCKS}. Otherwise, add @samp{fileblocks.o} to the
@code{make} variable @code{LIBOBJS}.
@end defmac
@defmac AC_STRUCT_ST_RDEV
@maindex STRUCT_ST_RDEV
@vindex HAVE_ST_RDEV
If @code{struct stat} contains an @code{st_rdev} member, define
@code{HAVE_ST_RDEV}.
@end defmac
@defmac AC_STRUCT_TM
@maindex STRUCT_TM
@vindex TM_IN_SYS_TIME
@ -1472,14 +1473,11 @@ a sequence of arguments with the same type to be accessed as if they
were an array of values.
@end defmac
@defmac AC_C_CROSS
@maindex C_CROSS
If the C compiler being used does not produce executables that can run
on the system where @code{configure} is being run, set the shell
variable @code{cross_compiling} to @samp{yes}, otherwise @samp{no}.
This information can be used by @code{AC_TRY_RUN} to determine whether
to take a default action instead of trying to run a test program
(@pxref{C Features}).
@defmac AC_C_BIGENDIAN
@maindex C_BIGENDIAN
@vindex WORDS_BIGENDIAN
If words are stored with the most significant byte first (like Motorola
and SPARC, but not Intel and VAX, CPUs), define @code{WORDS_BIGENDIAN}.
@end defmac
@defmac AC_C_CHAR_UNSIGNED
@ -1503,6 +1501,16 @@ include it before any other header files, to prevent inconsistencies in
declarations.)
@end defmac
@defmac AC_C_CROSS
@maindex C_CROSS
If the C compiler being used does not produce executables that can run
on the system where @code{configure} is being run, set the shell
variable @code{cross_compiling} to @samp{yes}, otherwise @samp{no}.
This information can be used by @code{AC_TRY_RUN} to determine whether
to take a default action instead of trying to run a test program
(@pxref{C System Output}).
@end defmac
@defmac AC_C_INLINE
@maindex C_INLINE
@vindex inline
@ -1537,18 +1545,20 @@ If the C compiler supports the @code{long double} type, define
that define @code{__STDC__} do not support @code{long double}.
@end defmac
@defmac AC_C_BIGENDIAN
@maindex C_BIGENDIAN
@vindex WORDS_BIGENDIAN
If words are stored with the most significant byte first (like Motorola
and SPARC, but not Intel and VAX, CPUs), define @code{WORDS_BIGENDIAN}.
@end defmac
@node System Services, UNIX Variants, Compiler Characteristics, Specific Tests
@section System Services
The following macros check for operating system services:
@defmac AC_HAVE_POUNDBANG (@var{action-if-supported} @r{[},
@var{action-if-not-supported}@r{]})
@maindex HAVE_POUNDBANG
Check whether the system supports starting shell scripts with a line of
the form @samp{#!/bin/csh} to select the shell to use. If @samp{#!}
works, execute shell commands @var{action-if-supported}; if not, execute
@var{action-if-not-supported}.
@end defmac
@defmac AC_PATH_X
@maindex PATH_X
Try to locate the X Window System include files and libraries. Try
@ -1582,15 +1592,6 @@ been called. Because of the macro dependencies, if you call this macro,
you should let it call @code{AC_PATH_X} rather than doing that yourself.
@end defmac
@defmac AC_HAVE_POUNDBANG (@var{action-if-supported} @r{[},
@var{action-if-not-supported}@r{]})
@maindex HAVE_POUNDBANG
Check whether the system supports starting shell scripts with a line of
the form @samp{#!/bin/csh} to select the shell to use. If @samp{#!}
works, execute shell commands @var{action-if-supported}; if not, execute
@var{action-if-not-supported}.
@end defmac
@defmac AC_SYS_LONG_FILE_NAMES
@maindex SYS_LONG_FILE_NAMES
@vindex HAVE_LONG_FILE_NAMES
@ -1717,7 +1718,8 @@ These macros are defined in the file @file{acgeneral.m4}.
@menu
* Setup:: Controlling Autoconf operation.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* C System Output:: Checking output of C compiler system.
* C Features:: Checking for particular features of C.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -1806,6 +1808,18 @@ make sure that the directory that it is told contains the source code in
fact does (@pxref{Invoking configure}, for more information).
@end defmac
@defmac AC_INIT_PREPARE (@var{unique-file-in-source-dir})
@maindex INIT_PREPARE
Find the source code directory and set up shell variables necessary for
other Autoconf macros to work. @var{unique-file-in-source-dir} is some
file that is in the package's source directory; @code{configure} checks
for this file's existence to make sure that the directory that it is
told contains the source code in fact does (@pxref{Invoking configure},
for more information). @code{AC_INIT_PREPARE} is the last thing done by
@code{AC_INIT}. Use @code{AC_INIT_PREPARE} instead of @code{AC_INIT} if you
want to do argument parsing yourself; never use both.
@end defmac
@defmac AC_OUTPUT (@r{[}@var{file}@dots{}@r{] [,}@var{extra-cmds}@r{]})
@maindex OUTPUT
Create output files (typically one or more @file{Makefile}s) and
@ -1830,6 +1844,12 @@ If you pass @var{extra-cmds}, those commands will be inserted into
@file{config.status} to be run after all its other processing.
@end defmac
@defmac AC_PREFIX (@var{program})
@maindex PREFIX
This macro is like @code{AC_PREFIX_PROGRAM}, except that it does not
find the site-wide defaults file correctly, so it is obsolete.
@end defmac
@defmac AC_PREFIX_PROGRAM (@var{program})
@maindex PREFIX_PROGRAM
If the user did not specify an installation prefix (using the
@ -1842,18 +1862,6 @@ is found, set the prefix to the parent of the directory containing
set the prefix to @file{/usr/local/gnu}.
@end defmac
@defmac AC_INIT_PREPARE (@var{unique-file-in-source-dir})
@maindex INIT_PREPARE
Find the source code directory and set up shell variables necessary for
other Autoconf macros to work. @var{unique-file-in-source-dir} is some
file that is in the package's source directory; @code{configure} checks
for this file's existence to make sure that the directory that it is
told contains the source code in fact does (@pxref{Invoking configure},
for more information). @code{AC_INIT_PREPARE} is the last thing done by
@code{AC_INIT}. Use @code{AC_INIT_PREPARE} instead of @code{AC_INIT} if you
want to do argument parsing yourself; never use both.
@end defmac
@defmac AC_PREREQ (@var{version})
@maindex PREREQ
Ensure that a recent enough version of Autoconf is being used. If the
@ -1899,10 +1907,12 @@ produces this in @file{configure}:
@end example
@end defmac
@node File Existence, C Features, Setup, General Purpose Macros
@node File Existence, C System Output, Setup, General Purpose Macros
@section Checking Whether Particular Files Exist
These macros check whether particular files exist.
These macros check whether particular files exist. They cache the
results of their tests for future use (@pxref{Caching Values}, for more
information).
@defmac AC_CHECK_LIB (@var{library}, @var{function}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex CHECK_LIB
@ -1928,20 +1938,6 @@ present, because linking the test program will always fail with
unresolved symbols.
@end defmac
@defmac AC_HAVE_LIBRARY (@var{library}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex HAVE_LIBRARY
This macro is equivalent to calling @code{AC_CHECK_LIB} with a
@var{function} argument of @code{main}. It is considered obsolete,
because some linkers (e.g., Apollo's) do not fail when asked to link
with a nonexistent library if there are no unresolved sybols.
@end defmac
@defmac AC_PREFIX (@var{program})
@maindex PREFIX
This macro is like @code{AC_PREFIX_PROGRAM}, except that it prevents
finding the site-wide defaults file correctly, so it is obsolete.
@end defmac
@defmac AC_CHECK_PROG (@var{variable}, @var{prog-to-check-for}, @var{value-if-found} @r{[}, @var{value-if-not-found}@r{]})
@maindex CHECK_PROG
Check whether program @var{prog-to-check-for} exists in @code{PATH}. If
@ -1950,14 +1946,6 @@ it is found, set @var{variable} to @var{value-if-found}, otherwise to
do nothing. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PATH_PROG (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PATH_PROG
Similar to @code{AC_CHECK_PROG}, but set @var{variable} to the entire
path of @var{prog-to-check-for} if found. Otherwise, set @var{variable}
to @var{value-if-not-found}, if given. If @var{variable} was already
set, do nothing. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_CHECK_PROGS (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex CHECK_PROGS
Check for each program in the whitespace-separated list
@ -1969,6 +1957,22 @@ list are found, set @var{variable} to @var{value-if-not-found}; if
is not changed. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_HAVE_LIBRARY (@var{library}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex HAVE_LIBRARY
This macro is equivalent to calling @code{AC_CHECK_LIB} with a
@var{function} argument of @code{main}. It is considered obsolete,
because some linkers (e.g., Apollo's) do not fail when asked to link
with a nonexistent library if there are no unresolved sybols.
@end defmac
@defmac AC_PATH_PROG (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PATH_PROG
Similar to @code{AC_CHECK_PROG}, but set @var{variable} to the entire
path of @var{prog-to-check-for} if found. Otherwise, set @var{variable}
to @var{value-if-not-found}, if given. If @var{variable} was already
set, do nothing. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PATH_PROGS (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PATH_PROGS
Like @code{AC_CHECK_PROGS}, but if any of @var{progs-to-check-for}
@ -1976,17 +1980,15 @@ are found, set @var{variable} to the entire pathname of the program
found.
@end defmac
@node C Features, Command Line, File Existence, General Purpose Macros
@section Checking For C Features
@node C System Output, C Features, File Existence, General Purpose Macros
@section Checking C Compiler System Output
These macros check for features of the C compiler, libraries, and headers.
@defmac AC_CHECK_TYPE (@var{type}, @var{default})
@maindex CHECK_TYPE
If the type @var{type} is not defined in @file{sys/types.h}, define it
to be the C (or C++) builtin type @var{default}, e.g. @samp{short} or
@samp{unsigned}.
@end defmac
These macros check the output of the C compiler system. They @emph{do
not} cache the results of their tests for future use (@pxref{Caching
Values}), because they don't know enough about the information they are
checking for to generate a cache variable name. The checks for
particular kinds of C features call these macros and do cache their
results (@pxref{C Features}).
@defmac AC_COMPILE_CHECK (@var{echo-text}, @var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex COMPILE_CHECK
@ -1994,41 +1996,19 @@ This is an obsolete alias for @code{AC_TRY_LINK}, with the addition that it
prints @samp{checking for @var{echo-text}} to the standard output first.
@end defmac
@defmac AC_CHECK_FUNC (@var{function}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_FUNC
If @var{function} is available, run shell commands
@var{action-if-found}, otherwise @var{action-if-not-found}. If the
functions might be in libraries other than the default C library, first
call @code{AC_CHECK_LIB} for those libraries. If you just want to
define a symbol if the function is available, consider using
@code{AC_CHECK_FUNCS} instead.
@end defmac
@defmac AC_EGREP_CPP (@var{pattern}, @var{program}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex EGREP_CPP
@var{program} is the text of a C or C++ program, on which shell variable and
backquote substitutions are performed. If the output of running the
preprocessor on @var{program} contains the @code{egrep} regular
expression @var{pattern}, execute shell commands @var{action-if-found},
otherwise execute @var{action-if-not-found}. (It is an unfortunate
oversight that we use the word @code{PROGRAM} in Autoconf macro names to
sometimes mean C or C++ source code and sometimes mean a UNIX command.)
@defmac AC_CHECK_FUNCS (@var{function}@dots{})
@maindex CHECK_FUNCS
@vindex HAVE_@var{function}
For each given @var{function} in the whitespace-separated argument list
that is available, define @code{HAVE_@var{function}} (in all caps).
@xref{Specific Tests}, for a precise definition of ``define'' as it
is used here. If the functions might be in libraries other than the
default C library, first call @code{AC_CHECK_LIB} for those libraries.
@end defmac
@defmac AC_CHECK_HEADERS (@var{header-file}@dots{})
@maindex CHECK_HEADERS
@vindex HAVE_@var{header}
For each given system header file @var{header-file} in the
whitespace-separated argument list that exists, define
@code{HAVE_@var{header-file}} (in all caps). @xref{Specific Tests}, for
a precise definition of ``define'' as it is used here.
@end defmac
@defmac AC_CHECK_HEADER (@var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_HEADER
If the system header file @var{header-file} exists, execute shell commands
@var{action-if-found}, otherwise execute @var{action-if-not-found}. If
you just want to define a symbol if the header file is available,
consider using @code{AC_CHECK_HEADERS} instead.
This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_EGREP_HEADER (@var{pattern}, @var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@ -2049,44 +2029,6 @@ almost always detect them by simply using @code{#ifdef} directives in
your programs.
@end defmac
@defmac AC_EGREP_CPP (@var{pattern}, @var{program}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex EGREP_CPP
@var{program} is the text of a C or C++ program, on which shell variable and
backquote substitutions are performed. If the output of running the
preprocessor on @var{program} contains the @code{egrep} regular
expression @var{pattern}, execute shell commands @var{action-if-found},
otherwise execute @var{action-if-not-found}. (It is an unfortunate
oversight that we use the word @code{PROGRAM} in Autoconf macro names to
sometimes mean C or C++ source code and sometimes mean a UNIX command.)
This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_REPLACE_FUNCS (@var{function-name}@dots{})
@maindex REPLACE_FUNCS
For each given @var{function-name} in the whitespace-separated argument
list that is not in the C library, add @samp{@var{function-name}.o} to
the value of the @code{make} variable @code{LIBOBJS}. If the functions
might be in libraries other than the default C library, first call
@code{AC_CHECK_LIB} for those libraries.
@end defmac
@defmac AC_CHECK_SIZEOF (@var{type})
@maindex CHECK_SIZEOF
Define @code{SIZEOF_@var{uctype}} to be the size in bytes of the C (or
C++) builtin type @var{type}, e.g. @samp{int} or @samp{char *}. If
@samp{type} is unknown to the compiler, gets a size of 0. @var{uctype}
is @var{type}, with lowercase converted to uppercase, spaces changed to
underscores, and asterisks changed to @samp{P}. For example, the call
@example
AC_CHECK_SIZEOF(int *)
@end example
@noindent
defines @code{SIZEOF_INT_P} to be 8 on DEC Alpha AXP systems.
@end defmac
@defmac AC_TRY_CPP (@var{includes}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex TRY_CPP
@var{includes} is C or C++ @code{#include} statements and declarations, on
@ -2133,6 +2075,80 @@ It is preferable to use @code{AC_TRY_LINK} instead of @code{AC_TRY_RUN},
when possible. @xref{Test Programs}, for more information.
@end defmac
@node C Features, Command Line, C System Output, General Purpose Macros
@section Checking For C Features
These macros check for particular kinds of features of the C compiler,
libraries, and headers. They cache the results of their tests for
future use (@pxref{Caching Values}, for more information).
@defmac AC_CHECK_FUNC (@var{function}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_FUNC
If @var{function} is available, run shell commands
@var{action-if-found}, otherwise @var{action-if-not-found}. If the
functions might be in libraries other than the default C library, first
call @code{AC_CHECK_LIB} for those libraries. If you just want to
define a symbol if the function is available, consider using
@code{AC_CHECK_FUNCS} instead.
@end defmac
@defmac AC_CHECK_FUNCS (@var{function}@dots{})
@maindex CHECK_FUNCS
@vindex HAVE_@var{function}
For each given @var{function} in the whitespace-separated argument list
that is available, define @code{HAVE_@var{function}} (in all caps).
@xref{Specific Tests}, for a precise definition of ``define'' as it
is used here. If the functions might be in libraries other than the
default C library, first call @code{AC_CHECK_LIB} for those libraries.
@end defmac
@defmac AC_CHECK_HEADER (@var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_HEADER
If the system header file @var{header-file} exists, execute shell commands
@var{action-if-found}, otherwise execute @var{action-if-not-found}. If
you just want to define a symbol if the header file is available,
consider using @code{AC_CHECK_HEADERS} instead.
@end defmac
@defmac AC_CHECK_HEADERS (@var{header-file}@dots{})
@maindex CHECK_HEADERS
@vindex HAVE_@var{header}
For each given system header file @var{header-file} in the
whitespace-separated argument list that exists, define
@code{HAVE_@var{header-file}} (in all caps). @xref{Specific Tests}, for
a precise definition of ``define'' as it is used here.
@end defmac
@defmac AC_CHECK_SIZEOF (@var{type})
@maindex CHECK_SIZEOF
Define @code{SIZEOF_@var{uctype}} to be the size in bytes of the C (or
C++) builtin type @var{type}, e.g. @samp{int} or @samp{char *}. If
@samp{type} is unknown to the compiler, gets a size of 0. @var{uctype}
is @var{type}, with lowercase converted to uppercase, spaces changed to
underscores, and asterisks changed to @samp{P}. For example, the call
@example
AC_CHECK_SIZEOF(int *)
@end example
@noindent
defines @code{SIZEOF_INT_P} to be 8 on DEC Alpha AXP systems.
@end defmac
@defmac AC_CHECK_TYPE (@var{type}, @var{default})
@maindex CHECK_TYPE
If the type @var{type} is not defined in @file{sys/types.h}, define it
to be the C (or C++) builtin type @var{default}, e.g. @samp{short} or
@samp{unsigned}.
@end defmac
@defmac AC_REPLACE_FUNCS (@var{function-name}@dots{})
@maindex REPLACE_FUNCS
For each given @var{function-name} in the whitespace-separated argument
list that is not in the C library, add @samp{@var{function-name}.o} to
the value of the @code{make} variable @code{LIBOBJS}. If the functions
might be in libraries other than the default C library, first call
@code{AC_CHECK_LIB} for those libraries.
@end defmac
@node Command Line, Setting Variables, C Features, General Purpose Macros
@section Checking Command Line Arguments
@ -2360,7 +2376,13 @@ callers change automatically.
@defmac AC_CHECKING (@var{feature-description})
@maindex CHECKING
This macro is similar to @code{AC_MSG_CHECKING}, except that it prints a
newline after the @var{feature-description}. It is considered obsolete.
newline after the @var{feature-description}. It is useful mainly to
print a general description of the overall purpose of a group of feature
checks, e.g.
@example
AC_CHECKING(if stack overflow is detectable)
@end example
@end defmac
@defmac AC_MSG_CHECKING (@var{feature-description})
@ -2476,8 +2498,9 @@ called in the correct order.
Make @code{m4} print a warning message on the standard error output if
@var{called-macro-name} has already been called. @var{this-macro-name}
should be the name of the macro that is calling @code{AC_BEFORE}. The
macro @var{called-macro-name} must contain a call to @code{AC_PROVIDE}
to indicate that it has been called.
macro @var{called-macro-name} must have been defined using
@code{AC_DEFUN} or else contain a call to @code{AC_PROVIDE} to indicate
that it has been called.
This macro should be used when one macro makes changes that might affect
another macro, so that the other macro should probably not be called
@ -2513,8 +2536,10 @@ AC_OBSOLETE([$0], [; use AC_CHECK_HEADERS(unistd.h) instead])
@defmac AC_PROVIDE (@var{macro-name})
@maindex PROVIDE
Set a flag recording that @var{macro-name} has been called. The
argument should be the name of the macro that is calling
Set a flag recording that @var{macro-name} has been called. This macro
is called automatically when using @code{AC_DEFUN} to define a macro.
The argument should be the name of the macro that is calling
@code{AC_PROVIDE}. An easy way to get it is from the @code{m4} builtin
variable @code{$0}, like this:
@ -2527,13 +2552,14 @@ AC_PROVIDE([$0])
@maindex REQUIRE
If the @code{m4} macro @var{macro-name} has not already been called,
call it (without any arguments). Make sure to quote @var{macro-name}
with square brackets. The body of @var{macro-name} must contain a call
to @code{AC_PROVIDE} to indicate that it has been called.
with square brackets. The body of @var{macro-name} must have been
defined using @code{AC_DEFUN} or else contain a call to
@code{AC_PROVIDE} to indicate that it has been called.
Macros that need some other macro to be called before they are called
can use @code{AC_REQUIRE} to ensure that it has been, in case the person
who made @file{configure.in} forgot or didn't know to do it.
@code{AC_REQUIRE} and @code{AC_PROVIDE} together can ensure that a macro
@code{AC_REQUIRE} can ensure that a macro
is only called if it is needed, and only called once.
@xref{Dependencies Between Macros}, for more information.
@end defmac
@ -2690,11 +2716,17 @@ number, which you can get by running @samp{autoconf --version}.
@node Macro Format, Macro Naming, , Writing Macros
@section Macro Format
Autoconf macros are defined as arguments to the @code{m4} builtin
command @code{define}. Their overall structure looks like this:
@maindex DEFUN
Autoconf macros are defined as arguments to the @code{AC_DEFUN} macro,
which is similar to the @code{m4} builtin @code{define} macro. In
addition to defining the macro, @code{AC_DEFUN} causes the macro, when
it is called, to set a flag which is used to constrain the order in
which macros are called (@pxref{Prerequisite Macros}).
An Autoconf macro definition looks like this:
@example
define(@var{macro-name}, [@var{macro-body}])dnl
AC_DEFUN(@var{macro-name}, [@var{macro-body}])dnl
@end example
@noindent
@ -2828,10 +2860,10 @@ that uses the C preprocessor, it depends on @code{AC_PROG_CPP} having
been called first to set the shell variable @code{CPP}
(@pxref{Alternative Programs}).
Rather than forcing the user of the macros to keep track of all of the
dependencies between them, you can use the macros @code{AC_PROVIDE} and
@code{AC_REQUIRE} to do it automatically. @xref{Macro Ordering}, for more
information on their syntax.
Rather than forcing the user of the macros to keep track of the
dependencies between them, you can use the @code{AC_REQUIRE} macro to do
it automatically. @xref{Macro Ordering}, for more information on its
syntax.
The new macro that runs the C preprocessor should contain, somewhere
before @code{CPP} is used, the statement
@ -2840,17 +2872,11 @@ before @code{CPP} is used, the statement
AC_REQUIRE([AC_PROG_CPP])
@end example
@noindent
and the macro @code{AC_PROG_CPP} should contain the statement (anywhere
in its body)
@example
AC_PROVIDE([$0])
@end example
@noindent
Then, when the new macro is run, it will invoke @code{AC_PROG_CPP} if
and only if @code{AC_PROG_CPP} has not already been run.
The macro @code{AC_PROG_CPP} should be defined using @code{AC_DEFUN},
which as well as defining the macro, causes it to set a flag when it is
called. Then, when the new macro is run, it will invoke
@code{AC_PROG_CPP} if and only if @code{AC_PROG_CPP} has not already
been run.
@node Suggested Ordering, , Prerequisite Macros, Dependencies Between Macros
@subsection Suggested Ordering
@ -2870,8 +2896,7 @@ not when running @file{configure}. It is not a fatal error;
The @code{AC_BEFORE} macro causes @code{m4} to print a warning message
on the standard error output when a macro is used before another macro
which might change its behavior. The macro which should come first
should contain a call to @code{AC_BEFORE} and the macro which should
come later should contain a call to @code{AC_PROVIDE}.
should contain a call to @code{AC_BEFORE}.
For example, @code{AC_OS_AIX} contains
@ -2879,13 +2904,6 @@ For example, @code{AC_OS_AIX} contains
AC_BEFORE([$0], [AC_TRY_LINK])
@end example
@noindent
and @code{AC_TRY_LINK} contains
@example
AC_PROVIDE([$0])
@end example
@noindent
As a result, if @code{AC_OS_AIX} is called after @code{AC_TRY_LINK},
it will note that @code{AC_TRY_LINK} has already been called and
@ -2912,11 +2930,11 @@ Do not use @samp{test -x}, because 4.3BSD does not have it. Use
If you need to check whether a symbol is defined in a C header file, you
can use @code{AC_EGREP_HEADER} if the symbol is not a C preprocessor
macro (@pxref{C Features}), or compile a small test program that includes
the file and references the symbol (@pxref{Test Programs}). Don't
directly @code{grep} for the symbol in the file, because on some systems
it might be defined in another header file that the file you are
checking @samp{#include}s.
macro (@pxref{C System Output}), or compile a small test program
that includes the file and references the symbol (@pxref{Test
Programs}). Don't directly @code{grep} for the symbol in the file,
because on some systems it might be defined in another header file that
the file you are checking @samp{#include}s.
However, if you need to check for a particular UNIX variant which is
distinguished by having certain text in a certain file, then use
@ -2959,9 +2977,9 @@ than scanning the libraries.
If you need to check for a condition other than whether some symbol
exists on the system or has a certain value, then you can't use
@code{AC_TRY_LINK} (@pxref{C Features}). You have to write a
@code{AC_TRY_LINK} (@pxref{C System Output}). You have to write a
test program by hand. You can compile and run it using
@code{AC_TRY_RUN} (@pxref{C Features}).
@code{AC_TRY_RUN} (@pxref{C System Output}).
Try to avoid running test programs if possible, because using them
prevents people from configuring your package for cross-compiling. If

580
doc/autoconf.texi
View File

@ -6,8 +6,8 @@
@c @setchapternewpage odd
@c %**end of header
@set EDITION 1.98
@set VERSION 1.98
@set EDITION 1.99
@set VERSION 1.99
@set UPDATED August 1994
@iftex
@ -136,7 +136,8 @@ General Purpose Macros
* Setup:: Controlling Autoconf operation.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* C System Output:: Checking output of C compiler system.
* C Features:: Checking for particular features of C.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -237,7 +238,7 @@ Autoconf imposes some restrictions on the names of macros used with
Autoconf requires GNU @code{m4} in order to generate the scripts. It
uses features that some UNIX versions of @code{m4} do not have. It also
overflows internal limits of some versions of @code{m4}, including GNU
@code{m4} 1.0; so use a later version of GNU @code{m4}.
@code{m4} 1.0; so use version 1.1 or later of GNU @code{m4}.
Autoconf does not work well with GNU C library releases before 1.06.
The GNU C library contains stubs (which always return an error) for
@ -247,8 +248,8 @@ those functions are available. This problem does not exist with
releases 1.06 and later of the GNU C library, which define C
preprocessor macros that the Autoconf macros @code{AC_CHECK_FUNC} and
@code{AC_REPLACE_FUNCS} test, indicating that certain functions are
stubs (@pxref{C Features}, for more information on checking for
functions).
stubs (@pxref{C Features}, for more information on checking
for functions).
@ifinfo
Autoconf was written by David MacKenzie, with help from Franc,ois
@ -753,26 +754,16 @@ what existing GNU programs use. These macros are defined in the file
The following macros check for the presence or behavior of particular
programs:
@defmac AC_PROG_GCC_TRADITIONAL
@maindex PROG_GCC_TRADITIONAL
Add @samp{-traditional} to @code{make} variable @code{CC} if using the
GNU C compiler and @code{ioctl} does not work properly without
@samp{-traditional}. This macro calls @code{AC_PROG_CC} and
@code{AC_PROG_CPP} if they haven't been called already.
@end defmac
@defmac AC_DECL_YYTEXT
@maindex DECL_YYTEXT
@vindex YYTEXT_POINTER
Define @code{YYTEXT_POINTER} if @code{yytext} is a @samp{char *} instead
of a @samp{char []}. This depends on whether @code{lex} or @code{flex}
is being used. This macro calls @code{AC_PROG_CPP} (or
@code{AC_PROG_CXXCPP} if C++ is the current language, @pxref{Language
Choice}) and @code{AC_PROG_LEX} if they haven't been called already.
@defmac AC_PROG_LN_S
@maindex PROG_LN_S
If @samp{ln -s} works on the current filesystem (the operating system
and filesystem support symbolic links), set shell and @code{make}
variable @code{LN_S} to @samp{ln -s}, otherwise set it to @samp{ln}.
@end defmac
@defmac AC_PROG_CC_C_O
@maindex PROG_CC_C_O
@vindex NO_MINUS_C_MINUS_O
If the C compiler does not accept the @samp{-c} and @samp{-o} options
simultaneously, define @code{NO_MINUS_C_MINUS_O}.
This macro replaces @code{AC_DECLARE_YYTEXT}, which didn't work.
@end defmac
@defmac AC_PROG_AWK
@ -789,6 +780,13 @@ If @code{gcc} is found, set @code{make} variable @code{CC} to
set @code{GCC} to be empty.
@end defmac
@defmac AC_PROG_CC_C_O
@maindex PROG_CC_C_O
@vindex NO_MINUS_C_MINUS_O
If the C compiler does not accept the @samp{-c} and @samp{-o} options
simultaneously, define @code{NO_MINUS_C_MINUS_O}.
@end defmac
@defmac AC_PROG_CPP
@maindex PROG_CPP
Set shell and @code{make} variable @code{CPP} to a command that runs the
@ -830,6 +828,14 @@ this macro first if it hasn't been called already. This macro calls
@code{AC_PROG_CXX} if it hasn't been called already.
@end defmac
@defmac AC_PROG_GCC_TRADITIONAL
@maindex PROG_GCC_TRADITIONAL
Add @samp{-traditional} to @code{make} variable @code{CC} if using the
GNU C compiler and @code{ioctl} does not work properly without
@samp{-traditional}. This macro calls @code{AC_PROG_CC} and
@code{AC_PROG_CPP} if they haven't been called already.
@end defmac
@defmac AC_PROG_INSTALL
@maindex PROG_INSTALL
Set @code{make} variable @code{INSTALL} to @samp{install -c} if
@ -858,29 +864,11 @@ standard place. Otherwise set @code{LEX} to @samp{lex} and
@code{LEXLIB} to @samp{-ll}.
@end defmac
@defmac AC_PROG_RANLIB
@maindex PROG_RANLIB
Set @code{make} variable @code{RANLIB} to @samp{ranlib} if @code{ranlib}
is found, otherwise to @samp{:} (do nothing).
@end defmac
@defmac AC_PROG_YACC
@maindex PROG_YACC
If @code{bison} is found, set @code{make} variable @code{YACC} to
@samp{bison -y}. Otherwise, if @code{byacc} is found, set @code{YACC}
to @samp{byacc}. Otherwise set @code{YACC} to @samp{yacc}.
@end defmac
@defmac AC_PROG_RSH
@maindex PROG_RSH
@vindex RSH
@vindex NO_REMOTE
@vindex HAVE_NETDB_H
If a remote shell is available, set @code{make} variable @code{RSH} to
its pathname. Otherwise, if @file{netdb.h} exists (implying the
@code{rexec} function), define @code{HAVE_NETDB_H}. If either is true,
also put @samp{rtapelib.o} in @code{make} variable @code{RTAPELIB}.
Otherwise, define @code{NO_REMOTE}.
@defmac AC_PROG_LN_S
@maindex PROG_LN_S
If @samp{ln -s} works on the current filesystem (the operating system
and filesystem support symbolic links), set shell and @code{make}
variable @code{LN_S} to @samp{ln -s}, otherwise set it to @samp{ln}.
@end defmac
@defmac AC_PROG_MAKE_SET
@ -903,16 +891,29 @@ If you use this macro, simply place a line like this in your
@end example
@end defmac
@defmac AC_DECL_YYTEXT
@maindex DECL_YYTEXT
@vindex YYTEXT_POINTER
Define @code{YYTEXT_POINTER} if @code{yytext} is a @samp{char *} instead
of a @samp{char []}. This depends on whether @code{lex} or @code{flex}
is being used. This macro calls @code{AC_PROG_CPP} (or
@code{AC_PROG_CXXCPP} if C++ is the current language, @pxref{Language
Choice}) and @code{AC_PROG_LEX} if they haven't been called already.
@defmac AC_PROG_RANLIB
@maindex PROG_RANLIB
Set @code{make} variable @code{RANLIB} to @samp{ranlib} if @code{ranlib}
is found, otherwise to @samp{:} (do nothing).
@end defmac
This macro replaces @code{AC_DECLARE_YYTEXT}, which didn't work.
@defmac AC_PROG_RSH
@maindex PROG_RSH
@vindex RSH
@vindex NO_REMOTE
@vindex HAVE_NETDB_H
If a remote shell is available, set @code{make} variable @code{RSH} to
its pathname. Otherwise, if @file{netdb.h} exists (implying the
@code{rexec} function), define @code{HAVE_NETDB_H}. If either is true,
also put @samp{rtapelib.o} in @code{make} variable @code{RTAPELIB}.
Otherwise, define @code{NO_REMOTE}.
@end defmac
@defmac AC_PROG_YACC
@maindex PROG_YACC
If @code{bison} is found, set @code{make} variable @code{YACC} to
@samp{bison -y}. Otherwise, if @code{byacc} is found, set @code{YACC}
to @samp{byacc}. Otherwise set @code{YACC} to @samp{yacc}.
@end defmac
@node Header Files, Typedefs, Alternative Programs, Specific Tests
@ -920,6 +921,14 @@ This macro replaces @code{AC_DECLARE_YYTEXT}, which didn't work.
The following macros check for the presence of certain C header files:
@defmac AC_DECL_SYS_SIGLIST
@maindex DECL_SYS_SIGLIST
@vindex SYS_SIGLIST_DECLARED
Define @code{SYS_SIGLIST_DECLARED} if the variable @code{sys_siglist} is
declared in a system header file, either @file{signal.h} or
@file{unistd.h}.
@end defmac
@defmac AC_DIR_HEADER
@maindex DIR_HEADER
@vindex DIRENT
@ -1024,15 +1033,6 @@ If @file{sys/types.h} does not define @code{major}, @code{minor}, and
@code{MAJOR_IN_SYSMACROS}.
@end defmac
@defmac AC_MEMORY_H
@maindex MEMORY_H
@vindex NEED_MEMORY_H
Define @code{NEED_MEMORY_H} if @code{memcpy}, @code{memcmp}, etc. are
not declared in @file{string.h} and @file{memory.h} exists. This macro
is obsolete; instead, use @code{AC_CHECK_HEADERS(memory.h)}. See the
example for @code{AC_HEADER_STDC}.
@end defmac
@defmac AC_HEADER_STDC
@maindex HEADER_STDC
@vindex STDC_HEADERS
@ -1100,6 +1100,15 @@ on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_MEMORY_H
@maindex MEMORY_H
@vindex NEED_MEMORY_H
Define @code{NEED_MEMORY_H} if @code{memcpy}, @code{memcmp}, etc. are
not declared in @file{string.h} and @file{memory.h} exists. This macro
is obsolete; instead, use @code{AC_CHECK_HEADERS(memory.h)}. See the
example for @code{AC_HEADER_STDC}.
@end defmac
@defmac AC_UNISTD_H
@maindex UNISTD_H
@vindex HAVE_UNISTD_H
@ -1139,14 +1148,6 @@ The symbol @code{USG} is obsolete. Instead of this macro, use
code. See the example for @code{AC_HEADER_STDC}.
@end defmac
@defmac AC_DECL_SYS_SIGLIST
@maindex DECL_SYS_SIGLIST
@vindex SYS_SIGLIST_DECLARED
Define @code{SYS_SIGLIST_DECLARED} if the variable @code{sys_siglist} is
declared in a system header file, either @file{signal.h} or
@file{unistd.h}.
@end defmac
@node Typedefs, Library Functions, Header Files, Specific Tests
@section Typedefs
@ -1391,28 +1392,6 @@ define @code{STAT_MACROS_BROKEN}. This is the case on Tektronix UTekV,
Amdahl UTS and Motorola System V/88.
@end defmac
@defmac AC_STRUCT_ST_BLKSIZE
@maindex STRUCT_ST_BLKSIZE
@vindex HAVE_ST_BLKSIZE
If @code{struct stat} contains an @code{st_blksize} member, define
@code{HAVE_ST_BLKSIZE}.
@end defmac
@defmac AC_STRUCT_ST_BLOCKS
@maindex STRUCT_ST_BLOCKS
@vindex HAVE_ST_BLOCKS
If @code{struct stat} contains an @code{st_blocks} member, define
@code{HAVE_ST_BLOCKS}. Otherwise, add @samp{fileblocks.o} to the
@code{make} variable @code{LIBOBJS}.
@end defmac
@defmac AC_STRUCT_ST_RDEV
@maindex STRUCT_ST_RDEV
@vindex HAVE_ST_RDEV
If @code{struct stat} contains an @code{st_rdev} member, define
@code{HAVE_ST_RDEV}.
@end defmac
@defmac AC_HEADER_TIME
@maindex HEADER_TIME
@vindex TIME_WITH_SYS_TIME
@ -1439,6 +1418,28 @@ example, @code{struct timeval} or @code{struct timezone} as well as
@end example
@end defmac
@defmac AC_STRUCT_ST_BLKSIZE
@maindex STRUCT_ST_BLKSIZE
@vindex HAVE_ST_BLKSIZE
If @code{struct stat} contains an @code{st_blksize} member, define
@code{HAVE_ST_BLKSIZE}.
@end defmac
@defmac AC_STRUCT_ST_BLOCKS
@maindex STRUCT_ST_BLOCKS
@vindex HAVE_ST_BLOCKS
If @code{struct stat} contains an @code{st_blocks} member, define
@code{HAVE_ST_BLOCKS}. Otherwise, add @samp{fileblocks.o} to the
@code{make} variable @code{LIBOBJS}.
@end defmac
@defmac AC_STRUCT_ST_RDEV
@maindex STRUCT_ST_RDEV
@vindex HAVE_ST_RDEV
If @code{struct stat} contains an @code{st_rdev} member, define
@code{HAVE_ST_RDEV}.
@end defmac
@defmac AC_STRUCT_TM
@maindex STRUCT_TM
@vindex TM_IN_SYS_TIME
@ -1472,14 +1473,11 @@ a sequence of arguments with the same type to be accessed as if they
were an array of values.
@end defmac
@defmac AC_C_CROSS
@maindex C_CROSS
If the C compiler being used does not produce executables that can run
on the system where @code{configure} is being run, set the shell
variable @code{cross_compiling} to @samp{yes}, otherwise @samp{no}.
This information can be used by @code{AC_TRY_RUN} to determine whether
to take a default action instead of trying to run a test program
(@pxref{C Features}).
@defmac AC_C_BIGENDIAN
@maindex C_BIGENDIAN
@vindex WORDS_BIGENDIAN
If words are stored with the most significant byte first (like Motorola
and SPARC, but not Intel and VAX, CPUs), define @code{WORDS_BIGENDIAN}.
@end defmac
@defmac AC_C_CHAR_UNSIGNED
@ -1503,6 +1501,16 @@ include it before any other header files, to prevent inconsistencies in
declarations.)
@end defmac
@defmac AC_C_CROSS
@maindex C_CROSS
If the C compiler being used does not produce executables that can run
on the system where @code{configure} is being run, set the shell
variable @code{cross_compiling} to @samp{yes}, otherwise @samp{no}.
This information can be used by @code{AC_TRY_RUN} to determine whether
to take a default action instead of trying to run a test program
(@pxref{C System Output}).
@end defmac
@defmac AC_C_INLINE
@maindex C_INLINE
@vindex inline
@ -1537,18 +1545,20 @@ If the C compiler supports the @code{long double} type, define
that define @code{__STDC__} do not support @code{long double}.
@end defmac
@defmac AC_C_BIGENDIAN
@maindex C_BIGENDIAN
@vindex WORDS_BIGENDIAN
If words are stored with the most significant byte first (like Motorola
and SPARC, but not Intel and VAX, CPUs), define @code{WORDS_BIGENDIAN}.
@end defmac
@node System Services, UNIX Variants, Compiler Characteristics, Specific Tests
@section System Services
The following macros check for operating system services:
@defmac AC_HAVE_POUNDBANG (@var{action-if-supported} @r{[},
@var{action-if-not-supported}@r{]})
@maindex HAVE_POUNDBANG
Check whether the system supports starting shell scripts with a line of
the form @samp{#!/bin/csh} to select the shell to use. If @samp{#!}
works, execute shell commands @var{action-if-supported}; if not, execute
@var{action-if-not-supported}.
@end defmac
@defmac AC_PATH_X
@maindex PATH_X
Try to locate the X Window System include files and libraries. Try
@ -1582,15 +1592,6 @@ been called. Because of the macro dependencies, if you call this macro,
you should let it call @code{AC_PATH_X} rather than doing that yourself.
@end defmac
@defmac AC_HAVE_POUNDBANG (@var{action-if-supported} @r{[},
@var{action-if-not-supported}@r{]})
@maindex HAVE_POUNDBANG
Check whether the system supports starting shell scripts with a line of
the form @samp{#!/bin/csh} to select the shell to use. If @samp{#!}
works, execute shell commands @var{action-if-supported}; if not, execute
@var{action-if-not-supported}.
@end defmac
@defmac AC_SYS_LONG_FILE_NAMES
@maindex SYS_LONG_FILE_NAMES
@vindex HAVE_LONG_FILE_NAMES
@ -1717,7 +1718,8 @@ These macros are defined in the file @file{acgeneral.m4}.
@menu
* Setup:: Controlling Autoconf operation.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* C System Output:: Checking output of C compiler system.
* C Features:: Checking for particular features of C.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -1806,6 +1808,18 @@ make sure that the directory that it is told contains the source code in
fact does (@pxref{Invoking configure}, for more information).
@end defmac
@defmac AC_INIT_PREPARE (@var{unique-file-in-source-dir})
@maindex INIT_PREPARE
Find the source code directory and set up shell variables necessary for
other Autoconf macros to work. @var{unique-file-in-source-dir} is some
file that is in the package's source directory; @code{configure} checks
for this file's existence to make sure that the directory that it is
told contains the source code in fact does (@pxref{Invoking configure},
for more information). @code{AC_INIT_PREPARE} is the last thing done by
@code{AC_INIT}. Use @code{AC_INIT_PREPARE} instead of @code{AC_INIT} if you
want to do argument parsing yourself; never use both.
@end defmac
@defmac AC_OUTPUT (@r{[}@var{file}@dots{}@r{] [,}@var{extra-cmds}@r{]})
@maindex OUTPUT
Create output files (typically one or more @file{Makefile}s) and
@ -1830,6 +1844,12 @@ If you pass @var{extra-cmds}, those commands will be inserted into
@file{config.status} to be run after all its other processing.
@end defmac
@defmac AC_PREFIX (@var{program})
@maindex PREFIX
This macro is like @code{AC_PREFIX_PROGRAM}, except that it does not
find the site-wide defaults file correctly, so it is obsolete.
@end defmac
@defmac AC_PREFIX_PROGRAM (@var{program})
@maindex PREFIX_PROGRAM
If the user did not specify an installation prefix (using the
@ -1842,18 +1862,6 @@ is found, set the prefix to the parent of the directory containing
set the prefix to @file{/usr/local/gnu}.
@end defmac
@defmac AC_INIT_PREPARE (@var{unique-file-in-source-dir})
@maindex INIT_PREPARE
Find the source code directory and set up shell variables necessary for
other Autoconf macros to work. @var{unique-file-in-source-dir} is some
file that is in the package's source directory; @code{configure} checks
for this file's existence to make sure that the directory that it is
told contains the source code in fact does (@pxref{Invoking configure},
for more information). @code{AC_INIT_PREPARE} is the last thing done by
@code{AC_INIT}. Use @code{AC_INIT_PREPARE} instead of @code{AC_INIT} if you
want to do argument parsing yourself; never use both.
@end defmac
@defmac AC_PREREQ (@var{version})
@maindex PREREQ
Ensure that a recent enough version of Autoconf is being used. If the
@ -1899,10 +1907,12 @@ produces this in @file{configure}:
@end example
@end defmac
@node File Existence, C Features, Setup, General Purpose Macros
@node File Existence, C System Output, Setup, General Purpose Macros
@section Checking Whether Particular Files Exist
These macros check whether particular files exist.
These macros check whether particular files exist. They cache the
results of their tests for future use (@pxref{Caching Values}, for more
information).
@defmac AC_CHECK_LIB (@var{library}, @var{function}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex CHECK_LIB
@ -1928,20 +1938,6 @@ present, because linking the test program will always fail with
unresolved symbols.
@end defmac
@defmac AC_HAVE_LIBRARY (@var{library}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex HAVE_LIBRARY
This macro is equivalent to calling @code{AC_CHECK_LIB} with a
@var{function} argument of @code{main}. It is considered obsolete,
because some linkers (e.g., Apollo's) do not fail when asked to link
with a nonexistent library if there are no unresolved sybols.
@end defmac
@defmac AC_PREFIX (@var{program})
@maindex PREFIX
This macro is like @code{AC_PREFIX_PROGRAM}, except that it prevents
finding the site-wide defaults file correctly, so it is obsolete.
@end defmac
@defmac AC_CHECK_PROG (@var{variable}, @var{prog-to-check-for}, @var{value-if-found} @r{[}, @var{value-if-not-found}@r{]})
@maindex CHECK_PROG
Check whether program @var{prog-to-check-for} exists in @code{PATH}. If
@ -1950,14 +1946,6 @@ it is found, set @var{variable} to @var{value-if-found}, otherwise to
do nothing. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PATH_PROG (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PATH_PROG
Similar to @code{AC_CHECK_PROG}, but set @var{variable} to the entire
path of @var{prog-to-check-for} if found. Otherwise, set @var{variable}
to @var{value-if-not-found}, if given. If @var{variable} was already
set, do nothing. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_CHECK_PROGS (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex CHECK_PROGS
Check for each program in the whitespace-separated list
@ -1969,6 +1957,22 @@ list are found, set @var{variable} to @var{value-if-not-found}; if
is not changed. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_HAVE_LIBRARY (@var{library}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex HAVE_LIBRARY
This macro is equivalent to calling @code{AC_CHECK_LIB} with a
@var{function} argument of @code{main}. It is considered obsolete,
because some linkers (e.g., Apollo's) do not fail when asked to link
with a nonexistent library if there are no unresolved sybols.
@end defmac
@defmac AC_PATH_PROG (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PATH_PROG
Similar to @code{AC_CHECK_PROG}, but set @var{variable} to the entire
path of @var{prog-to-check-for} if found. Otherwise, set @var{variable}
to @var{value-if-not-found}, if given. If @var{variable} was already
set, do nothing. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PATH_PROGS (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PATH_PROGS
Like @code{AC_CHECK_PROGS}, but if any of @var{progs-to-check-for}
@ -1976,17 +1980,15 @@ are found, set @var{variable} to the entire pathname of the program
found.
@end defmac
@node C Features, Command Line, File Existence, General Purpose Macros
@section Checking For C Features
@node C System Output, C Features, File Existence, General Purpose Macros
@section Checking C Compiler System Output
These macros check for features of the C compiler, libraries, and headers.
@defmac AC_CHECK_TYPE (@var{type}, @var{default})
@maindex CHECK_TYPE
If the type @var{type} is not defined in @file{sys/types.h}, define it
to be the C (or C++) builtin type @var{default}, e.g. @samp{short} or
@samp{unsigned}.
@end defmac
These macros check the output of the C compiler system. They @emph{do
not} cache the results of their tests for future use (@pxref{Caching
Values}), because they don't know enough about the information they are
checking for to generate a cache variable name. The checks for
particular kinds of C features call these macros and do cache their
results (@pxref{C Features}).
@defmac AC_COMPILE_CHECK (@var{echo-text}, @var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex COMPILE_CHECK
@ -1994,41 +1996,19 @@ This is an obsolete alias for @code{AC_TRY_LINK}, with the addition that it
prints @samp{checking for @var{echo-text}} to the standard output first.
@end defmac
@defmac AC_CHECK_FUNC (@var{function}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_FUNC
If @var{function} is available, run shell commands
@var{action-if-found}, otherwise @var{action-if-not-found}. If the
functions might be in libraries other than the default C library, first
call @code{AC_CHECK_LIB} for those libraries. If you just want to
define a symbol if the function is available, consider using
@code{AC_CHECK_FUNCS} instead.
@end defmac
@defmac AC_EGREP_CPP (@var{pattern}, @var{program}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex EGREP_CPP
@var{program} is the text of a C or C++ program, on which shell variable and
backquote substitutions are performed. If the output of running the
preprocessor on @var{program} contains the @code{egrep} regular
expression @var{pattern}, execute shell commands @var{action-if-found},
otherwise execute @var{action-if-not-found}. (It is an unfortunate
oversight that we use the word @code{PROGRAM} in Autoconf macro names to
sometimes mean C or C++ source code and sometimes mean a UNIX command.)
@defmac AC_CHECK_FUNCS (@var{function}@dots{})
@maindex CHECK_FUNCS
@vindex HAVE_@var{function}
For each given @var{function} in the whitespace-separated argument list
that is available, define @code{HAVE_@var{function}} (in all caps).
@xref{Specific Tests}, for a precise definition of ``define'' as it
is used here. If the functions might be in libraries other than the
default C library, first call @code{AC_CHECK_LIB} for those libraries.
@end defmac
@defmac AC_CHECK_HEADERS (@var{header-file}@dots{})
@maindex CHECK_HEADERS
@vindex HAVE_@var{header}
For each given system header file @var{header-file} in the
whitespace-separated argument list that exists, define
@code{HAVE_@var{header-file}} (in all caps). @xref{Specific Tests}, for
a precise definition of ``define'' as it is used here.
@end defmac
@defmac AC_CHECK_HEADER (@var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_HEADER
If the system header file @var{header-file} exists, execute shell commands
@var{action-if-found}, otherwise execute @var{action-if-not-found}. If
you just want to define a symbol if the header file is available,
consider using @code{AC_CHECK_HEADERS} instead.
This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_EGREP_HEADER (@var{pattern}, @var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@ -2049,44 +2029,6 @@ almost always detect them by simply using @code{#ifdef} directives in
your programs.
@end defmac
@defmac AC_EGREP_CPP (@var{pattern}, @var{program}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex EGREP_CPP
@var{program} is the text of a C or C++ program, on which shell variable and
backquote substitutions are performed. If the output of running the
preprocessor on @var{program} contains the @code{egrep} regular
expression @var{pattern}, execute shell commands @var{action-if-found},
otherwise execute @var{action-if-not-found}. (It is an unfortunate
oversight that we use the word @code{PROGRAM} in Autoconf macro names to
sometimes mean C or C++ source code and sometimes mean a UNIX command.)
This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_REPLACE_FUNCS (@var{function-name}@dots{})
@maindex REPLACE_FUNCS
For each given @var{function-name} in the whitespace-separated argument
list that is not in the C library, add @samp{@var{function-name}.o} to
the value of the @code{make} variable @code{LIBOBJS}. If the functions
might be in libraries other than the default C library, first call
@code{AC_CHECK_LIB} for those libraries.
@end defmac
@defmac AC_CHECK_SIZEOF (@var{type})
@maindex CHECK_SIZEOF
Define @code{SIZEOF_@var{uctype}} to be the size in bytes of the C (or
C++) builtin type @var{type}, e.g. @samp{int} or @samp{char *}. If
@samp{type} is unknown to the compiler, gets a size of 0. @var{uctype}
is @var{type}, with lowercase converted to uppercase, spaces changed to
underscores, and asterisks changed to @samp{P}. For example, the call
@example
AC_CHECK_SIZEOF(int *)
@end example
@noindent
defines @code{SIZEOF_INT_P} to be 8 on DEC Alpha AXP systems.
@end defmac
@defmac AC_TRY_CPP (@var{includes}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex TRY_CPP
@var{includes} is C or C++ @code{#include} statements and declarations, on
@ -2133,6 +2075,80 @@ It is preferable to use @code{AC_TRY_LINK} instead of @code{AC_TRY_RUN},
when possible. @xref{Test Programs}, for more information.
@end defmac
@node C Features, Command Line, C System Output, General Purpose Macros
@section Checking For C Features
These macros check for particular kinds of features of the C compiler,
libraries, and headers. They cache the results of their tests for
future use (@pxref{Caching Values}, for more information).
@defmac AC_CHECK_FUNC (@var{function}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_FUNC
If @var{function} is available, run shell commands
@var{action-if-found}, otherwise @var{action-if-not-found}. If the
functions might be in libraries other than the default C library, first
call @code{AC_CHECK_LIB} for those libraries. If you just want to
define a symbol if the function is available, consider using
@code{AC_CHECK_FUNCS} instead.
@end defmac
@defmac AC_CHECK_FUNCS (@var{function}@dots{})
@maindex CHECK_FUNCS
@vindex HAVE_@var{function}
For each given @var{function} in the whitespace-separated argument list
that is available, define @code{HAVE_@var{function}} (in all caps).
@xref{Specific Tests}, for a precise definition of ``define'' as it
is used here. If the functions might be in libraries other than the
default C library, first call @code{AC_CHECK_LIB} for those libraries.
@end defmac
@defmac AC_CHECK_HEADER (@var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex CHECK_HEADER
If the system header file @var{header-file} exists, execute shell commands
@var{action-if-found}, otherwise execute @var{action-if-not-found}. If
you just want to define a symbol if the header file is available,
consider using @code{AC_CHECK_HEADERS} instead.
@end defmac
@defmac AC_CHECK_HEADERS (@var{header-file}@dots{})
@maindex CHECK_HEADERS
@vindex HAVE_@var{header}
For each given system header file @var{header-file} in the
whitespace-separated argument list that exists, define
@code{HAVE_@var{header-file}} (in all caps). @xref{Specific Tests}, for
a precise definition of ``define'' as it is used here.
@end defmac
@defmac AC_CHECK_SIZEOF (@var{type})
@maindex CHECK_SIZEOF
Define @code{SIZEOF_@var{uctype}} to be the size in bytes of the C (or
C++) builtin type @var{type}, e.g. @samp{int} or @samp{char *}. If
@samp{type} is unknown to the compiler, gets a size of 0. @var{uctype}
is @var{type}, with lowercase converted to uppercase, spaces changed to
underscores, and asterisks changed to @samp{P}. For example, the call
@example
AC_CHECK_SIZEOF(int *)
@end example
@noindent
defines @code{SIZEOF_INT_P} to be 8 on DEC Alpha AXP systems.
@end defmac
@defmac AC_CHECK_TYPE (@var{type}, @var{default})
@maindex CHECK_TYPE
If the type @var{type} is not defined in @file{sys/types.h}, define it
to be the C (or C++) builtin type @var{default}, e.g. @samp{short} or
@samp{unsigned}.
@end defmac
@defmac AC_REPLACE_FUNCS (@var{function-name}@dots{})
@maindex REPLACE_FUNCS
For each given @var{function-name} in the whitespace-separated argument
list that is not in the C library, add @samp{@var{function-name}.o} to
the value of the @code{make} variable @code{LIBOBJS}. If the functions
might be in libraries other than the default C library, first call
@code{AC_CHECK_LIB} for those libraries.
@end defmac
@node Command Line, Setting Variables, C Features, General Purpose Macros
@section Checking Command Line Arguments
@ -2360,7 +2376,13 @@ callers change automatically.
@defmac AC_CHECKING (@var{feature-description})
@maindex CHECKING
This macro is similar to @code{AC_MSG_CHECKING}, except that it prints a
newline after the @var{feature-description}. It is considered obsolete.
newline after the @var{feature-description}. It is useful mainly to
print a general description of the overall purpose of a group of feature
checks, e.g.
@example
AC_CHECKING(if stack overflow is detectable)
@end example
@end defmac
@defmac AC_MSG_CHECKING (@var{feature-description})
@ -2476,8 +2498,9 @@ called in the correct order.
Make @code{m4} print a warning message on the standard error output if
@var{called-macro-name} has already been called. @var{this-macro-name}
should be the name of the macro that is calling @code{AC_BEFORE}. The
macro @var{called-macro-name} must contain a call to @code{AC_PROVIDE}
to indicate that it has been called.
macro @var{called-macro-name} must have been defined using
@code{AC_DEFUN} or else contain a call to @code{AC_PROVIDE} to indicate
that it has been called.
This macro should be used when one macro makes changes that might affect
another macro, so that the other macro should probably not be called
@ -2513,8 +2536,10 @@ AC_OBSOLETE([$0], [; use AC_CHECK_HEADERS(unistd.h) instead])
@defmac AC_PROVIDE (@var{macro-name})
@maindex PROVIDE
Set a flag recording that @var{macro-name} has been called. The
argument should be the name of the macro that is calling
Set a flag recording that @var{macro-name} has been called. This macro
is called automatically when using @code{AC_DEFUN} to define a macro.
The argument should be the name of the macro that is calling
@code{AC_PROVIDE}. An easy way to get it is from the @code{m4} builtin
variable @code{$0}, like this:
@ -2527,13 +2552,14 @@ AC_PROVIDE([$0])
@maindex REQUIRE
If the @code{m4} macro @var{macro-name} has not already been called,
call it (without any arguments). Make sure to quote @var{macro-name}
with square brackets. The body of @var{macro-name} must contain a call
to @code{AC_PROVIDE} to indicate that it has been called.
with square brackets. The body of @var{macro-name} must have been
defined using @code{AC_DEFUN} or else contain a call to
@code{AC_PROVIDE} to indicate that it has been called.
Macros that need some other macro to be called before they are called
can use @code{AC_REQUIRE} to ensure that it has been, in case the person
who made @file{configure.in} forgot or didn't know to do it.
@code{AC_REQUIRE} and @code{AC_PROVIDE} together can ensure that a macro
@code{AC_REQUIRE} can ensure that a macro
is only called if it is needed, and only called once.
@xref{Dependencies Between Macros}, for more information.
@end defmac
@ -2690,11 +2716,17 @@ number, which you can get by running @samp{autoconf --version}.
@node Macro Format, Macro Naming, , Writing Macros
@section Macro Format
Autoconf macros are defined as arguments to the @code{m4} builtin
command @code{define}. Their overall structure looks like this:
@maindex DEFUN
Autoconf macros are defined as arguments to the @code{AC_DEFUN} macro,
which is similar to the @code{m4} builtin @code{define} macro. In
addition to defining the macro, @code{AC_DEFUN} causes the macro, when
it is called, to set a flag which is used to constrain the order in
which macros are called (@pxref{Prerequisite Macros}).
An Autoconf macro definition looks like this:
@example
define(@var{macro-name}, [@var{macro-body}])dnl
AC_DEFUN(@var{macro-name}, [@var{macro-body}])dnl
@end example
@noindent
@ -2828,10 +2860,10 @@ that uses the C preprocessor, it depends on @code{AC_PROG_CPP} having
been called first to set the shell variable @code{CPP}
(@pxref{Alternative Programs}).
Rather than forcing the user of the macros to keep track of all of the
dependencies between them, you can use the macros @code{AC_PROVIDE} and
@code{AC_REQUIRE} to do it automatically. @xref{Macro Ordering}, for more
information on their syntax.
Rather than forcing the user of the macros to keep track of the
dependencies between them, you can use the @code{AC_REQUIRE} macro to do
it automatically. @xref{Macro Ordering}, for more information on its
syntax.
The new macro that runs the C preprocessor should contain, somewhere
before @code{CPP} is used, the statement
@ -2840,17 +2872,11 @@ before @code{CPP} is used, the statement
AC_REQUIRE([AC_PROG_CPP])
@end example
@noindent
and the macro @code{AC_PROG_CPP} should contain the statement (anywhere
in its body)
@example
AC_PROVIDE([$0])
@end example
@noindent
Then, when the new macro is run, it will invoke @code{AC_PROG_CPP} if
and only if @code{AC_PROG_CPP} has not already been run.
The macro @code{AC_PROG_CPP} should be defined using @code{AC_DEFUN},
which as well as defining the macro, causes it to set a flag when it is
called. Then, when the new macro is run, it will invoke
@code{AC_PROG_CPP} if and only if @code{AC_PROG_CPP} has not already
been run.
@node Suggested Ordering, , Prerequisite Macros, Dependencies Between Macros
@subsection Suggested Ordering
@ -2870,8 +2896,7 @@ not when running @file{configure}. It is not a fatal error;
The @code{AC_BEFORE} macro causes @code{m4} to print a warning message
on the standard error output when a macro is used before another macro
which might change its behavior. The macro which should come first
should contain a call to @code{AC_BEFORE} and the macro which should
come later should contain a call to @code{AC_PROVIDE}.
should contain a call to @code{AC_BEFORE}.
For example, @code{AC_OS_AIX} contains
@ -2879,13 +2904,6 @@ For example, @code{AC_OS_AIX} contains
AC_BEFORE([$0], [AC_TRY_LINK])
@end example
@noindent
and @code{AC_TRY_LINK} contains
@example
AC_PROVIDE([$0])
@end example
@noindent
As a result, if @code{AC_OS_AIX} is called after @code{AC_TRY_LINK},
it will note that @code{AC_TRY_LINK} has already been called and
@ -2912,11 +2930,11 @@ Do not use @samp{test -x}, because 4.3BSD does not have it. Use
If you need to check whether a symbol is defined in a C header file, you
can use @code{AC_EGREP_HEADER} if the symbol is not a C preprocessor
macro (@pxref{C Features}), or compile a small test program that includes
the file and references the symbol (@pxref{Test Programs}). Don't
directly @code{grep} for the symbol in the file, because on some systems
it might be defined in another header file that the file you are
checking @samp{#include}s.
macro (@pxref{C System Output}), or compile a small test program
that includes the file and references the symbol (@pxref{Test
Programs}). Don't directly @code{grep} for the symbol in the file,
because on some systems it might be defined in another header file that
the file you are checking @samp{#include}s.
However, if you need to check for a particular UNIX variant which is
distinguished by having certain text in a certain file, then use
@ -2959,9 +2977,9 @@ than scanning the libraries.
If you need to check for a condition other than whether some symbol
exists on the system or has a certain value, then you can't use
@code{AC_TRY_LINK} (@pxref{C Features}). You have to write a
@code{AC_TRY_LINK} (@pxref{C System Output}). You have to write a
test program by hand. You can compile and run it using
@code{AC_TRY_RUN} (@pxref{C Features}).
@code{AC_TRY_RUN} (@pxref{C System Output}).
Try to avoid running test programs if possible, because using them
prevents people from configuring your package for cross-compiling. If

282
lib/autoconf/general.m4
View File

@ -1,4 +1,5 @@
dnl Parameterized macros that do not check for something specific.
dnl Requires GNU m4.
dnl This file is part of Autoconf.
dnl Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
dnl
@ -34,7 +35,7 @@ Install it before installing Autoconf or set the
M4 environment variable to its path name.
)m4exit(2)])dnl
dnl
define(AC_ACVERSION, 1.98)dnl
define(AC_ACVERSION, 1.99)dnl
dnl This is defined by the --version option of the autoconf script.
ifdef([AC_PRINT_VERSION], [Autoconf version AC_ACVERSION
m4exit(0)])dnl
@ -47,12 +48,19 @@ dnl m4 diversions:
define(AC_DIVERSION_NORMAL, 0)dnl normal output
define(AC_DIVERSION_SED, 1)dnl sed substitutions for config.status
define(AC_DIVERSION_VAR, 2)dnl variable assignments for config.status
define(AC_DIVERSION_HELP_ENABLE, 3)dnl --enable/--disable help strings
define(AC_DIVERSION_ARG_ENABLE, 4)dnl --enable/--disable actions
define(AC_DIVERSION_HELP_WITH, 5)dnl --with/--without help strings
define(AC_DIVERSION_ARG_WITH, 6)dnl --with/--without actions
define(AC_DIVERSION_HELP, 3)dnl --enable/--with help strings
define(AC_DIVERSION_ARG, 4)dnl --enable/--with actions
divert(AC_DIVERSION_NORMAL)dnl
dnl
define(AC_INIT_NOTICE,
dnl Define a macro which automatically provides itself.
dnl Use instead of define for macros to be used as functions.
dnl
dnl AC_DEFUN(NAME, EXPANSION)
define([AC_DEFUN],
[define($1,
[define([AC_PROVIDE_$1], )][$2])])dnl
dnl
AC_DEFUN(AC_INIT_NOTICE,
[# Guess values for system-dependent variables and create Makefiles.
# Generated automatically using autoconf version] AC_ACVERSION [
# Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
@ -72,7 +80,7 @@ define(AC_INIT_NOTICE,
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
])dnl
dnl
define(AC_INIT_PARSEARGS,
AC_DEFUN(AC_INIT_PARSEARGS,
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
# Save the original args to write them into config.status later.
@ -105,10 +113,8 @@ Features and packages:
--x-includes=DIR X include files are in DIR
--x-libraries=DIR X library files are in DIR
--enable/--disable options recognized:
undivert(AC_DIVERSION_HELP_ENABLE)dnl
--with/--without options recognized:
undivert(AC_DIVERSION_HELP_WITH)"dnl
--enable/--with options recognized:
undivert(AC_DIVERSION_HELP)"dnl
changequote([, ])dnl
# Initialize some variables set by options.
@ -358,25 +364,24 @@ fi
dnl
dnl Try to have only one #! line, just so it doesn't look funny.
dnl
define(AC_BINSH,
[AC_PROVIDE([AC_BINSH])dnl
dnl AC_REQUIRE inserts a newline after this.
#!/bin/sh])dnl
AC_DEFUN(AC_BINSH,
[#!/bin/sh
])dnl
dnl
define(AC_INIT,
AC_DEFUN(AC_INIT,
[AC_REQUIRE([AC_BINSH])dnl
AC_INIT_NOTICE
AC_INIT_PARSEARGS
AC_INIT_PREPARE($1)])dnl
dnl
dnl AC_INIT_PREPARE(UNIQUE-FILE-IN-SOURCE-DIR)
define(AC_INIT_PREPARE,
AC_DEFUN(AC_INIT_PREPARE,
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
AC_BEFORE([$0], [AC_CONFIG_HEADER])dnl
AC_BEFORE([$0], [AC_REVISION])dnl
AC_BEFORE([$0], [AC_PREREQ])dnl
AC_BEFORE([$0], [AC_CONFIG_SUBDIRS])dnl
dnl AC_BEFORE([$0], [AC_CONFIG_SUBDIRS])dnl
trap 'rm -fr conftest* confdefs* core $ac_clean_files; exit 1' 1 2 15
trap 'rm -fr confdefs* $ac_clean_files' 0
@ -465,27 +470,25 @@ AC_SITE_LOAD
AC_CACHE_LOAD
AC_LANG_C
undivert(AC_DIVERSION_ARG_ENABLE)dnl
undivert(AC_DIVERSION_ARG_WITH)dnl
undivert(AC_DIVERSION_ARG)dnl
])dnl
dnl
dnl AC_ARG_ENABLE(FEATURE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_ENABLE,
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_ENABLE)dnl
AC_DEFUN(AC_ARG_ENABLE,
[divert(AC_DIVERSION_HELP)dnl
$2
divert(AC_DIVERSION_ARG_ENABLE)dnl
divert(AC_DIVERSION_ARG)dnl
AC_ENABLE_INTERNAL([$1], [$3], [$4])dnl
divert(AC_DIVERSION_NORMAL)dnl
])dnl
dnl
define(AC_ENABLE,
AC_DEFUN(AC_ENABLE,
[AC_OBSOLETE([$0], [; instead use AC_ARG_ENABLE before AC_INIT])dnl
AC_ENABLE_INTERNAL([$1], [$2], [$3])dnl
])dnl
dnl
dnl AC_ENABLE_INTERNAL(FEATURE, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ENABLE_INTERNAL,
AC_DEFUN(AC_ENABLE_INTERNAL,
[[#] Check whether --enable-$1 or --disable-$1 was given.
enableval="[$enable_]patsubst($1, -, _)"
if test -n "$enableval"; then
@ -497,22 +500,21 @@ fi
])dnl
dnl
dnl AC_ARG_WITH(PACKAGE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_WITH,
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_WITH)dnl
AC_DEFUN(AC_ARG_WITH,
[divert(AC_DIVERSION_HELP)dnl
$2
divert(AC_DIVERSION_ARG_WITH)dnl
divert(AC_DIVERSION_ARG)dnl
AC_WITH_INTERNAL([$1], [$3], [$4])dnl
divert(AC_DIVERSION_NORMAL)dnl
])dnl
dnl
define(AC_WITH,
AC_DEFUN(AC_WITH,
[AC_OBSOLETE([$0], [; instead use AC_ARG_WITH before AC_INIT])dnl
AC_WITH_INTERNAL([$1], [$2], [$3])dnl
])dnl
dnl
dnl AC_WITH_INTERNAL(PACKAGE, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_WITH_INTERNAL,
AC_DEFUN(AC_WITH_INTERNAL,
[[#] Check whether --with-$1 or --without-$1 was given.
withval="[$with_]patsubst($1, -, _)"
if test -n "$withval"; then
@ -524,24 +526,28 @@ fi
])dnl
dnl
dnl AC_CONFIG_HEADER(HEADER-TO-CREATE ...)
define(AC_CONFIG_HEADER, [AC_PROVIDE([$0])define(AC_LIST_HEADERS, $1)])dnl
AC_DEFUN(AC_CONFIG_HEADER,
[define(AC_LIST_HEADERS, $1)])dnl
dnl
dnl AC_REVISION(REVISION-INFO)
define(AC_REVISION, [AC_PROVIDE([$0])AC_REQUIRE([AC_BINSH])dnl
AC_DEFUN(AC_REVISION,
[AC_REQUIRE([AC_BINSH])dnl
[# From configure.in] translit([$1], $")])dnl
dnl
dnl Subroutines of AC_PREREQ.
dnl
dnl Change the dots in version number $1 into commas.
define(AC_PREREQ_SPLIT, [translit($1, ., [, ])])dnl
AC_DEFUN(AC_PREREQ_SPLIT,
[translit($1, ., [, ])])dnl
dnl
dnl Default the ternary version number to 0 (e.g., 1, 7 -> 1, 7, 0).
define(AC_PREREQ_CANON, [$1, $2, ifelse([$3], , 0, [$3])])dnl
AC_DEFUN(AC_PREREQ_CANON,
[$1, $2, ifelse([$3], , 0, [$3])])dnl
dnl
dnl Complain and exit if the version number in $1 through $3 is less than
dnl the version number in $4 through $6.
dnl $7 is the printable version of the second version number.
define(AC_PREREQ_COMPARE,
AC_DEFUN(AC_PREREQ_COMPARE,
[ifelse(builtin([eval],
[$3 + $2 * 100 + $1 * 10000 < $6 + $5 * 100 + $4 * 10000]), 1,
[errprint(Autoconf version $7 or higher is required
@ -549,17 +555,15 @@ define(AC_PREREQ_COMPARE,
dnl
dnl Complain and exit if the Autoconf version is less than $1.
dnl AC_PREREQ(VERSION)
define(AC_PREREQ,
[AC_PROVIDE([$0])dnl
AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
AC_DEFUN(AC_PREREQ,
[AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])), [$1])])dnl
dnl
dnl Run configure in subdirectories $1.
dnl Not actually done until AC_OUTPUT_SUBDIRS.
dnl AC_CONFIG_SUBDIRS(DIR ...)
define(AC_CONFIG_SUBDIRS,
[AC_PROVIDE([$0])dnl
AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
AC_DEFUN(AC_CONFIG_SUBDIRS,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
define([AC_LIST_SUBDIRS], [$1])])dnl
dnl
dnl Guess the value for the `prefix' variable by looking for
@ -567,8 +571,9 @@ dnl the argument program along PATH and taking its parent.
dnl Example: if the argument is `gcc' and we find /usr/local/gnu/bin/gcc,
dnl set `prefix' to /usr/local/gnu.
dnl AC_PREFIX_PROGRAM(PROGRAM)
define(AC_PREFIX_PROGRAM, [define([AC_LIST_PREFIX_PROGRAM], [$1])])dnl
define(AC_PREFIX_INTERNAL,
AC_DEFUN(AC_PREFIX_PROGRAM,
[define([AC_LIST_PREFIX_PROGRAM], [$1])])dnl
AC_DEFUN(AC_PREFIX_INTERNAL,
[if test "x$prefix" = xNONE; then
changequote(<<, >>)dnl
define(<<AC_VAR_NAME>>, translit($1, [a-z], [A-Z]))dnl
@ -582,7 +587,7 @@ changequote([, ])dnl
fi
undefine(AC_VAR_NAME)dnl
])dnl
define(AC_PREFIX,
AC_DEFUN(AC_PREFIX,
[AC_OBSOLETE([$0], [; instead use AC_PREFIX_PROGRAM before AC_INIT])dnl
AC_PREFIX_INTERNAL([$1])])dnl
dnl
@ -594,12 +599,12 @@ dnl Find install.sh, config.sub, config.guess, and Cygnus configure
dnl in directory $1. These are auxiliary files used in configuration.
dnl $1 can be either absolute or relative to ${srcdir}.
dnl AC_CONFIG_AUX_DIR(DIR)
define(AC_CONFIG_AUX_DIR,
AC_DEFUN(AC_CONFIG_AUX_DIR,
[AC_CONFIG_AUX_DIRS($1 ${srcdir}/$1)])dnl
dnl
dnl The default is `${srcdir}' or `${srcdir}/..' or `${srcdir}/../..'.
dnl There's no need to call this macro explicitly; just AC_REQUIRE it.
define(AC_CONFIG_AUX_DIR_DEFAULT,
AC_DEFUN(AC_CONFIG_AUX_DIR_DEFAULT,
[AC_CONFIG_AUX_DIRS(${srcdir} ${srcdir}/.. ${srcdir}/../..)])dnl
dnl
dnl Internal subroutine.
@ -607,7 +612,7 @@ dnl Search for the configuration auxiliary files in directory list $1.
dnl We look only for install.sh, so users of AC_PROG_INSTALL
dnl do not automatically need to distribute the other auxiliary files.
dnl AC_CONFIG_AUX_DIRS(DIR ...)
define(AC_CONFIG_AUX_DIRS,
AC_DEFUN(AC_CONFIG_AUX_DIRS,
[ac_aux_dir=
for ac_dir in $1; do
if test -f $ac_dir/install.sh; then
@ -625,7 +630,7 @@ AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
])dnl
dnl
dnl Canonicalize the host, target, and build system types.
define(AC_CANONICAL_SYSTEM,
AC_DEFUN(AC_CANONICAL_SYSTEM,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Do some error checking and defaulting for the host and target type.
# The inputs are:
@ -663,7 +668,7 @@ AC_CANONICAL_BUILD
dnl
dnl Subroutines of AC_CANONICAL_SYSTEM.
dnl
define(AC_CANONICAL_HOST,
AC_DEFUN(AC_CANONICAL_HOST,
[AC_MSG_CHECKING(host system type)
case "${host_alias}" in
@ -689,7 +694,7 @@ AC_SUBST(host_vendor)dnl
AC_SUBST(host_os)dnl
])dnl
dnl
define(AC_CANONICAL_TARGET,
AC_DEFUN(AC_CANONICAL_TARGET,
[AC_MSG_CHECKING(target system type)
case "${target_alias}" in
@ -712,7 +717,7 @@ AC_SUBST(target_vendor)dnl
AC_SUBST(target_os)dnl
])dnl
dnl
define(AC_CANONICAL_BUILD,
AC_DEFUN(AC_CANONICAL_BUILD,
[AC_MSG_CHECKING(build system type)
case "${build_alias}" in
@ -736,7 +741,7 @@ dnl Link each of the existing files in $2 to the corresponding
dnl link name in $1.
dnl Not actually done until AC_OUTPUT_LINKS.
dnl AC_LINK_FILES(LINK ..., FILE ...)
define(AC_LINK_FILES,
AC_DEFUN(AC_LINK_FILES,
[define([AC_LIST_LINKS], [$1])define([AC_LIST_FILES], [$2])])dnl
dnl
dnl
@ -744,7 +749,7 @@ dnl ### Caching test results
dnl
dnl
dnl Look for site or system specific initialization scripts.
define(AC_SITE_LOAD,
AC_DEFUN(AC_SITE_LOAD,
[ac_site_dirs=/usr/local
if test "x$prefix" != xNONE; then
ac_site_dirs=$prefix
@ -762,16 +767,17 @@ for ac_site_dir in $ac_site_dirs; do
done
])dnl
dnl
define(AC_CACHE_LOAD,
AC_DEFUN(AC_CACHE_LOAD,
[if test -r "$cache_file"; then
echo "loading cache $cache_file"
. $cache_file
else
echo "creating cache $cache_file"
> $cache_file
fi])dnl
fi
])dnl
dnl
define(AC_CACHE_SAVE,
AC_DEFUN(AC_CACHE_SAVE,
[if test -w $cache_file; then
echo "updating cache $cache_file"
cat > $cache_file <<\CEOF
@ -793,11 +799,12 @@ dnl Allow a site initialization script to override cache values.
# Ultrix sh set writes to stderr and can't be redirected directly.
(set) 2>&1 | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
changequote([, ])dnl
fi])dnl
fi
])dnl
dnl
dnl AC_CACHE_VAL(CACHE-ID, COMMANDS-TO-SET-IT)
dnl The name of shell var CACHE-ID must contain `_cv_' in order to get saved.
define(AC_CACHE_VAL,
AC_DEFUN(AC_CACHE_VAL,
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
dnl We used to use the below line, but it fails if the 1st arg is a
dnl shell variable, so we need the eval.
@ -816,38 +823,43 @@ dnl
dnl Several simple subroutines to do various flavors of quoting.
dnl
dnl Quote $1 against shell "s.
define(AC_QUOTE_DQUOTE, [dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
AC_DEFUN(AC_QUOTE_DQUOTE,
[dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
patsubst($1, changequote(, )\([$"`\\]\)changequote([, ]), \\\1)])dnl
dnl
dnl Quote $1 against shell 's.
define(AC_QUOTE_SQUOTE, [patsubst($1, ', '\\'')])dnl
AC_DEFUN(AC_QUOTE_SQUOTE,
[patsubst($1, ', '\\'')])dnl
dnl
dnl Quote $1 against shell here documents (<<EOF).
define(AC_QUOTE_HERE, [changequote({, })dnl
AC_DEFUN(AC_QUOTE_HERE,
[changequote({, })dnl
dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
patsubst(patsubst($1, \(\\[$`\\]\), \\\1), \([$`]\), \\\1){}dnl
changequote([, ])])dnl
dnl
dnl Quote $1 against the right hand side of a sed substitution.
define(AC_QUOTE_SED, [changequote({, })dnl
AC_DEFUN(AC_QUOTE_SED,
[changequote({, })dnl
dnl We use \1 instead of \& to avoid an m4 1.0.3 bug.
dnl % and @ and ! are commonly used as the sed s separator character.
patsubst($1, \([&\\%@!]\), \\\1){}dnl
changequote([, ])])dnl
dnl
dnl Quote $1 against tokenization.
define(AC_QUOTE_TOKEN, [changequote({, })dnl
AC_DEFUN(AC_QUOTE_TOKEN,
[changequote({, })dnl
patsubst($1, \([ ]\), \\\1){}dnl
changequote([, ])])dnl
dnl
dnl Subroutines of AC_DEFINE. Does more quoting magic than any sane person
dnl should be able to understand. The point of it all is that what goes into
dnl Makefile et al should be verbatim what was written in configure.in.
define(AC_DEFINE_QUOTE, [dnl
AC_QUOTE_TOKEN(AC_QUOTE_SQUOTE(AC_QUOTE_DQUOTE($1)))])dnl
AC_DEFUN(AC_DEFINE_QUOTE,
[AC_QUOTE_TOKEN(AC_QUOTE_SQUOTE(AC_QUOTE_DQUOTE($1)))])dnl
dnl
define(AC_DEFINE_SEDQUOTE, [dnl
AC_QUOTE_DQUOTE(AC_QUOTE_HERE(AC_QUOTE_HERE(AC_QUOTE_SED($1))))])dnl
AC_DEFUN(AC_DEFINE_SEDQUOTE,
[AC_QUOTE_DQUOTE(AC_QUOTE_HERE(AC_QUOTE_HERE(AC_QUOTE_SED($1))))])dnl
dnl
dnl Don't compare $2 to a blank, so we can support "-Dfoo=".
dnl If creating a configuration header file, we add
@ -857,7 +869,8 @@ dnl variable parts of the string: the variable name to define
dnl and the value to give it.
dnl The newlines around the curly braces prevent sh syntax errors.
dnl AC_DEFINE(VARIABLE [, VALUE])
define(AC_DEFINE, [
AC_DEFUN(AC_DEFINE,
[
{
dnl Uniformly use AC_DEFINE_[SED]QUOTE, so callers of AC_DEFINE_UNQUOTED
dnl can use AC_QUOTE_* manually if they want to.
@ -885,9 +898,10 @@ dnl the top level, because m4 doesn't really support nested functions;
dnl it doesn't distinguish between the arguments to the outer
dnl function, which should be expanded, and the arguments to the inner
dnl function, which shouldn't yet.
define(AC_QUOTE_IDENTITY, $1)dnl
define(AC_DEFINE_UNQUOTED, [dnl
pushdef([AC_QUOTE_SQUOTE], defn([AC_QUOTE_IDENTITY]))dnl
AC_DEFUN(AC_QUOTE_IDENTITY,
$1)dnl
AC_DEFUN(AC_DEFINE_UNQUOTED,
[pushdef([AC_QUOTE_SQUOTE], defn([AC_QUOTE_IDENTITY]))dnl
pushdef([AC_DEFINE_SEDQUOTE], defn([AC_QUOTE_IDENTITY]))dnl
AC_DEFINE($1, $2)dnl
popdef([AC_DEFINE_SEDQUOTE])dnl
@ -897,7 +911,7 @@ dnl
dnl This macro protects the argument from being diverted twice
dnl if this macro is called twice for it.
dnl AC_SUBST(VARIABLE)
define(AC_SUBST,
AC_DEFUN(AC_SUBST,
[ifdef([AC_SUBST_$1], ,
[define([AC_SUBST_$1], )dnl
divert(AC_DIVERSION_SED)dnl
@ -908,7 +922,7 @@ divert(AC_DIVERSION_NORMAL)dnl
])])dnl
dnl
dnl AC_SUBST_FILE(VARIABLE, FILE)
define(AC_SUBST_FILE,
AC_DEFUN(AC_SUBST_FILE,
[if test -f $2; then
echo using $2 for $1)
AC_INSERT_FILE($1, $2)
@ -917,7 +931,7 @@ elif test -f ${srcdir}/$2; then
AC_INSERT_FILE($1, ${srcdir}/$2)
fi
])dnl
define(AC_INSERT_FILE,
AC_DEFUN(AC_INSERT_FILE,
[ifdef([AC_SUBST_$1], ,
[define([AC_SUBST_$1], )dnl
divert(AC_DIVERSION_SED)dnl
@ -933,47 +947,44 @@ dnl ### Printing messages
dnl
dnl
dnl AC_MSG_CHECKING(FEATURE-DESCRIPTION)
define(AC_MSG_CHECKING,
AC_DEFUN(AC_MSG_CHECKING,
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
echo $ac_n "checking $1""... $ac_c" 1>&4])dnl
dnl
define(AC_CHECKING,
[AC_OBSOLETE([$0], [; instead use AC_MSG_CHECKING])dnl
echo "checking $1" 1>&4])dnl
AC_DEFUN(AC_CHECKING,
[echo "checking $1" 1>&4])dnl
dnl
dnl AC_MSG_RESULT(RESULT-DESCRIPTION)
define(AC_MSG_RESULT,
AC_DEFUN(AC_MSG_RESULT,
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
echo "$ac_t""$1" 1>&4])dnl
dnl
define(AC_VERBOSE,
AC_DEFUN(AC_VERBOSE,
[AC_OBSOLETE([$0], [; instead use AC_MSG_RESULT])dnl
echo " $1" 1>&4])dnl
dnl
dnl AC_MSG_WARN(PROBLEM-DESCRIPTION)
define(AC_MSG_WARN,
AC_DEFUN(AC_MSG_WARN,
[echo "configure: warning: $1" 1>&2])dnl
dnl
dnl AC_MSG_ERROR(ERROR-DESCRIPTION)
define(AC_MSG_ERROR,
AC_DEFUN(AC_MSG_ERROR,
[echo "configure: $1" 1>&2; exit 1])dnl
dnl
dnl
dnl ### Selecting which language to use for testing
dnl
dnl
define(AC_LANG_C,
AC_DEFUN(AC_LANG_C,
[define([AC_LANG], [C])dnl
AC_PROVIDE([$0])dnl
ac_ext=c
# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
ac_cpp='${CPP}'
ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&5 2>&5'
])dnl
dnl
define(AC_LANG_CPLUSPLUS,
AC_DEFUN(AC_LANG_CPLUSPLUS,
[define([AC_LANG], [CPLUSPLUS])dnl
AC_PROVIDE([$0])dnl
ac_ext=C
# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
ac_cpp='${CXXCPP}'
@ -981,10 +992,11 @@ ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1
])dnl
dnl
dnl Push the current language on a stack.
define(AC_LANG_SAVE, [pushdef([AC_LANG_STACK], AC_LANG)])dnl
AC_DEFUN(AC_LANG_SAVE,
[pushdef([AC_LANG_STACK], AC_LANG)])dnl
dnl
dnl Restore the current language from the stack.
define(AC_LANG_RESTORE,
AC_DEFUN(AC_LANG_RESTORE,
[ifelse(AC_LANG_STACK, C, [ifelse(AC_LANG, C, , [AC_LANG_C])], [ifelse(AC_LANG, CPLUSPLUS, , [AC_LANG_CPLUSPLUS])])[]popdef([AC_LANG_STACK])])dnl
dnl
dnl
@ -992,21 +1004,20 @@ dnl ### Enforcing ordering constraints
dnl
dnl
dnl AC_BEFORE(THIS-MACRO-NAME, CALLED-MACRO-NAME)
define(AC_BEFORE,
AC_DEFUN(AC_BEFORE,
[ifdef([AC_PROVIDE_$2], [errprint(__file__:__line__: [$2 was called before $1
])])])dnl
dnl
dnl AC_REQUIRE(MACRO-NAME)
define(AC_REQUIRE,
[ifdef([AC_PROVIDE_$1], , [indir([$1])
])])dnl
AC_DEFUN(AC_REQUIRE,
[ifdef([AC_PROVIDE_$1], , [indir([$1])])])dnl
dnl
dnl AC_PROVIDE(MACRO-NAME)
define(AC_PROVIDE,
[define([AC_PROVIDE_$1], )])dnl
dnl
dnl AC_OBSOLETE(THIS-MACRO-NAME [, SUGGESTION])
define(AC_OBSOLETE,
AC_DEFUN(AC_OBSOLETE,
[errprint(__file__:__line__: warning: [$1] is obsolete[$2]
)])dnl
dnl
@ -1016,7 +1027,7 @@ dnl
dnl
dnl AC_CHECK_PROG(VARIABLE, PROG-TO-CHECK-FOR, VALUE-IF-FOUND
dnl [, VALUE-IF-NOT-FOUND])
define(AC_CHECK_PROG,
AC_DEFUN(AC_CHECK_PROG,
[# Extract the first word of "$2", so it can be a program name with args.
set dummy $2; ac_word=[$]2
AC_MSG_CHECKING([for $ac_word])
@ -1039,12 +1050,16 @@ ifelse([$4], , , [ test -z "[$]ac_cv_prog_$1" && ac_cv_prog_$1="$4"
])dnl
fi])dnl
$1="$ac_cv_prog_$1"
test -n "[$]$1" && AC_MSG_RESULT([$]$1)
if test -n "[$]$1"; then
AC_MSG_RESULT([$]$1)
else
AC_MSG_RESULT(no)
fi
AC_SUBST($1)dnl
])dnl
dnl
dnl AC_PATH_PROG(VARIABLE, PROG-TO-CHECK-FOR [, VALUE-IF-NOT-FOUND])
define(AC_PATH_PROG,
AC_DEFUN(AC_PATH_PROG,
[# Extract the first word of "$2", so it can be a program name with args.
set dummy $2; ac_word=[$]2
AC_MSG_CHECKING([for $ac_word])
@ -1070,7 +1085,11 @@ ifelse([$3], , , [ test -z "[$]ac_cv_path_$1" && ac_cv_path_$1="$3"
;;
esac])dnl
$1="$ac_cv_path_$1"
test -n "[$]$1" && AC_MSG_RESULT([$]$1)
if test -n "[$]$1"; then
AC_MSG_RESULT([$]$1)
else
AC_MSG_RESULT(no)
fi
AC_SUBST($1)dnl
])dnl
dnl
@ -1079,7 +1098,7 @@ dnl ### Checking for files - derived (caching)
dnl
dnl
dnl AC_CHECK_PROGS(VARIABLE, PROGS-TO-CHECK-FOR [, VALUE-IF-NOT-FOUND])
define(AC_CHECK_PROGS,
AC_DEFUN(AC_CHECK_PROGS,
[for ac_prog in $2
do
AC_CHECK_PROG($1, [$]ac_prog, [$]ac_prog, )
@ -1089,7 +1108,7 @@ ifelse([$3], , , [test -n "[$]$1" || $1="$3"
])])dnl
dnl
dnl AC_PATH_PROGS(VARIABLE, PROGS-TO-CHECK-FOR [, VALUE-IF-NOT-FOUND])
define(AC_PATH_PROGS,
AC_DEFUN(AC_PATH_PROGS,
[for ac_prog in $2
do
AC_PATH_PROG($1, [$]ac_prog)
@ -1100,7 +1119,7 @@ ifelse([$3], , , [test -n "[$]$1" || $1="$3"
dnl
dnl AC_CHECK_LIB(LIBRARY, FUNCTION, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
dnl [, OTHER-LIBRARIES]]])
define(AC_CHECK_LIB,
AC_DEFUN(AC_CHECK_LIB,
[changequote(/, /)dnl
define(/AC_LIB_NAME/, dnl
patsubst(patsubst($1, /lib\([^\.]*\)\.a/, /\1/), /-l/, //))dnl
@ -1129,7 +1148,7 @@ undefine(AC_CV_NAME)dnl
dnl
dnl AC_HAVE_LIBRARY(LIBRARY, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
dnl [, OTHER-LIBRARIES]]])
define(AC_HAVE_LIBRARY,
AC_DEFUN(AC_HAVE_LIBRARY,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_LIB])dnl
AC_CHECK_LIB([$1], main, [$2], [$3], [$4])dnl
])dnl
@ -1140,17 +1159,15 @@ dnl
dnl
dnl AC_EGREP_HEADER(PATTERN, HEADER-FILE, ACTION-IF-FOUND [,
dnl ACTION-IF-NOT-FOUND])
define(AC_EGREP_HEADER,
[AC_PROVIDE([$0])dnl
AC_EGREP_CPP([$1], [#include <$2>], [$3], [$4])])dnl
AC_DEFUN(AC_EGREP_HEADER,
[AC_EGREP_CPP([$1], [#include <$2>], [$3], [$4])])dnl
dnl
dnl Because this macro is used by AC_PROG_GCC_TRADITIONAL, which must come early,
dnl it is not included in AC_BEFORE checks.
dnl Because this macro is used by AC_PROG_GCC_TRADITIONAL, which must
dnl come early, it is not included in AC_BEFORE checks.
dnl AC_EGREP_CPP(PATTERN, PROGRAM, ACTION-IF-FOUND [,
dnl ACTION-IF-NOT-FOUND])
define(AC_EGREP_CPP,
AC_DEFUN(AC_EGREP_CPP,
[AC_REQUIRE_CPP()dnl
AC_PROVIDE([$0])dnl
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$2]
@ -1169,9 +1186,8 @@ rm -f conftest*
dnl
dnl AC_COMPILE_CHECK(ECHO-TEXT, INCLUDES, FUNCTION-BODY,
dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_COMPILE_CHECK,
[AC_PROVIDE([$0])dnl
dnl It's actually ok to use this, if you don't care about caching.
AC_DEFUN(AC_COMPILE_CHECK,
[dnl It's actually ok to use this, if you don't care about caching.
dnl AC_OBSOLETE([$0], [; instead use AC_TRY_LINK])dnl
ifelse([$1], , , [AC_CHECKING([for $1])
])dnl
@ -1180,9 +1196,8 @@ AC_TRY_LINK([$2], [$3], [$4], [$5])dnl
dnl
dnl AC_TRY_LINK(INCLUDES, FUNCTION-BODY,
dnl ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_TRY_LINK,
[AC_PROVIDE([$0])dnl
dnl We use return because because C++ requires a prototype for exit.
AC_DEFUN(AC_TRY_LINK,
[dnl We use return because because C++ requires a prototype for exit.
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
[$1]
@ -1204,9 +1219,8 @@ rm -f conftest*]
dnl
dnl AC_TRY_RUN(PROGRAM, ACTION-IF-TRUE [, ACTION-IF-FALSE
dnl [, ACTION-IF-CROSS-COMPILING]])
define(AC_TRY_RUN,
[AC_PROVIDE([$0])dnl
AC_REQUIRE([AC_C_CROSS])dnl
AC_DEFUN(AC_TRY_RUN,
[AC_REQUIRE([AC_C_CROSS])dnl
if test "$cross_compiling" = yes; then
ifelse([$4], , AC_MSG_ERROR(can not run test program while cross compiling),
[AC_MSG_WARN(using default for cross-compiling)
@ -1228,7 +1242,7 @@ fi
rm -fr conftest*])dnl
dnl
dnl AC_TRY_CPP(INCLUDES, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_TRY_CPP,
AC_DEFUN(AC_TRY_CPP,
[AC_REQUIRE_CPP()dnl
cat > conftest.${ac_ext} <<EOF
#include "confdefs.h"
@ -1252,7 +1266,7 @@ dnl ### Checking for C features - derived (caching)
dnl
dnl
dnl AC_CHECK_HEADER(HEADER-FILE, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_CHECK_HEADER,
AC_DEFUN(AC_CHECK_HEADER,
[dnl Do the transliteration at runtime so arg 1 can be a shell variable.
ac_var=`echo "$1" | tr './' '__'`
AC_MSG_CHECKING([for $1])
@ -1270,7 +1284,7 @@ fi
])dnl
dnl
dnl AC_CHECK_FUNC(FUNCTION, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_CHECK_FUNC,
AC_DEFUN(AC_CHECK_FUNC,
[AC_MSG_CHECKING([for $1])
AC_CACHE_VAL(ac_cv_func_$1,
[AC_TRY_LINK(
@ -1296,7 +1310,7 @@ fi
])dnl
dnl
dnl AC_CHECK_FUNCS(FUNCTION...)
define(AC_CHECK_FUNCS,
AC_DEFUN(AC_CHECK_FUNCS,
[for ac_func in $1
do
changequote(, )dnl
@ -1307,7 +1321,7 @@ done
])dnl
dnl
dnl AC_CHECK_HEADERS(HEADER-FILE...)
define(AC_CHECK_HEADERS,
AC_DEFUN(AC_CHECK_HEADERS,
[AC_REQUIRE_CPP()dnl Make sure the cpp check happens outside the loop.
for ac_hdr in $1
do
@ -1319,7 +1333,7 @@ done
])dnl
dnl
dnl AC_REPLACE_FUNCS(FUNCTION-NAME...)
define(AC_REPLACE_FUNCS,
AC_DEFUN(AC_REPLACE_FUNCS,
[for ac_func in $1
do
AC_CHECK_FUNC(${ac_func}, , [LIBOBJS="$LIBOBJS ${ac_func}.o"])
@ -1328,7 +1342,7 @@ AC_SUBST(LIBOBJS)dnl
])dnl
dnl
dnl AC_CHECK_SIZEOF(TYPE)
define(AC_CHECK_SIZEOF,
AC_DEFUN(AC_CHECK_SIZEOF,
[changequote(<<, >>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
@ -1352,7 +1366,7 @@ undefine(AC_CV_NAME)dnl
])dnl
dnl
dnl AC_CHECK_TYPE(TYPE, DEFAULT)
define(AC_CHECK_TYPE,
AC_DEFUN(AC_CHECK_TYPE,
[AC_MSG_CHECKING(for $1 in sys/types.h)
AC_CACHE_VAL(ac_cv_type_$1,
[AC_EGREP_HEADER($1, sys/types.h, ac_cv_type_$1=yes, ac_cv_type_$1=no)])dnl
@ -1367,7 +1381,7 @@ dnl ### The big finish
dnl
dnl
dnl AC_OUTPUT([FILE...] [, EXTRA-CMDS])
define(AC_OUTPUT,
AC_DEFUN(AC_OUTPUT,
[AC_CACHE_SAVE
test "x$prefix" = xNONE && prefix=/usr/local
@ -1401,8 +1415,8 @@ ifdef([AC_LIST_HEADERS],
[divert(AC_DIVERSION_SED)dnl
s%@DEFS@%-DHAVE_CONFIG_H%],
[divert(AC_DIVERSION_SED)dnl
s%@DEFS@%$DEFS%]
[divert(AC_DIVERSION_VAR)dnl
s%@DEFS@%$DEFS%
divert(AC_DIVERSION_VAR)dnl
DEFS='$DEFS'
])dnl
divert(AC_DIVERSION_VAR)dnl
@ -1410,7 +1424,7 @@ ac_vpsub='$ac_vpsub'
extrasub='$extrasub'
divert(AC_DIVERSION_NORMAL)dnl
# Some shells look in PATH for config.status without the "./".
# Without the "./", some shells look in PATH for config.status.
: ${CONFIG_STATUS=./config.status}
trap "rm -f ${CONFIG_STATUS}; exit 1" 1 2 15
@ -1546,7 +1560,7 @@ dnl
dnl Create the header files listed in $1.
dnl This is a subroutine of AC_OUTPUT. It is called inside a quoted
dnl here document whose contents are going into config.status.
define(AC_OUTPUT_HEADER,
AC_DEFUN(AC_OUTPUT_HEADER,
[changequote(<<, >>)dnl
# These sed commands are put into ac_sed_defs when defining a macro.
@ -1661,7 +1675,7 @@ rm -f conftest.sed
])dnl
dnl
define(AC_OUTPUT_LINKS,
AC_DEFUN(AC_OUTPUT_LINKS,
[ac_links="$1"
ac_files="$2"
while test -n "${ac_files}"; do
@ -1683,7 +1697,7 @@ while test -n "${ac_files}"; do
done
])dnl
dnl
define(AC_OUTPUT_SUBDIRS,
AC_DEFUN(AC_OUTPUT_SUBDIRS,
[if test -z "${norecursion}"; then
# Remove --cache-file and --srcdir arguments so they do not pile up.

206
lib/autoconf/specific.m4
View File

@ -28,9 +28,8 @@ dnl Check whether to use -n, \c, or newline-tab to separate
dnl checking messages from result messages.
dnl Idea borrowed from dist 3.0.
dnl Internal use only.
define(AC_PROG_ECHO_N,
[AC_PROVIDE([$0])dnl
if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
AC_DEFUN(AC_PROG_ECHO_N,
[if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
if (echo -n testing; echo 1,2,3) | grep -e -n > /dev/null; then
ac_n= ac_c='
' ac_t=' '
@ -39,11 +38,11 @@ if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
fi
else
ac_n= ac_c='\c' ac_t=
fi])dnl
fi
])dnl
dnl
define(AC_PROG_CC,
AC_DEFUN(AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_PROVIDE([$0])dnl
AC_CHECK_PROG(CC, gcc, gcc, cc)
AC_MSG_CHECKING(whether we are using GNU C)
@ -62,9 +61,8 @@ AC_MSG_RESULT($ac_cv_prog_gcc)
if test $ac_cv_prog_gcc = yes; then GCC=yes; else GCC= ; fi
])dnl
dnl
define(AC_PROG_CXX,
AC_DEFUN(AC_PROG_CXX,
[AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
AC_PROVIDE([$0])dnl
AC_CHECK_PROGS(CXX, $CCC c++ g++ gcc CC cxx, gcc)
# Find out if we are using GNU C++, under whatever name.
@ -82,7 +80,7 @@ fi])dnl
if test $ac_cv_prog_gxx = yes; then GXX=yes; else GXX= ; fi
])dnl
dnl
define(AC_PROG_GCC_TRADITIONAL,
AC_DEFUN(AC_PROG_GCC_TRADITIONAL,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
if test $ac_cv_prog_gcc = yes; then
@ -106,7 +104,7 @@ Autoconf TCGETA'
fi
])dnl
dnl
define(AC_PROG_CC_C_O,
AC_DEFUN(AC_PROG_CC_C_O,
[if test "x$CC" != xcc; then
AC_MSG_CHECKING(whether $CC and cc understand -c and -o together)
else
@ -145,7 +143,7 @@ fi
])dnl
dnl
dnl Define SET_MAKE to set ${MAKE} if make doesn't.
define(AC_PROG_MAKE_SET,
AC_DEFUN(AC_PROG_MAKE_SET,
[AC_MSG_CHECKING(whether ${MAKE-make} sets \$MAKE)
set dummy ${MAKE-make}; ac_make=[$]2
AC_CACHE_VAL(ac_cv_prog_make_${ac_make}_set,
@ -173,15 +171,17 @@ fi
AC_SUBST([SET_MAKE])dnl
])dnl
dnl
define(AC_PROG_RANLIB, [AC_CHECK_PROG(RANLIB, ranlib, ranlib, :)])dnl
AC_DEFUN(AC_PROG_RANLIB,
[AC_CHECK_PROG(RANLIB, ranlib, ranlib, :)])dnl
dnl
define(AC_PROG_AWK, [AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])dnl
AC_DEFUN(AC_PROG_AWK,
[AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])dnl
dnl
define(AC_PROG_YACC, [AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])dnl
AC_DEFUN(AC_PROG_YACC,
[AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])dnl
dnl
define(AC_PROG_CPP,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(how to run the C preprocessor)
AC_DEFUN(AC_PROG_CPP,
[AC_MSG_CHECKING(how to run the C preprocessor)
if test -z "$CPP"; then
AC_CACHE_VAL(ac_cv_prog_CPP,
[ # This must be in double quotes, not single quotes, because CPP may get
@ -201,9 +201,8 @@ AC_MSG_RESULT($CPP)
AC_SUBST(CPP)dnl
])dnl
dnl
define(AC_PROG_CXXCPP,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(how to run the C++ preprocessor)
AC_DEFUN(AC_PROG_CXXCPP,
[AC_MSG_CHECKING(how to run the C++ preprocessor)
if test -z "$CXXCPP"; then
AC_CACHE_VAL(ac_cv_prog_CXXCPP,
[AC_LANG_SAVE[]dnl
@ -220,12 +219,11 @@ AC_SUBST(CXXCPP)dnl
dnl
dnl Require finding the C or C++ preprocessor, whichever is the
dnl current language.
define(AC_REQUIRE_CPP,
AC_DEFUN(AC_REQUIRE_CPP,
[ifelse(AC_LANG, C, [AC_REQUIRE([AC_PROG_CPP])], [AC_REQUIRE([AC_PROG_CXXCPP])])])dnl
dnl
define(AC_PROG_LEX,
[AC_PROVIDE([$0])dnl
AC_CHECK_PROG(LEX, flex, flex, lex)
AC_DEFUN(AC_PROG_LEX,
[AC_CHECK_PROG(LEX, flex, flex, lex)
AC_MSG_CHECKING(for $LEX library)
if test -z "$LEXLIB"
then
@ -237,7 +235,7 @@ fi
AC_MSG_RESULT($LEXLIB)
AC_SUBST(LEXLIB)])dnl
dnl
define(AC_DECL_YYTEXT,
AC_DEFUN(AC_DECL_YYTEXT,
[AC_REQUIRE_CPP()dnl
AC_REQUIRE([AC_PROG_LEX])dnl
AC_MSG_CHECKING(for yytext declaration)
@ -271,7 +269,7 @@ fi
AC_SUBST(LEX_OUTPUT_ROOT)dnl
])dnl
dnl
define(AC_PROG_INSTALL,
AC_DEFUN(AC_PROG_INSTALL,
[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
# Make sure to not get the incompatible SysV /etc/install and
# /usr/sbin/install, which might be in PATH before a BSD-like install,
@ -331,7 +329,7 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
AC_SUBST(INSTALL_DATA)dnl
])dnl
dnl
define(AC_PROG_LN_S,
AC_DEFUN(AC_PROG_LN_S,
[AC_MSG_CHECKING(whether ln -s works)
AC_CACHE_VAL(ac_cv_prog_LN_S,
[rm -f conftestdata
@ -351,7 +349,7 @@ fi
AC_SUBST(LN_S)dnl
])dnl
dnl
define(AC_PROG_RSH,
AC_DEFUN(AC_PROG_RSH,
[AC_MSG_CHECKING(for remote shell)
AC_CACHE_VAL(ac_cv_path_RSH,
[ac_cv_path_RSH=no
@ -379,7 +377,7 @@ dnl
dnl ### Checks for header files
dnl
dnl
define(AC_HEADER_STDC,
AC_DEFUN(AC_HEADER_STDC,
[AC_REQUIRE_CPP()dnl
AC_MSG_CHECKING(for ANSI C header files)
AC_CACHE_VAL(ac_cv_header_stdc,
@ -412,13 +410,14 @@ fi])dnl
AC_MSG_RESULT($ac_cv_header_stdc)
if test $ac_cv_header_stdc = yes; then
AC_DEFINE(STDC_HEADERS)
fi])dnl
fi
])dnl
dnl
define(AC_UNISTD_H,
AC_DEFUN(AC_UNISTD_H,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])dnl
AC_CHECK_HEADER(unistd.h, AC_DEFINE(HAVE_UNISTD_H))])dnl
dnl
define(AC_USG,
AC_DEFUN(AC_USG,
[AC_OBSOLETE([$0],
[; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])dnl
AC_MSG_CHECKING([for BSD string and memory functions])
@ -428,16 +427,17 @@ dnl
dnl
dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
dnl To avoid problems, don't check for gcc2 built-ins.
define(AC_MEMORY_H,
AC_DEFUN(AC_MEMORY_H,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])dnl
AC_MSG_CHECKING(whether string.h declares mem functions)
AC_EGREP_HEADER(memchr, string.h, ac_found=yes, ac_found=no)
AC_MSG_RESULT($ac_found)
if test $ac_found = no; then
AC_CHECK_HEADER(memory.h, [AC_DEFINE(NEED_MEMORY_H)])
fi])dnl
fi
])dnl
dnl
define(AC_HEADER_MAJOR,
AC_DEFUN(AC_HEADER_MAJOR,
[AC_MSG_CHECKING([for major, minor and makedev header])
AC_CACHE_VAL(ac_cv_header_major,
[AC_TRY_LINK([#include <sys/types.h>],
@ -455,9 +455,8 @@ sys/sysmacros.h) AC_DEFINE(MAJOR_IN_SYSMACROS) ;;
esac
])dnl
dnl
define(AC_HEADER_DIRENT,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(for directory library header)
AC_DEFUN(AC_HEADER_DIRENT,
[AC_MSG_CHECKING(for directory library header)
dnl We don't use AC_CHECK_HEADERS so we can stop when we get a match.
AC_CACHE_VAL(ac_cv_header_dir,
[ac_cv_header_dir=no
@ -488,9 +487,8 @@ fi
])dnl
dnl
dnl Obsolete.
define(AC_DIR_HEADER,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(for directory library header)
AC_DEFUN(AC_DIR_HEADER,
[AC_MSG_CHECKING(for directory library header)
AC_CACHE_VAL(ac_cv_header_dir,
[ac_cv_header_dir=no
for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
@ -519,7 +517,7 @@ if test $ac_cv_func_closedir_void = yes; then
fi
])dnl
dnl
define(AC_HEADER_STAT,
AC_DEFUN(AC_HEADER_STAT,
[AC_MSG_CHECKING(for broken stat file mode macros)
AC_CACHE_VAL(ac_cv_header_stat_broken,
[AC_EGREP_CPP([You lose], [#include <sys/types.h>
@ -551,7 +549,7 @@ if test $ac_cv_header_stat_broken = yes; then
fi
])dnl
dnl
define(AC_DECL_SYS_SIGLIST,
AC_DEFUN(AC_DECL_SYS_SIGLIST,
[AC_MSG_CHECKING([for sys_siglist declaration in signal.h or unistd.h])
AC_CACHE_VAL(ac_cv_decl_sys_siglist,
[AC_TRY_LINK([#include <sys/types.h>
@ -571,7 +569,7 @@ dnl
dnl ### Checks for typedefs
dnl
dnl
define(AC_TYPE_GETGROUPS,
AC_DEFUN(AC_TYPE_GETGROUPS,
[AC_REQUIRE([AC_TYPE_UID_T])dnl
AC_MSG_CHECKING(type of array argument to getgroups)
AC_CACHE_VAL(ac_cv_type_getgroups,
@ -604,9 +602,8 @@ AC_MSG_RESULT($ac_cv_type_getgroups)
AC_DEFINE_UNQUOTED(GETGROUPS_T, $ac_cv_type_getgroups)
])dnl
dnl
define(AC_TYPE_UID_T,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING(for uid_t in sys/types.h)
AC_DEFUN(AC_TYPE_UID_T,
[AC_MSG_CHECKING(for uid_t in sys/types.h)
AC_CACHE_VAL(ac_cv_type_uid_t,
[AC_EGREP_HEADER(uid_t, sys/types.h,
ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)])dnl
@ -617,20 +614,21 @@ if test $ac_cv_type_uid_t = no; then
fi
])dnl
dnl
define(AC_TYPE_SIZE_T, [AC_CHECK_TYPE(size_t, unsigned)])dnl
AC_DEFUN(AC_TYPE_SIZE_T,
[AC_CHECK_TYPE(size_t, unsigned)])dnl
dnl
define(AC_TYPE_PID_T, [AC_CHECK_TYPE(pid_t, int)])dnl
AC_DEFUN(AC_TYPE_PID_T,
[AC_CHECK_TYPE(pid_t, int)])dnl
dnl
define(AC_TYPE_OFF_T,
[AC_PROVIDE([$0])dnl
AC_CHECK_TYPE(off_t, long)])dnl
AC_DEFUN(AC_TYPE_OFF_T,
[AC_CHECK_TYPE(off_t, long)])dnl
dnl
define(AC_TYPE_MODE_T, [AC_CHECK_TYPE(mode_t, int)])dnl
AC_DEFUN(AC_TYPE_MODE_T,
[AC_CHECK_TYPE(mode_t, int)])dnl
dnl
dnl Note that identifiers starting with SIG are reserved by ANSI C.
define(AC_TYPE_SIGNAL,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING([return type of signal handlers])
AC_DEFUN(AC_TYPE_SIGNAL,
[AC_MSG_CHECKING([return type of signal handlers])
AC_CACHE_VAL(ac_cv_type_signal,
[AC_TRY_LINK([#include <sys/types.h>
#include <signal.h>
@ -647,7 +645,7 @@ dnl
dnl ### Checks for functions
dnl
dnl
define(AC_FUNC_MMAP,
AC_DEFUN(AC_FUNC_MMAP,
[AC_MSG_CHECKING(for working mmap)
AC_CACHE_VAL(ac_cv_func_mmap,
[AC_TRY_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
@ -723,14 +721,14 @@ if test $ac_cv_func_mmap = yes; then
fi
])dnl
dnl
define(AC_FUNC_VPRINTF,
AC_DEFUN(AC_FUNC_VPRINTF,
[AC_CHECK_FUNC(vprintf, AC_DEFINE(HAVE_VPRINTF))
if test "$ac_cv_func_vprintf" != yes; then
AC_CHECK_FUNC(_doprnt, AC_DEFINE(HAVE_DOPRNT))
fi
])dnl
dnl
define(AC_FUNC_VFORK,
AC_DEFUN(AC_FUNC_VFORK,
[AC_REQUIRE([AC_TYPE_PID_T])dnl
AC_CHECK_HEADER(vfork.h, AC_DEFINE(HAVE_VFORK_H))
AC_MSG_CHECKING(for working vfork)
@ -842,7 +840,7 @@ if test $ac_cv_func_vfork = no; then
fi
])dnl
dnl
define(AC_FUNC_WAIT3,
AC_DEFUN(AC_FUNC_WAIT3,
[AC_MSG_CHECKING(for wait3 that fills in rusage)
AC_CACHE_VAL(ac_cv_func_wait3,
[AC_TRY_RUN([#include <sys/types.h>
@ -878,7 +876,7 @@ if test $ac_cv_func_wait3 = yes; then
fi
])dnl
dnl
define(AC_FUNC_ALLOCA,
AC_DEFUN(AC_FUNC_ALLOCA,
[# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments. Useless!
AC_MSG_CHECKING([for working alloca.h])
@ -963,7 +961,7 @@ fi
AC_SUBST(ALLOCA)dnl
])dnl
dnl
define(AC_FUNC_GETLOADAVG,
AC_DEFUN(AC_FUNC_GETLOADAVG,
[# Some definitions of getloadavg require that the program be installed setgid.
NEED_SETGID=false
AC_SUBST(NEED_SETGID)dnl
@ -1059,7 +1057,7 @@ fi
AC_SUBST(KMEM_GROUP)dnl
])dnl
dnl
define(AC_FUNC_UTIME_NULL,
AC_DEFUN(AC_FUNC_UTIME_NULL,
[AC_MSG_CHECKING(whether utime accepts a null argument)
AC_CACHE_VAL(ac_cv_func_utime_null,
[rm -f conftestdata; > conftestdata
@ -1079,7 +1077,7 @@ if test $ac_cv_func_utime_null = yes; then
fi
])dnl
dnl
define(AC_FUNC_STRCOLL,
AC_DEFUN(AC_FUNC_STRCOLL,
[AC_MSG_CHECKING(for strcoll)
AC_CACHE_VAL(ac_cv_func_strcoll,
[AC_TRY_RUN([#include <string.h>
@ -1095,7 +1093,7 @@ if test $ac_cv_func_strcoll = yes; then
fi
])dnl
dnl
define(AC_FUNC_SETVBUF_REVERSED,
AC_DEFUN(AC_FUNC_SETVBUF_REVERSED,
[AC_MSG_CHECKING(whether setvbuf arguments are reversed)
AC_CACHE_VAL(ac_cv_func_setvbuf_reversed,
[AC_TRY_RUN([#include <stdio.h>
@ -1120,9 +1118,8 @@ dnl
dnl ### Checks for structure members
dnl
dnl
define(AC_STRUCT_TM,
[AC_PROVIDE([$0])dnl
AC_MSG_CHECKING([whether struct tm is in sys/time.h or time.h])
AC_DEFUN(AC_STRUCT_TM,
[AC_MSG_CHECKING([whether struct tm is in sys/time.h or time.h])
AC_CACHE_VAL(ac_cv_struct_tm,
[AC_TRY_LINK([#include <sys/types.h>
#include <time.h>],
@ -1134,7 +1131,7 @@ if test $ac_cv_struct_tm = sys/time.h; then
fi
])dnl
dnl
define(AC_HEADER_TIME,
AC_DEFUN(AC_HEADER_TIME,
[AC_MSG_CHECKING([whether time.h and sys/time.h may both be included])
AC_CACHE_VAL(ac_cv_header_time,
[AC_TRY_LINK([#include <sys/types.h>
@ -1147,7 +1144,7 @@ if test $ac_cv_header_time = yes; then
fi
])dnl
dnl
define(AC_STRUCT_TIMEZONE,
AC_DEFUN(AC_STRUCT_TIMEZONE,
[AC_REQUIRE([AC_STRUCT_TM])dnl
AC_MSG_CHECKING([for tm_zone in struct tm])
AC_CACHE_VAL(ac_cv_struct_tm_zone,
@ -1173,7 +1170,7 @@ extern char *tzname[]; /* RS6000 and others reject char **tzname. */
fi
])dnl
dnl
define(AC_STRUCT_ST_BLOCKS,
AC_DEFUN(AC_STRUCT_ST_BLOCKS,
[AC_MSG_CHECKING([for st_blocks in struct stat])
AC_CACHE_VAL(ac_cv_struct_st_blocks,
[AC_TRY_LINK([#include <sys/types.h>
@ -1188,7 +1185,7 @@ fi
AC_SUBST(LIBOBJS)dnl
])dnl
dnl
define(AC_STRUCT_ST_BLKSIZE,
AC_DEFUN(AC_STRUCT_ST_BLKSIZE,
[AC_MSG_CHECKING([for st_blksize in struct stat])
AC_CACHE_VAL(ac_cv_struct_st_blksize,
[AC_TRY_LINK([#include <sys/types.h>
@ -1200,7 +1197,7 @@ if test $ac_cv_struct_st_blksize = yes; then
fi
])dnl
dnl
define(AC_STRUCT_ST_RDEV,
AC_DEFUN(AC_STRUCT_ST_RDEV,
[AC_MSG_CHECKING([for st_rdev in struct stat])
AC_CACHE_VAL(ac_cv_struct_st_rdev,
[AC_TRY_LINK([#include <sys/types.h>
@ -1216,9 +1213,8 @@ dnl
dnl ### Checks for compiler characteristics
dnl
dnl
define(AC_C_CROSS,
[AC_PROVIDE([$0])dnl
# If we cannot run a trivial program, we must be cross compiling.
AC_DEFUN(AC_C_CROSS,
[# If we cannot run a trivial program, we must be cross compiling.
AC_MSG_CHECKING(whether cross-compiling)
AC_CACHE_VAL(ac_cv_c_cross,
[AC_TRY_RUN([main(){exit(0);}], ac_cv_c_cross=no, ac_cv_c_cross=yes)])dnl
@ -1226,7 +1222,7 @@ cross_compiling=$ac_cv_c_cross
AC_MSG_RESULT($ac_cv_c_cross)
])dnl
dnl
define(AC_C_CHAR_UNSIGNED,
AC_DEFUN(AC_C_CHAR_UNSIGNED,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_MSG_CHECKING(whether char is unsigned)
AC_CACHE_VAL(ac_cv_c_char_unsigned,
@ -1245,7 +1241,7 @@ if test $ac_cv_c_char_unsigned = yes && test "$GCC" != yes; then
fi
])dnl
dnl
define(AC_C_LONG_DOUBLE,
AC_DEFUN(AC_C_LONG_DOUBLE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_MSG_CHECKING(for long double)
AC_CACHE_VAL(ac_cv_c_long_double,
@ -1265,7 +1261,7 @@ if test $ac_cv_c_long_double = yes; then
fi
])dnl
dnl
define(AC_INT_16_BITS,
AC_DEFUN(AC_INT_16_BITS,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_SIZEOF(int)])
AC_MSG_CHECKING(integer size)
AC_TRY_RUN([main() { exit(sizeof(int) != 2); }],
@ -1273,7 +1269,7 @@ AC_TRY_RUN([main() { exit(sizeof(int) != 2); }],
AC_DEFINE(INT_16_BITS)], AC_MSG_RESULT(not 16 bits))
])dnl
dnl
define(AC_LONG_64_BITS,
AC_DEFUN(AC_LONG_64_BITS,
[AC_OBSOLETE([$0], [; instead use AC_CHECK_SIZEOF(long)])
AC_MSG_CHECKING(for 64-bit long ints)
AC_TRY_RUN([main() { exit(sizeof(long int) != 8); }],
@ -1281,7 +1277,7 @@ AC_TRY_RUN([main() { exit(sizeof(long int) != 8); }],
AC_DEFINE(LONG_64_BITS)], AC_MSG_RESULT(not 64 bits))
])dnl
dnl
define(AC_C_BIGENDIAN,
AC_DEFUN(AC_C_BIGENDIAN,
[AC_MSG_CHECKING(whether byte ordering is bigendian)
AC_CACHE_VAL(ac_cv_c_bigendian,
[AC_TRY_RUN([main () {
@ -1300,7 +1296,7 @@ if test $ac_cv_c_bigendian = yes; then
fi
])dnl
dnl
define(AC_C_ARG_ARRAY,
AC_DEFUN(AC_C_ARG_ARRAY,
[AC_MSG_CHECKING(whether the address of an argument can be used as an array)
AC_CACHE_VAL(ac_cv_c_arg_array,
[AC_TRY_RUN([main() {
@ -1321,7 +1317,7 @@ if test $ac_cv_c_arg_array = no; then
fi
])dnl
dnl
define(AC_C_INLINE,
AC_DEFUN(AC_C_INLINE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_MSG_CHECKING([for inline])
AC_CACHE_VAL(ac_cv_c_inline,
@ -1335,7 +1331,7 @@ if test $ac_cv_c_inline = no; then
AC_DEFINE(inline, __inline)
fi
])dnl
define(AC_C_CONST,
AC_DEFUN(AC_C_CONST,
[dnl This message is consistent in form with the other checking messages,
dnl and with the result message.
AC_MSG_CHECKING([for working const])
@ -1392,7 +1388,8 @@ dnl
dnl ### Checks for operating system services
dnl
dnl
define(AC_HAVE_POUNDBANG,
dnl This macro is an oddball -- the only specific test that takes args.
AC_DEFUN(AC_HAVE_POUNDBANG,
[AC_MSG_CHECKING(whether [#]! works in shell scripts)
AC_CACHE_VAL(ac_cv_sys_interpreter,
[echo '#!/bin/cat
@ -1414,10 +1411,10 @@ ifelse([$2], , , [else
])dnl
fi
])dnl
define(AC_SYS_REMOTE_TAPE,
AC_DEFUN(AC_SYS_REMOTE_TAPE,
[AC_CHECK_HEADER(sys/mtio.h, AC_DEFINE(HAVE_SYS_MTIO_H))
if test "$ac_cv_header_mtio_h" = yes; then
if test "$ac_cv_header_sys_mtio_h" = yes; then
AC_MSG_CHECKING(for remote tape header files)
AC_CACHE_VAL(ac_cv_header_rmt,
[AC_TRY_CPP([#include <sgtty.h>
@ -1430,7 +1427,7 @@ fi
AC_SUBST(PROGS)dnl
])dnl
dnl
define(AC_SYS_LONG_FILE_NAMES,
AC_DEFUN(AC_SYS_LONG_FILE_NAMES,
[AC_MSG_CHECKING(for long file names)
AC_CACHE_VAL(ac_cv_sys_long_file_names,
[ac_cv_sys_long_file_names=yes
@ -1461,7 +1458,7 @@ if test $ac_cv_sys_long_file_names = yes; then
fi
])dnl
dnl
define(AC_SYS_RESTARTABLE_SYSCALLS,
AC_DEFUN(AC_SYS_RESTARTABLE_SYSCALLS,
[AC_MSG_CHECKING(for restartable system calls)
AC_CACHE_VAL(ac_cv_sys_restartable_syscalls,
[AC_TRY_RUN(
@ -1486,9 +1483,8 @@ if test $ac_cv_sys_restartable_syscalls = yes; then
fi
])dnl
dnl
define(AC_PATH_X,
AC_DEFUN(AC_PATH_X,
[AC_REQUIRE_CPP()dnl Set CPP; we run AC_PATH_X_DIRECT conditionally.
AC_PROVIDE([$0])dnl
# If we find X, set shell vars x_includes and x_libraries to the paths.
no_x=yes
if test "x$with_x" != xno; then
@ -1525,7 +1521,7 @@ fi # No --with-x=no.
])dnl
dnl
dnl Internal subroutine of AC_PATH_X.
define(AC_PATH_X_XMKMF,
AC_DEFUN(AC_PATH_X_XMKMF,
[AC_CHECKING(for X include and library files with xmkmf)
rm -fr conftestdir
if mkdir conftestdir; then
@ -1559,7 +1555,7 @@ fi
])dnl
dnl
dnl Internal subroutine of AC_PATH_X.
define(AC_PATH_X_DIRECT,
AC_DEFUN(AC_PATH_X_DIRECT,
[AC_CHECKING(for X include and library files directly)
test -z "$x_direct_test_library" && x_direct_test_library=Xt
test -z "$x_direct_test_include" && x_direct_test_include=X11/Intrinsic.h
@ -1658,7 +1654,7 @@ do
done)])dnl
dnl
dnl Find additional X libraries, magic flags, etc.
define(AC_PATH_XTRA,
AC_DEFUN(AC_PATH_XTRA,
[AC_REQUIRE([AC_OS_ISC])dnl
AC_REQUIRE([AC_PATH_X])dnl
AC_CHECKING(for additional X libraries and flags)
@ -1715,10 +1711,9 @@ dnl ### Checks for UNIX variants
dnl These are kludges; we need a more systematic approach.
dnl
dnl
define(AC_OS_AIX,
AC_DEFUN(AC_OS_AIX,
[AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_BEFORE([$0], [AC_TRY_CPP])dnl
AC_MSG_CHECKING(for AIX)
AC_EGREP_CPP(yes,
[#ifdef _AIX
@ -1727,10 +1722,9 @@ AC_EGREP_CPP(yes,
], [AC_MSG_RESULT(yes); AC_DEFINE(_ALL_SOURCE)], AC_MSG_RESULT(no))
])dnl
dnl
define(AC_OS_MINIX,
AC_DEFUN(AC_OS_MINIX,
[AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_BEFORE([$0], [AC_TRY_CPP])dnl
AC_CHECK_HEADER(minix/config.h, MINIX=yes, MINIX=)
# The Minix shell can not assign to the same variable on the same line!
if test "$MINIX" = yes; then
@ -1740,11 +1734,9 @@ if test "$MINIX" = yes; then
fi
])dnl
dnl
define(AC_OS_ISC,
[AC_PROVIDE([$0])dnl
AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_DEFUN(AC_OS_ISC,
[AC_BEFORE([$0], [AC_TRY_LINK])dnl
AC_BEFORE([$0], [AC_TRY_RUN])dnl
AC_BEFORE([$0], [AC_TRY_CPP])dnl
AC_MSG_CHECKING(for POSIXized ISC)
if test -d /etc/conf/kconfig.d &&
grep _POSIX_VERSION [/usr/include/sys/unistd.h] >/dev/null 2>&1
@ -1763,14 +1755,14 @@ else
fi
])dnl
dnl
define(AC_OS_XENIX,
AC_DEFUN(AC_OS_XENIX,
[AC_REQUIRE([AC_DIR_HEADER])dnl
AC_MSG_CHECKING(for Xenix)
AC_EGREP_CPP(yes,
[#if defined(M_XENIX) && !defined(M_UNIX)
yes
#endif
], [XENIX=yes AC_MSG_RESULT(yes)], [XENIX= AC_MSG_RESULT(no)])
], [AC_MSG_RESULT(yes); XENIX=yes], [AC_MSG_RESULT(no); XENIX=])
if test "$XENIX" = yes; then
LIBS="$LIBS -lx"
case "$DEFS" in
@ -1780,14 +1772,14 @@ if test "$XENIX" = yes; then
fi
])dnl
dnl
define(AC_OS_SCO,
AC_DEFUN(AC_OS_SCO,
[AC_CHECK_LIB(intl, strftime, LIBS="$LIBS -lintl")
])dnl
dnl
define(AC_OS_IRIX,
AC_DEFUN(AC_OS_IRIX,
[AC_CHECK_LIB(sun, getmntent, LIBS="$LIBS -lsun")
])dnl
dnl
define(AC_OS_DYNIX,
AC_DEFUN(AC_OS_DYNIX,
[AC_CHECK_LIB(seq, getmntent, LIBS="$LIBS -lseq")
])dnl