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This commit is contained in:
David MacKenzie 1994-06-22 18:22:34 +00:00
parent 927557c3c9
commit c62b221691
9 changed files with 956 additions and 716 deletions
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2
Makefile.in
View File

@ -156,7 +156,7 @@ clean:
mostlyclean: clean
distclean: clean
rm -f Makefile config.status config.cache
rm -f Makefile config.status config.cache config.log
realclean: distclean
rm -f TAGS *.info*

18
NEWS
View File

@ -1,26 +1,32 @@
Major changes in release 2.0:
** New files:
* Comes with config.sub and config.guess.
* Comes with config.sub and config.guess, and uses them optionally.
* Uses config.cache to cache test results. An alternate cache file
can be selected with the --cache-file=FILE option.
* Uses optional shell scripts $exec_prefix/lib/config.site and
$prefix/lib/config.site to perform site or system specific initializations.
* configure saves compiler output to ./config.log for debugging.
** New macros:
* AC_CACHE_VAL to share results of tests between configure runs.
* AC_CONFIG_AUXDIR, AC_CANON_SYSTEM, AC_SUBST_FILE, AC_MAKE_LINKS to
* 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.
* AC_TEST_LINK which should be used instead of AC_COMPILE_CHECK, in
order to use results caching.
* AC_ARG_ENABLE and AC_ARG_WITH make AC_ENABLE and AC_WITH obsolete.
* AC_TEST_LINK, which obsoletes AC_COMPILE_CHECK.
* AC_TEST_RUN, which obsoletes AC_TEST_PROGRAM.
* AC_PREFIX_PROGRAM, which obsoletes AC_PREFIX.
* AC_ARG_ENABLE and AC_ARG_WITH, which obsolete AC_ENABLE and AC_WITH.
** Changed macros:
* AC_OUTPUT adds the "automatically generated" comment after "#!" lines,
not before them.
* AC_OUTPUT does not replace "prefix" and "exec_prefix" in generated
files when they are not enclosed in @ signs.
* AC_OUTPUT allows the optional environment variable CONFIG_STATUS to
override the file name "config.status".
* AC_PROG_INSTALL looks for install.sh in the directory specified by
AC_CONFIG_AUX, or srcdir or srcdir/.. or srcdir/../.. by default.
AC_CONFIG_AUXDIR, or srcdir or srcdir/.. or srcdir/../.. by default.
** New utilities:
* autoscan to generate a preliminary configure.in for a package by

242
acgeneral.m4
View File

@ -29,35 +29,16 @@ dnl
ifdef([__gnu__], , [errprint(Autoconf requires GNU m4
)m4exit(2)])dnl
dnl
dnl
dnl ### Utility functions for stamping the configure script.
dnl
dnl
define(AC_ACVERSION, 1.91)dnl
define(AC_ACVERSION, 1.93)dnl
dnl This is defined by the --version option of the autoconf script.
ifdef([AC_PRINT_VERSION], [errprint(Autoconf version AC_ACVERSION
)])dnl
dnl
dnl These are currently not used, for the sake of people who diff
dnl configure scripts and don't want spurious differences.
dnl But they are too clever to just delete.
dnl
define(AC_USER, [esyscmd(
changequote({,})dnl
# Extract the user name from the first pair of parentheses.
({ac_sedcmd='s/[^(]*(\([^)]*\)).*/\1/';}
changequote([,])dnl
whoami || id|sed "$ac_sedcmd") 2>/dev/null|tr -d '\012')])dnl
dnl
define(AC_HOST, [esyscmd((hostname || uname -n) 2>/dev/null|tr -d '\012')])dnl
dnl
define(AC_DATE, [esyscmd(date|tr -d '\012')])dnl
)m4exit(0)])dnl
dnl
dnl
dnl ### Controlling Autoconf operation
dnl
dnl
dnl Diversions:
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
@ -66,13 +47,9 @@ 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
dnl
dnl This is separate from AC_INIT to prevent GNU m4 1.0 from coredumping
dnl when AC_CONFIG_HEADER is used.
define(AC_NOTICE,
[# Guess values for system-dependent variables and create Makefiles.
dnl [#] Generated automatically using autoconf.
# Generated automatically using autoconf version] AC_ACVERSION [
dnl [#] by AC_USER@AC_HOST on AC_DATE
# Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
#
# This configure script is free software; you can redistribute it and/or
@ -91,12 +68,13 @@ dnl [#] by AC_USER@AC_HOST on AC_DATE
])dnl
dnl
define(AC_PARSEARGS,
[AC_BEFORE([$0], AC_ARG_ENABLE)dnl
AC_BEFORE([$0], AC_ARG_WITH)dnl
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
# Save the original args to write them into config.status later.
configure_args="[$]*"
# Omit internal or obsolete options to make the list less imposing.
# Omit some internal, obsolete, or unimplemented options to make the
# list less imposing.
changequote(,)dnl
ac_usage="Usage: configure [options] [host]
Options: [defaults in brackets after descriptions]
@ -130,12 +108,12 @@ changequote([,])dnl
# dashes changed to underlines.
build=NONE
cache_file=./config.cache
exec_prefix=
exec_prefix=NONE
host=NONE
no_create=
nonopt=NONE
norecursion=
prefix=
prefix=NONE
program_prefix=
program_suffix=
program_transform_name=
@ -382,8 +360,12 @@ AC_PREPARE($1)])dnl
dnl
dnl AC_PREPARE(UNIQUE-FILE-IN-SOURCE-DIR)
define(AC_PREPARE,
[AC_BEFORE([$0], AC_ARG_ENABLE)dnl
AC_BEFORE([$0], AC_ARG_WITH)dnl
[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
trap 'rm -fr conftest* confdefs* core $ac_clean_files; exit 1' 1 2 15
trap 'rm -fr confdefs* $ac_clean_files' 0
@ -392,8 +374,9 @@ trap 'rm -fr confdefs* $ac_clean_files' 0
# 1 file creation
# 2 errors and warnings
# 3 unused; some systems may open it to /dev/tty
# 4 checking for...
# 4 checking for... messages
# 5 test results
# 6 compiler messages
if test "$silent" = yes; then
exec 4>/dev/null
else
@ -404,6 +387,12 @@ if test "$verbose" = yes; then
else
exec 5>/dev/null
fi
exec 6>./config.log
echo "\
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
" 1>&6
# Save the original args if we used an alternate arg parser.
ac_configure_temp="${configure_args-[$]*}"
@ -458,7 +447,12 @@ if test ! -r $srcdir/$ac_unique_file; then
AC_ERROR(can not find sources in ${srcdir})
fi
fi
ifdef([AC_LIST_PREFIX_PROGRAM], [AC_PREFIX(AC_LIST_PREFIX_PROGRAM)])dnl
dnl Let the site file select an alternate cache file if it wants to.
AC_SITE_LOAD
AC_CACHE_LOAD
AC_LANG_C
undivert(AC_DIVERSION_ARG_ENABLE)dnl
undivert(AC_DIVERSION_ARG_WITH)dnl
@ -466,7 +460,8 @@ undivert(AC_DIVERSION_ARG_WITH)dnl
dnl
dnl AC_ARG_ENABLE(FEATURE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_ENABLE,
[divert(AC_DIVERSION_HELP_ENABLE)dnl
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_ENABLE)dnl
$2
divert(AC_DIVERSION_ARG_ENABLE)dnl
AC_ENABLE_INTERNAL([$1], [$3], [$4])dnl
@ -492,7 +487,8 @@ fi
dnl
dnl AC_ARG_WITH(PACKAGE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_WITH,
[divert(AC_DIVERSION_HELP_WITH)dnl
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_WITH)dnl
$2
divert(AC_DIVERSION_ARG_WITH)dnl
AC_WITH_INTERNAL([$1], [$3], [$4])dnl
@ -517,10 +513,10 @@ fi
])dnl
dnl
dnl AC_CONFIG_HEADER(HEADER-TO-CREATE ...)
define(AC_CONFIG_HEADER, [define(AC_LIST_HEADERS, $1)])dnl
define(AC_CONFIG_HEADER, [AC_PROVIDE([$0])define(AC_LIST_HEADERS, $1)])dnl
dnl
dnl AC_REVISION(REVISION-INFO)
define(AC_REVISION, [AC_REQUIRE([AC_BINSH])dnl
define(AC_REVISION, [AC_PROVIDE([$0])AC_REQUIRE([AC_BINSH])dnl
[# From configure.in] translit([$1],$")])dnl
dnl
dnl Subroutines of AC_PREREQ.
@ -543,16 +539,44 @@ dnl
dnl Complain and exit if the Autoconf version is less than $1.
dnl AC_PREREQ(VERSION)
define(AC_PREREQ,
[AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
[AC_PROVIDE([$0])dnl
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_REQUIRE([AC_CONFIG_AUXDIR_DEFAULT])dnl
[AC_PROVIDE([$0])dnl
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
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],[$1])])dnl
define(AC_PREFIX_INTERNAL,
[if test "x$prefix" = xNONE; then
changequote(<<,>>)dnl
define(<<AC_VAR_NAME>>, translit($1, [a-z], [A-Z]))dnl
changequote([,])dnl
AC_PROGRAM_PATH(AC_VAR_NAME, $1)
changequote(<<,>>)dnl
if test -n "$ac_cv_path_<<>>AC_VAR_NAME"; then
prefix=`echo $ac_cv_path_<<>>AC_VAR_NAME|sed 's%/[^/][^/]*/[^/][^/]*$%%'`
changequote([,])dnl
dnl test -z "$prefix" && prefix=/
AC_VERBOSE(setting installation directory prefix to ${prefix})
fi
fi
undefine(AC_VAR_NAME)dnl
])dnl
define(AC_PREFIX,
[AC_OBSOLETE([$0], [; instead use AC_PREFIX_PROGRAM before AC_INIT])dnl
AC_PREFIX_INTERNAL([$1])])dnl
dnl
dnl
dnl ### Canonicalizing the system type
dnl
@ -560,21 +584,21 @@ dnl
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_AUXDIR(DIR)
define(AC_CONFIG_AUXDIR,
[AC_CONFIG_AUXDIR_DIRS($1 ${srcdir}/$1)])dnl
dnl AC_CONFIG_AUX_DIR(DIR)
define(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_AUXDIR_DEFAULT,
[AC_CONFIG_AUXDIR_DIRS(${srcdir} ${srcdir}/.. ${srcdir}/../..)])dnl
define(AC_CONFIG_AUX_DIR_DEFAULT,
[AC_CONFIG_AUX_DIRS(${srcdir} ${srcdir}/.. ${srcdir}/../..)])dnl
dnl
dnl Internal subroutine.
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_AUXDIR_DIRS(DIR ...)
define(AC_CONFIG_AUXDIR_DIRS,
dnl AC_CONFIG_AUX_DIRS(DIR ...)
define(AC_CONFIG_AUX_DIRS,
[ac_aux_dir=
for ac_dir in $1; do
if test -f $ac_dir/install.sh; then
@ -588,12 +612,12 @@ ac_config_guess=${ac_aux_dir}/config.guess
ac_config_sub=${ac_aux_dir}/config.sub
ac_configure=${ac_aux_dir}/configure # This should be Cygnus configure.
ac_install_sh="${ac_aux_dir}/install.sh -c"
AC_PROVIDE([AC_CONFIG_AUXDIR_DEFAULT])dnl
AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
])dnl
dnl
dnl Canonicalize the host, target, and build system types.
define(AC_CANON_SYSTEM,
[AC_REQUIRE([AC_CONFIG_AUXDIR_DEFAULT])dnl
define(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:
# configure --host=HOST --target=TARGET --build=BUILD NONOPT
@ -623,14 +647,14 @@ if ${ac_config_sub} sun4 >/dev/null 2>&1; then :
else AC_ERROR(can not run ${ac_config_sub})
fi
AC_CANON_HOST
AC_CANON_TARGET
AC_CANON_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AC_CANONICAL_BUILD
])dnl
dnl
dnl Subroutines of AC_CANON_SYSTEM.
dnl Subroutines of AC_CANONICAL_SYSTEM.
dnl
define(AC_CANON_HOST,
define(AC_CANONICAL_HOST,
[AC_CHECKING(host type)
case "${host_alias}" in
@ -653,7 +677,7 @@ AC_SUBST(host)dnl
AC_SUBST(host_alias)dnl
])dnl
dnl
define(AC_CANON_TARGET,
define(AC_CANONICAL_TARGET,
[AC_CHECKING(target type)
case "${target_alias}" in
@ -673,7 +697,7 @@ AC_SUBST(target)dnl
AC_SUBST(target_alias)dnl
])dnl
dnl
define(AC_CANON_BUILD,
define(AC_CANONICAL_BUILD,
[AC_CHECKING(build type)
case "${build_alias}" in
@ -690,30 +714,38 @@ AC_SUBST(build)dnl
AC_SUBST(build_alias)dnl
])dnl
dnl
dnl Put the contents of file $2 into Makefile variable $1.
dnl Useful for inserting Makefile fragments into Makefiles.
dnl AC_SUBST_FILE(VARIABLE, FILE)
define(AC_SUBST_FILE,
[AC_SUBST($1)dnl
if test -f ${srcdir}/$2; then
AC_VERBOSE(using $2 for $1)
$1=`cat ${srcdir}/$2`
fi
])dnl
dnl
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_MAKE_LINKS(LINK ..., FILE ...)
define(AC_MAKE_LINKS,
dnl AC_LINK_FILES(LINK ..., FILE ...)
define(AC_LINK_FILES,
[define([AC_LIST_LINKS],[$1])define([AC_LIST_FILES],[$2])])dnl
dnl
dnl
dnl ### Caching test results
dnl
dnl
dnl Look for site or system specific initialization scripts.
define(AC_SITE_LOAD,
[ac_site_dirs=/usr/local
if test "x$prefix" != xNONE; then
ac_site_dirs=$prefix
fi
# System dependent files override system independent ones in case of conflict.
if test "x$exec_prefix" != xNONE && test "x$exec_prefix" != "x$prefix"; then
ac_site_dirs="$ac_site_dirs $exec_prefix"
fi
for ac_site_dir in $ac_site_dirs; do
ac_site_file=$ac_site_dir/lib/config.site
if test -r "$ac_site_file"; then
AC_VERBOSE(loading site initialization script $ac_site_file)
. $ac_site_file
fi
done
])dnl
dnl
define(AC_CACHE_LOAD,
[if test -r $cache_file; then
[if test -r "$cache_file"; then
AC_VERBOSE(loading test results from cache file $cache_file)
. $cache_file
else
@ -728,7 +760,7 @@ cat > $cache_file <<\CEOF
# This file is a shell script that caches the results of configure
# tests run on this system so they can be shared between configure
# scripts and configure runs. It is not useful on other systems.
# If its contents are invalid for some reason, you may edit or delete it.
# If its contents are invalid for some reason, you may delete or edit it.
#
# By default, configure uses ./config.cache as the cache file,
# creating it if it does not exist already. You can give configure
@ -739,7 +771,8 @@ cat > $cache_file <<\CEOF
# --recheck option to rerun configure.
CEOF
changequote(,)dnl
set | sed -n "/^[a-zA-Z0-9_]*_cv_/s/=\(.*\)/='\1'/p" >> $cache_file
dnl Allow a site initialization script to override cache values.
set | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
changequote([,])dnl
fi])dnl
dnl
@ -888,7 +921,7 @@ 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 $LIBS >/dev/null 2>&1'
ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&6 2>&6'
])dnl
dnl
define(AC_LANG_CPLUSPLUS,
@ -897,7 +930,7 @@ 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}'
ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS >/dev/null 2>&1'
ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&6 2>&6'
])dnl
dnl
dnl Push the current language on a stack.
@ -940,25 +973,25 @@ define(AC_PROGRAM_CHECK,
[# Extract the first word of "$2", so it can be a program name with args.
set dummy $2; ac_word=[$]2
AC_CHECKING([for $ac_word])
AC_CACHE_VAL(ac_cv_program_$1,
AC_CACHE_VAL(ac_cv_prog_$1,
[if test -n "[$]$1"; then
ac_cv_program_$1="[$]$1" # Let the user override the test.
ac_cv_prog_$1="[$]$1" # Let the user override the test.
else
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
for ac_dir in $PATH; do
test -z "$ac_dir" && ac_dir=.
if test -f $ac_dir/$ac_word; then
ac_cv_program_$1="$3"
ac_cv_prog_$1="$3"
break
fi
done
IFS="$ac_save_ifs"
dnl If no 4th arg is given, leave the cache variable unset,
dnl so AC_PROGRAMS_CHECK will keep looking.
ifelse([$4],,, [ test -z "[$]ac_cv_program_$1" && ac_cv_program_$1="$4"
ifelse([$4],,, [ test -z "[$]ac_cv_prog_$1" && ac_cv_prog_$1="$4"
])dnl
fi])dnl
$1="$ac_cv_program_$1"
$1="$ac_cv_prog_$1"
test -n "[$]$1" && AC_VERBOSE(setting $1 to [$]$1)
AC_SUBST($1)dnl
])dnl
@ -1018,28 +1051,6 @@ done
ifelse([$3],,, [test -n "[$]$1" || $1="$3"
])])dnl
dnl
dnl Guess the value for the `prefix' variable by looking for
dnl the argument program along PATH and taking its parent.
dnl Example: if the argument is `gcc' and we find /usr/local/gnu/bin/gcc,
dnl set `prefix' to /usr/local/gnu.
dnl AC_PREFIX(PROGRAM)
define(AC_PREFIX,
[if test -z "$prefix"; then
changequote(<<,>>)dnl
define(<<AC_VAR_NAME>>, translit($1, [a-z], [A-Z]))dnl
changequote([,])dnl
AC_PROGRAM_PATH(AC_VAR_NAME, $1)
changequote(<<,>>)dnl
if test -n "$ac_cv_path_<<>>AC_VAR_NAME"; then
prefix=`echo $ac_cv_path_<<>>AC_VAR_NAME|sed 's%/[^/][^/]*/[^/][^/]*$%%'`
changequote([,])dnl
test -z "$prefix" && prefix=/
AC_VERBOSE(setting installation directory prefix to ${prefix})
fi
fi
undefine(AC_VAR_NAME)dnl
])dnl
dnl
dnl AC_HAVE_LIBRARY(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
define(AC_HAVE_LIBRARY, [dnl
changequote(/,/)dnl
@ -1106,7 +1117,8 @@ 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
AC_OBSOLETE([$0], [; instead use AC_TEST_LINK])dnl
dnl It's actually ok to use this, if you don't care about caching.
dnl AC_OBSOLETE([$0], [; instead use AC_TEST_LINK])dnl
ifelse([$1], , , [AC_CHECKING([for $1])
])dnl
AC_TEST_LINK([$2], [$3], [$4], [$5])dnl
@ -1134,14 +1146,15 @@ fi
rm -f conftest*]
)dnl
dnl
dnl AC_TEST_PROGRAM(PROGRAM, ACTION-IF-TRUE [, ACTION-IF-FALSE
dnl [, ACTION-IF-CROSS-COMPILING]])
define(AC_TEST_PROGRAM,
dnl AC_TEST_RUN(PROGRAM, ACTION-IF-TRUE [, ACTION-IF-FALSE
dnl [, ACTION-IF-CROSS-COMPILING]])
define(AC_TEST_RUN,
[AC_PROVIDE([$0])dnl
AC_REQUIRE([AC_CROSS_CHECK])dnl
if test -n "$cross_compiling"; then
ifelse([$4], , AC_ERROR(can not run test program while cross compiling),
[$4
[AC_VERBOSE(using default for cross-compiling)
$4
])
else
cat > conftest.${ac_ext} <<EOF
@ -1157,6 +1170,9 @@ ifelse([$3], , , [else
fi
fi
rm -fr conftest*])dnl
dnl Obsolete name, which is less clear about what the macro does,
dnl but is otherwise ok to use.
define(AC_TEST_PROGRAM, [AC_TEST_RUN([$1], [$2], [$3], [$4])])dnl
dnl
dnl AC_TEST_CPP(INCLUDES, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_TEST_CPP,
@ -1202,7 +1218,8 @@ dnl AC_FUNC_CHECK(FUNCTION, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_FUNC_CHECK,
[AC_CHECKING([for $1])
AC_CACHE_VAL(ac_cv_func_$1,
[AC_TEST_LINK([#include <ctype.h>], [
[AC_TEST_LINK(
[#include <ctype.h> /* Arbitrary system header to define __stub macros. */], [
/* The GNU C library defines this for functions which it implements
to always fail with ENOSYS. Some functions are actually named
something starting with __ and the normal name is an alias. */
@ -1266,15 +1283,14 @@ define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
changequote([,])dnl
AC_CHECKING(size of $1)
AC_CACHE_VAL(AC_CV_NAME,
[dnl If cross-compiling, the caller has to decide what to do; we can't.
AC_TEST_PROGRAM([#include <stdio.h>
[AC_TEST_RUN([#include <stdio.h>
main()
{
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
fprintf(f, "%d\n", sizeof($1));
exit(0);
}], AC_CV_NAME=`cat conftestval`, AC_ERROR(can not determine size of $1))])dnl
}], AC_CV_NAME=`cat conftestval`)])dnl
AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME)
undefine(AC_TYPE_NAME)dnl
undefine(AC_CV_NAME)dnl
@ -1288,9 +1304,9 @@ dnl AC_OUTPUT([FILE...] [,EXTRA-CMDS])
define(AC_OUTPUT,
[AC_CACHE_SAVE
test -z "$prefix" && prefix=/usr/local
test "x$prefix" = xNONE && prefix=/usr/local
# Let make expand exec_prefix.
test -z "$exec_prefix" && exec_prefix='${prefix}'
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
# Any assignment to VPATH causes Sun make to only execute
# the first set of double-colon rules, so remove it if not needed.

133
acspecific.m4
View File

@ -28,58 +28,60 @@ define(AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_PROVIDE([$0])dnl
AC_PROGRAM_CHECK(CC, gcc, gcc, cc)
# Find out if we are using GNU C, under whatever name.
cat > conftest.c <<EOF
AC_CACHE_VAL(ac_cv_prog_gcc,
[cat > conftest.c <<EOF
#ifdef __GNUC__
yes
#endif
EOF
${CC-cc} -E conftest.c > conftest.out 2>&1
if egrep yes conftest.out >/dev/null 2>&1; then
GCC=yes
if ${CC-cc} -E conftest.c 2>&6 | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gcc=yes
else
GCC=
fi
rm -f conftest*
ac_cv_prog_gcc=no
fi])dnl
if test "$ac_cv_prog_gcc" = yes; then GCC=yes; else GCC= ; fi
])dnl
dnl
define(AC_PROG_CXX,
[AC_BEFORE([$0],[AC_PROG_CXXCPP])dnl
AC_PROVIDE([$0])dnl
AC_PROGRAMS_CHECK(CXX, $CCC c++ g++ gcc CC cxx, gcc)
# Find out if we are using GNU C++, under whatever name.
cat > conftest.C <<EOF
AC_CACHE_VAL(ac_cv_prog_gxx,
[cat > conftest.C <<EOF
#ifdef __GNUC__
yes
#endif
EOF
${CXX-gcc} -E conftest.C > conftest.out 2>&1
if egrep yes conftest.out >/dev/null 2>&1; then
GXX=yes
if ${CXX-gcc} -E conftest.C 2>&6 | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gxx=yes
else
GXX=
fi
rm -f conftest*
ac_cv_prog_gxx=no
fi])dnl
if test "$ac_cv_prog_gxx" = yes; then GXX=yes; else GXX= ; fi
])dnl
dnl
define(AC_GCC_TRADITIONAL,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
if test "$GCC" = yes; then
if test "$ac_cv_prog_gcc" = yes; then
AC_CHECKING(whether -traditional is needed)
changequote(,)dnl
ac_pattern="Autoconf.*'x'"
changequote([,])dnl
AC_CACHE_VAL(ac_cv_prog_gcc_traditional,
[ ac_pattern="Autoconf.*'x'"
ac_prog='#include <sgtty.h>
Autoconf TIOCGETP'
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_need_trad=yes, ac_need_trad=no)
AC_PROGRAM_EGREP($ac_pattern, $ac_prog,
ac_cv_prog_gcc_traditional=yes, ac_cv_prog_gcc_traditional=no)
if test "$ac_need_trad" = no; then
if test "$ac_cv_prog_gcc_traditional" = no; then
ac_prog='#include <termio.h>
Autoconf TCGETA'
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_need_trad=yes)
fi
if test "$ac_need_trad" = yes; then
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_cv_prog_gcc_traditional=yes)
fi])dnl
if test "$ac_cv_prog_gcc_traditional" = yes; then
CC="$CC -traditional"
AC_VERBOSE(setting CC to $CC)
fi
@ -96,15 +98,15 @@ echo 'foo(){}' > conftest.c
# Make sure it works both with $CC and with simple cc.
# We do the test twice because some compilers refuse to overwrite an
# existing .o file with -o, though they will create one.
if ${CC-cc} -c conftest.c -o conftest.o >/dev/null 2>&1 \
&& test -f conftest.o && ${CC-cc} -c conftest.c -o conftest.o >/dev/null 2>&1
if ${CC-cc} -c conftest.c -o conftest.o 1>&6 2>&6 &&
test -f conftest.o && ${CC-cc} -c conftest.c -o conftest.o 1>&6 2>&6
then
if test "x$CC" != xcc; then
# Test first that cc exists at all.
if cc -c conftest.c >/dev/null 2>&1
if cc -c conftest.c 1>&6 2>&6
then
if cc -c conftest.c -o conftest2.o >/dev/null 2>&1 && \
test -f conftest2.o && cc -c conftest.c -o conftest2.o >/dev/null 2>&1
if cc -c conftest.c -o conftest2.o 1>&6 2>&6 &&
test -f conftest2.o && cc -c conftest.c -o conftest2.o 1>&6 2>&6
then
:
else
@ -230,7 +232,7 @@ AC_SUBST(LEX_OUTPUT_ROOT)dnl
])dnl
dnl
define(AC_PROG_INSTALL,
[AC_REQUIRE([AC_CONFIG_AUX_DEFAULT])dnl
[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,
# or the SunOS /usr/etc/install directory, or the AIX /bin/install,
@ -249,7 +251,7 @@ define(AC_PROG_INSTALL,
# by make from ./install.sh.
AC_CHECKING(for a BSD compatible install)
if test -z "${INSTALL}"; then
AC_CACHE_VAL(ac_cv_path_INSTALL,
AC_CACHE_VAL(ac_cv_path_install,
[ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
for ac_dir in $PATH; do
case "$ac_dir" in
@ -264,7 +266,7 @@ AC_CACHE_VAL(ac_cv_path_INSTALL,
# OSF/1 installbsd also uses dspmsg, but is usable.
:
else
ac_cv_path_INSTALL="$ac_dir/$ac_prog -c"
ac_cv_path_install="$ac_dir/$ac_prog -c"
break 2
fi
fi
@ -274,8 +276,8 @@ AC_CACHE_VAL(ac_cv_path_INSTALL,
done
IFS="$ac_save_ifs"
# As a last resort, use the slow shell script.
test -z "$ac_cv_path_INSTALL" && ac_cv_path_INSTALL="$ac_install_sh"])dnl
INSTALL="$ac_cv_path_INSTALL"
test -z "$ac_cv_path_install" && ac_cv_path_install="$ac_install_sh"])dnl
INSTALL="$ac_cv_path_install"
fi
AC_SUBST(INSTALL)dnl
AC_VERBOSE(setting INSTALL to $INSTALL)
@ -348,7 +350,7 @@ fi
if test "$ac_stdc_hdrs" = yes; then
# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
AC_TEST_PROGRAM([#include <ctype.h>
AC_TEST_RUN([#include <ctype.h>
#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
#define XOR(e,f) (((e) && !(f)) || (!(e) && (f)))
@ -402,14 +404,12 @@ AC_DIR_HEADER_CHECK(sys/dir.h, SYSDIR)
AC_DIR_HEADER_CHECK(ndir.h, NDIR)
AC_CHECKING(for closedir return value)
AC_TEST_PROGRAM([#include <sys/types.h>
AC_TEST_RUN([#include <sys/types.h>
#include <$ac_dir_header>
int closedir(); main() { exit(closedir(opendir(".")) != 0); }], ,
AC_DEFINE(VOID_CLOSEDIR))
])dnl
dnl Subroutine of AC_DIR_HEADER.
dnl ??? I tried to put this define inside AC_DIR_HEADER, but when I did
dnl that, $1 and $2 did not get expanded. --roland
dnl Check if $1 is the winning directory library header file.
dnl It must not only exist, but also correctly define the `DIR' type.
dnl If it is really winning, define $2 and set shell var `ac_dir_header' to $1.
@ -486,7 +486,7 @@ main()
exit ((n > 0 && gidset[n] != val.gval) ? 1 : 0);
}'
changequote([,])dnl
AC_TEST_PROGRAM([$ac_prog],
AC_TEST_RUN([$ac_prog],
AC_DEFINE(GETGROUPS_T, gid_t), AC_DEFINE(GETGROUPS_T, int))
])dnl
dnl
@ -535,7 +535,7 @@ dnl
dnl
define(AC_MMAP, [
AC_CHECKING(for working mmap)
AC_TEST_PROGRAM([/* Thanks to Mike Haertel and Jim Avera for this test. */
AC_TEST_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
#include <sys/types.h>
#include <fcntl.h>
#include <sys/mman.h>
@ -605,12 +605,9 @@ main()
])dnl
dnl
define(AC_VPRINTF,
[AC_CHECKING([for vprintf])
AC_TEST_LINK( , [vprintf();],
[ac_have_vprintf=yes AC_DEFINE(HAVE_VPRINTF)], ac_have_vprintf=no)
if test "$ac_have_vprintf" = no; then
AC_CHECKING([for _doprnt])
AC_TEST_LINK( , [_doprnt();], AC_DEFINE(HAVE_DOPRNT))
[AC_FUNC_CHECK(vprintf, AC_DEFINE(HAVE_VPRINTF))
if test "$ac_cv_func_vprintf" != yes; then
AC_FUNC_CHECK(_doprnt, AC_DEFINE(HAVE_DOPRNT))
fi
])dnl
dnl
@ -619,7 +616,7 @@ define(AC_VFORK,
AC_HEADER_CHECK(vfork.h, AC_DEFINE(HAVE_VFORK_H))
AC_CHECKING(for working vfork)
AC_REQUIRE([AC_RETSIGTYPE])
AC_TEST_PROGRAM([/* Thanks to Paul Eggert for this test. */
AC_TEST_RUN([/* Thanks to Paul Eggert for this test. */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
@ -704,7 +701,7 @@ main() {
dnl
define(AC_WAIT3,
[AC_CHECKING(for wait3 that fills in rusage)
AC_TEST_PROGRAM([#include <sys/types.h>
AC_TEST_RUN([#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
@ -749,10 +746,12 @@ ac_decl="#ifdef __GNUC__
#ifdef _AIX
#pragma alloca
#else
#ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#endif
#endif
#endif
#endif
"
AC_CHECKING([for alloca])
AC_TEST_LINK($ac_decl,
@ -780,7 +779,7 @@ AC_FUNC_CHECK([GETB67],AC_DEFINE([CRAY_STACKSEG_END],[GETB67]),
AC_FUNC_CHECK([getb67],AC_DEFINE([CRAY_STACKSEG_END],[getb67])))))
AC_CHECKING(stack direction for C alloca)
AC_TEST_PROGRAM([find_stack_direction ()
AC_TEST_RUN([find_stack_direction ()
{
static char *addr = 0;
auto char dummy;
@ -889,7 +888,7 @@ define(AC_UTIME_NULL,
[AC_CHECKING(utime with null argument)
rm -f conftestdata; > conftestdata
# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
AC_TEST_PROGRAM([#include <sys/types.h>
AC_TEST_RUN([#include <sys/types.h>
#include <sys/stat.h>
main() {
struct stat s, t;
@ -901,7 +900,7 @@ rm -f core
])dnl
dnl
define(AC_STRCOLL, [AC_CHECKING(for strcoll)
AC_TEST_PROGRAM([#include <string.h>
AC_TEST_RUN([#include <string.h>
main ()
{
exit (strcoll ("abc", "def") >= 0 ||
@ -911,7 +910,7 @@ main ()
dnl
define(AC_SETVBUF_REVERSED,
[AC_CHECKING(whether setvbuf arguments are reversed)
AC_TEST_PROGRAM([#include <stdio.h>
AC_TEST_RUN([#include <stdio.h>
/* If setvbuf has the reversed format, exit 0. */
main () {
/* This call has the arguments reversed.
@ -999,14 +998,14 @@ define(AC_CROSS_CHECK,
[AC_PROVIDE([$0])dnl
AC_CHECKING(whether cross-compiling)
# If we cannot run a trivial program, we must be cross compiling.
AC_TEST_PROGRAM([main(){exit(0);}], cross_compiling=, cross_compiling=yes)
AC_TEST_RUN([main(){exit(0);}], cross_compiling=, cross_compiling=yes)
if test "$cross_compiling" = yes; then
AC_VERBOSE(we are cross-compiling)
fi])dnl
dnl
define(AC_CHAR_UNSIGNED,
[AC_CHECKING(for unsigned characters)
AC_TEST_PROGRAM(
AC_TEST_RUN(
[/* volatile prevents gcc2 from optimizing the test away on sparcs. */
#if !__STDC__
#define volatile
@ -1023,10 +1022,10 @@ dnl
define(AC_LONG_DOUBLE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_CHECKING(for long double)
if test -n "$GCC"; then
if test "$GCC" = yes; then
AC_DEFINE(HAVE_LONG_DOUBLE)
else
AC_TEST_PROGRAM([int main() {
AC_TEST_RUN([int main() {
/* The Stardent Vistra knows sizeof(long double), but does not support it. */
long double foo = 0.0;
/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
@ -1038,20 +1037,20 @@ dnl
define(AC_INT_16_BITS,
[AC_OBSOLETE([$0], [; instead use AC_SIZEOF_TYPE(int)])
AC_CHECKING(integer size)
AC_TEST_PROGRAM([main() { exit(sizeof(int) != 2); }],
AC_TEST_RUN([main() { exit(sizeof(int) != 2); }],
AC_DEFINE(INT_16_BITS))
])dnl
dnl
define(AC_LONG_64_BITS,
[AC_OBSOLETE([$0], [; instead use AC_SIZEOF_TYPE(long)])
AC_CHECKING(for 64-bit long ints)
AC_TEST_PROGRAM([main() { exit(sizeof(long int) != 8); }],
AC_TEST_RUN([main() { exit(sizeof(long int) != 8); }],
AC_DEFINE(LONG_64_BITS))
])dnl
dnl
define(AC_WORDS_BIGENDIAN,
[AC_CHECKING(byte ordering)
AC_TEST_PROGRAM([main () {
AC_TEST_RUN([main () {
/* Are we little or big endian? From Harbison&Steele. */
union
{
@ -1065,7 +1064,7 @@ AC_TEST_PROGRAM([main () {
dnl
define(AC_ARG_ARRAY,
[AC_CHECKING(whether the address of an argument can be used as an array)
AC_TEST_PROGRAM([main() {
AC_TEST_RUN([main() {
/* Return 0 iff arg arrays are ok. */
exit(!x(1, 2, 3, 4));
}
@ -1186,7 +1185,7 @@ test "$ac_some_dir_failed" = yes || AC_DEFINE(HAVE_LONG_FILE_NAMES)
dnl
define(AC_RESTARTABLE_SYSCALLS,
[AC_CHECKING(for restartable system calls)
AC_TEST_PROGRAM(
AC_TEST_RUN(
[/* Exit 0 (true) if wait returns something other than -1,
i.e. the pid of the child, which means that wait was restarted
after getting the signal. */
@ -1373,8 +1372,8 @@ fi
# It would also be nice to do this for all -L options, not just this one.
if test -n "$x_libraries"; then
X_LIBS="$X_LIBS -L$x_libraries"
if test "`(uname) 2>/dev/null`" = SunOS \
&& uname -r | grep '^5' >/dev/null; then
if test "`(uname) 2>/dev/null`" = SunOS &&
uname -r | grep '^5' >/dev/null; then
X_LIBS="$X_LIBS -R$x_libraries"
fi
fi
@ -1410,13 +1409,13 @@ AC_SUBST(X_EXTRA_LIBS)dnl
dnl
dnl
dnl ### Checks for UNIX variants
dnl These are kludges; we need a better approach.
dnl These are kludges; we need a more systematic approach.
dnl
dnl
define(AC_AIX,
[AC_CHECKING(for AIX)
AC_BEFORE([$0], [AC_TEST_LINK])dnl
AC_BEFORE([$0], [AC_TEST_PROGRAM])dnl
AC_BEFORE([$0], [AC_TEST_RUN])dnl
AC_BEFORE([$0], [AC_TEST_CPP])dnl
AC_PROGRAM_EGREP(yes,
[#ifdef _AIX
@ -1427,7 +1426,7 @@ AC_PROGRAM_EGREP(yes,
dnl
define(AC_MINIX,
[AC_BEFORE([$0], [AC_TEST_LINK])dnl
AC_BEFORE([$0], [AC_TEST_PROGRAM])dnl
AC_BEFORE([$0], [AC_TEST_RUN])dnl
AC_BEFORE([$0], [AC_TEST_CPP])dnl
AC_HEADER_CHECK(minix/config.h, MINIX=yes, MINIX=)
# The Minix shell ca not assign to the same variable on the same line!
@ -1441,7 +1440,7 @@ dnl
define(AC_ISC_POSIX,
[AC_PROVIDE([$0])dnl
AC_BEFORE([$0], [AC_TEST_LINK])dnl
AC_BEFORE([$0], [AC_TEST_PROGRAM])dnl
AC_BEFORE([$0], [AC_TEST_RUN])dnl
AC_BEFORE([$0], [AC_TEST_CPP])dnl
AC_CHECKING(for POSIXized ISC)
if test -d /etc/conf/kconfig.d &&
@ -1449,7 +1448,7 @@ if test -d /etc/conf/kconfig.d &&
then
ISC=yes # If later tests want to check for ISC.
AC_DEFINE(_POSIX_SOURCE)
if test -n "$GCC"; then
if test "$GCC" = yes; then
CC="$CC -posix"
else
CC="$CC -Xp"

450
autoconf.texi
View File

@ -6,9 +6,9 @@
@c @setchapternewpage odd
@c %**end of header
@set EDITION 1.91
@set VERSION 1.91
@set UPDATED May 1994
@set EDITION 1.93
@set VERSION 1.93
@set UPDATED June 1994
@iftex
@finalout
@ -91,17 +91,17 @@ package. This is edition @value{EDITION}, for Autoconf version @value{VERSION}.
@c The master menu, created with texinfo-master-menu, goes here.
@menu
* Introduction:: Autoconf's purpose, strengths, and weaknesses.
* Distributing:: Legal restrictions on Autoconf output.
* Making configure Scripts:: How to organize and produce Autoconf scripts.
* Specific Tests:: Macros that check for particular features.
* General Purpose Macros:: Macros that check for kinds of features.
* Writing Macros:: How to add your own macros to Autoconf.
* Makefiles:: Information Autoconf uses in @file{Makefile}s.
* Invoking configure:: How to use the Autoconf output.
* Example:: Sample Autoconf input files.
* Preprocessor Symbol Index:: Index of C preprocessor symbols defined.
* Macro Index:: Index of Autoconf macros.
* Introduction:: Autoconf's purpose, strengths, and weaknesses.
* Distributing:: Legal restrictions on Autoconf output.
* Making configure Scripts:: How to organize and produce Autoconf scripts.
* Specific Tests:: Macros that check for particular features.
* General Purpose Macros:: Macros that check for kinds of features.
* Writing Macros:: How to add your own macros to Autoconf.
* Makefiles:: Information Autoconf uses in @file{Makefile}s.
* Invoking configure:: How to use the Autoconf output.
* Example:: Sample Autoconf input files.
* Preprocessor Symbol Index:: Index of C preprocessor symbols defined.
* Macro Index:: Index of Autoconf macros.
--- The Detailed Node Listing ---
@ -125,7 +125,8 @@ Specific Tests
General Purpose Macros
* Setup:: Controlling Autoconf operation.
* General Feature Tests:: Checking for kinds of features.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -226,7 +227,7 @@ 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_FUNC_CHECK} and
@code{AC_REPLACE_FUNCS} test, indicating that certain functions are
stubs (@pxref{General Feature Tests}, for more information on checking for
stubs (@pxref{C Features}, for more information on checking for
functions).
@ifinfo
@ -285,7 +286,15 @@ containing @code{#define} directives (@pxref{Setup});
@item
a shell script called @file{config.status} that, when run, will recreate
the files listed above (@pxref{Invoking config.status}).
the files listed above (@pxref{Invoking config.status});
@item
a shell script called @file{config.cache} that saves the results of
running many of the tests;
@item
a file called @file{config.log} containing any messages produced by
compilers, to help debugging if @code{configure} makes a mistake.
@end itemize
To create a @code{configure} script with Autoconf, you need to write an
@ -308,6 +317,8 @@ configuration are produced. Programs that are executed are suffixed by
Files used in preparing a software package for distribution:
@example
@group
your source files --> [autoscan*] --> [configure.scan] --> configure.in
configure.in --. .------> autoconf* -----> configure
+---+
[aclocal.m4] --' `---.
@ -348,27 +359,28 @@ Autoconf macros that test the system features your package needs or can
use. Autoconf macros already exist to check for many features; see
@ref{Specific Tests}, for their descriptions. For most other
features, you can use Autoconf template macros to produce custom checks;
see @ref{General Feature Tests}, for information about them. For especially
see @ref{General Purpose Macros}, for information about them. For especially
tricky or specialized features, @file{configure.in} might need to
contain some hand-crafted shell commands. @xref{Writing Macros}, for
guidelines on writing tests from scratch.
Every @file{configure.in} must begin with a call to @code{AC_INIT} and
end with a call to @code{AC_OUTPUT} (@pxref{Setup}). Other than that,
the order in which @file{configure.in} calls the Autoconf macros is
generally not important, except that some macros rely on other macros
having been called first, because they check previously set values of
some variables to decide what to do. These macros are noted in the
individual descriptions (@pxref{Specific Tests}).
Other than that, the order in which @file{configure.in} calls the
Autoconf macros is generally not important, with a few exceptions.
Every @file{configure.in} must contain a call to @code{AC_INIT} before
the checks, and a call to @code{AC_OUTPUT} at the end (@pxref{Setup}).
Additionally, some macros rely on other macros having been called first,
because they check previously set values of some variables to decide
what to do. These macros are noted in the individual descriptions
(@pxref{Specific Tests}), and they also warn you if they are called out
of order.
To encourage consistency, here is a suggested order for calling the
Autoconf macros. A few macros need to be called in a different order
from the one given here; they are noted in their individual descriptions
(@pxref{Specific Tests}). Note that there must not be any space
between the macro name and the open parentheses.
Autoconf macros. Note that there must not be any space between a macro
name and the open parentheses.
@display
@group
macros that control Autoconf operation
@code{AC_INIT(@var{file})}
checks for alternative programs
checks for UNIX variants that set C preprocessor variables
@ -483,7 +495,7 @@ These macros test for particular operating system features that packages
might need or want to use. If you need to test for a feature that none
of these macros check for, you can probably do it by calling one of the
general purpose test macros with appropriate arguments (@pxref{General
Feature Tests}).
Purpose Macros}).
All of these macros that set @code{make} variables call @code{AC_SUBST}
on those variables (@pxref{Setting Variables}, for details about
@ -547,9 +559,9 @@ finds.
@defmac AC_PROG_CC
@maindex PROG_CC
If @code{gcc} is found, set @code{make} variable @code{CC} to @samp{gcc},
and set shell variable @code{GCC} to @samp{yes} for use by macros such as
@code{AC_GCC_TRADITIONAL}. Otherwise set @code{GCC} to be empty.
If @code{gcc} is found, set @code{make} variable @code{CC} to
@samp{gcc}, and set shell variable @code{GCC} to @samp{yes}. Otherwise
set @code{GCC} to be empty.
@end defmac
@defmac AC_PROG_CPP
@ -575,7 +587,7 @@ variable @code{CXX} to its value. Otherwise search for a C++ compiler
under likely names (@code{c++}, @code{g++}, @code{gcc}, and @code{CC}).
If none of those checks succeed, as a last resort set @code{CXX} to
@code{gcc}. Also set shell variable @code{GXX} to @samp{yes} if it
found the GNU C++ compiler, the empty string if not.
found the GNU C++ compiler, empty otherwise.
@end defmac
@defmac AC_PROG_CXXCPP
@ -598,8 +610,8 @@ this macro first if it hasn't been called already. This macro calls
Set @code{make} variable @code{INSTALL} to @samp{install -c} if
@code{install} is found and is compatible with the BSD and GNU versions.
Otherwise, set @code{INSTALL} to @samp{@var{dir}/install.sh -c}, where
it checks the directories specified to @code{AC_CONFIG_AUX} (or its
default directories) to determine @var{dir}.
it checks the directories specified to @code{AC_CONFIG_AUX_DIR} (or its
default directories) to determine @var{dir} (@pxref{Setup}).
This macro screens out the false matches @file{/etc/install},
@file{/usr/sbin/install}, and other instances of @code{install} known
@ -973,7 +985,9 @@ rather than choke on it.
#ifdef _AIX
#pragma alloca
#else /* not _AIX */
#ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#endif /* not defined(alloca) */
#endif /* not _AIX */
#endif /* not HAVE_ALLOCA_H */
#endif /* not __GNUC__ */
@ -1185,8 +1199,8 @@ were an array of values.
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 1. This information can be used by
@code{AC_TEST_PROGRAM} to determine whether to take a default action
instead of trying to run a test program (@pxref{General Feature Tests}).
@code{AC_TEST_RUN} to determine whether to take a default action
instead of trying to run a test program (@pxref{C Features}).
@end defmac
@defmac AC_CHAR_UNSIGNED
@ -1224,7 +1238,7 @@ define @code{inline} to be @code{__inline}. This macro calls
@vindex INT_16_BITS
If the C type @code{int} is 16 bits wide, define @code{INT_16_BITS}.
This macro is obsolete; it is more general to use
@samp{AC_SIZEOF_TYPE(int)} instead (@pxref{General Feature Tests}).
@samp{AC_SIZEOF_TYPE(int)} instead (@pxref{C Features}).
@end defmac
@defmac AC_LONG_64_BITS
@ -1232,7 +1246,7 @@ This macro is obsolete; it is more general to use
@vindex LONG_64_BITS
If the C type @code{long int} is 64 bits wide, define
@code{LONG_64_BITS}. This macro is obsolete; it is more general to use
@samp{AC_SIZEOF_TYPE(long)} instead (@pxref{General Feature Tests}).
@samp{AC_SIZEOF_TYPE(long)} instead (@pxref{C Features}).
@end defmac
@defmac AC_LONG_DOUBLE
@ -1395,16 +1409,35 @@ that Autoconf produces or to check whether various kinds of features are
available. They all take arguments. When calling these macros, there
must not be any blank space between the macro name and the open
parentheses.
Arguments to these macros can be more than one line long if they are
enclosed within the @code{m4} quote characters @samp{[} and @samp{]}.
Many of these macros handle two
cases: what to do if the given condition is met, and what to do if the
condition is not met. In some places you you might want to do something
if a condition is true but do nothing if it's false, or vice versa. To
omit the true case, pass an empty value for the @var{action-if-found}
argument to the macro. To omit the false case, omit the
@var{action-if-not-found} argument to the macro, including the comma
before it.
One shell programming construction that you should not use in the action
arguments to these macros is
@samp{@var{var}=$@{@var{var}:-@var{value}@}}. Old BSD shells, including
the Ultrix @code{sh}, don't understand the colon, and complain and die.
If you omit the colon, it works fine:
@samp{@var{var}=$@{@var{var}-@var{value}@}}. Using the form without the
colon has one small disadvantage. Users can not select a default value
by giving a variable an empty value, e.g., @samp{CC= configure}.
Instead, they must unset the variable, e.g., @samp{unset CC; configure}.
Within each section below, the macros are listed in alphabetical order.
These macros are defined in the file @file{acgeneral.m4}.
@menu
* Setup:: Controlling Autoconf operation.
* General Feature Tests:: Checking for kinds of features.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -1412,21 +1445,36 @@ These macros are defined in the file @file{acgeneral.m4}.
* Macro Ordering:: Enforcing ordering constraints.
@end menu
@node Setup, General Feature Tests, , General Purpose Macros
@node Setup, File Existence, , General Purpose Macros
@section Controlling Autoconf Setup
The following macros control the kind of output that Autoconf produces.
@file{configure.in} should call them before @code{AC_INIT} or
@code{AC_PREPARE}. Remember to put a @code{dnl} comment at the ends of
the lines containing their calls, to avoid inserting blank lines at the
beginning of @file{configure}.
@defmac AC_CONFIG_AUX_DIR(@var{dir})
@maindex CONFIG_AUX_DIR
Use the @file{install.sh}, @file{config.sub}, @file{config.guess}, and
Cygnus @file{configure} scripts that are in directory @var{dir}. These
are auxiliary files used in configuration. @var{dir} can be either
absolute or relative to @file{@var{srcdir}}. The default is
@file{@var{srcdir}} or @file{@var{srcdir}/..} or
@file{@var{srcdir}/../..}, whichever is the first that contains
@file{install.sh}. The other files are not checked for, so that using
@code{AC_PROG_INSTALL} does not automatically require distributing the
other auxiliary files.
@end defmac
@defmac AC_CONFIG_HEADER (@var{header-to-create} @dots{})
@maindex CONFIG_HEADER
@vindex HAVE_CONFIG_H
Make @code{AC_OUTPUT} create the file(s) in the
whitespace-separated list @var{header-to-create} containing C
preprocessor @code{#define} statements and replace @samp{@@DEFS@@} in
generated files with @samp{-DHAVE_CONFIG_H} instead of the value of
@code{DEFS}.
This macro should be called right after @code{AC_INIT}. The usual name
for @var{header-to-create} is @file{config.h}.
Make @code{AC_OUTPUT} create the file(s) in the whitespace-separated
list @var{header-to-create} containing C preprocessor @code{#define}
statements and replace @samp{@@DEFS@@} in generated files with
@samp{-DHAVE_CONFIG_H} instead of the value of @code{DEFS}. The usual
name for @var{header-to-create} is @file{config.h}.
If @var{header-to-create} already exists and its contents are identical
to what @code{AC_OUTPUT} would put in it, it is left alone. Doing this
@ -1444,6 +1492,20 @@ You can use the program @code{autoheader} to create
@file{@var{header-to-create}.in} (@pxref{Invoking autoheader}).
@end defmac
@defmac AC_CONFIG_SUBDIRS (@var{dir} @dots{})
@maindex CONFIG_SUBDIRS
Run @code{configure} in each subdirectory @var{dir} in the given
whitespace-separated list If a given @var{dir} is not found, no error is
reported, so a @code{configure} script can configure whichever parts of
a large source tree are present. If a given @var{dir} contains
@file{configure.in} but no @file{configure}, the Cygnus @code{configure}
script found by @code{AC_CONFIG_AUXDIR} is used.
The subdirectory @code{configure} scripts are given the same command
line options that were given to this @code{configure} script, with minor
changes if needed (e.g., to adjust a relative path for the cache file).
@end defmac
@defmac AC_INIT (@var{unique-file-in-source-dir})
@maindex INIT
Process the command-line arguments and find the source code directory.
@ -1471,6 +1533,18 @@ 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_PROGRAM (@var{program})
@maindex PREFIX_PROGRAM
If the user did not specify an installation prefix (using the
@samp{--prefix} option), guess a value for it by looking for
@var{program} in @code{PATH}, the way the shell does. If @var{program}
is found, set the prefix to the parent of the directory containing
@var{program}; otherwise leave the prefix specified in
@file{Makefile.in} unchanged. For example, if @var{program} is
@code{gcc} and the @code{PATH} contains @file{/usr/local/gnu/bin/gcc},
set the prefix to @file{/usr/local/gnu}.
@end defmac
@defmac AC_PREPARE (@var{unique-file-in-source-dir})
@maindex PREPARE
Find the source code directory and set up shell variables necessary for
@ -1528,42 +1602,74 @@ produces this in @file{configure}:
@end example
@end defmac
@node General Feature Tests, Command Line, Setup, General Purpose Macros
@section Checking for Kinds of Features
@node File Existence, C Features, Setup, General Purpose Macros
@section Checking Whether Particular Files Exist
These macros are templates that, when called with actual parameters,
check for various kinds of features. Many of these macros handle two
cases: what to do if the given condition is met, and what to do if the
condition is not met. In some places you you might want to do something
if a condition is true but do nothing if it's false, or vice versa. To
omit the true case, pass an empty value for the @var{action-if-found}
argument to the macro. To omit the false case, omit the
@var{action-if-not-found} argument to the macro, including the comma
before it.
These macros check whether particular files exist.
One shell programming construction that you should not use in the action
arguments to these macros is
@samp{@var{var}=$@{@var{var}:-@var{value}@}}. Old BSD shells, including
the Ultrix @code{sh}, don't understand the colon, and complain and die.
If you omit the colon, it works fine:
@samp{@var{var}=$@{@var{var}-@var{value}@}}. Using the form without the
colon has one small disadvantage. Users can not select a default value
by giving a variable an empty value, e.g., @samp{CC= configure}.
Instead, they must unset the variable, e.g., @samp{unset CC; configure}.
@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]]})
@maindex HAVE_LIBRARY
Create a test C program to see whether that program can be linked with
the specified library. @var{action-if-found} is a list of shell
commands to run if the link succeeds (which means that the library is
present); @var{action-if-not-found} is a list of shell commands to run
if the link fails. If @var{action-if-found} and
@var{action-if-not-found} are not specified, the default action is to
add @samp{-lfoo} to @code{LIBS} and define @samp{HAVE_LIBfoo}
for library @samp{foo}. @var{library} can be written as any of
@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
the compiler is passed @samp{-lfoo}.
@end defmac
@xref{Writing Macros}, for more information on how best to use these
macros.
@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_PROGRAM_CHECK (@var{variable}, @var{prog-to-check-for}, @var{value-if-found} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_CHECK
Check whether program @var{prog-to-check-for} exists in @code{PATH}. If
it is found, set @var{variable} to @var{value-if-found}, otherwise 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_PROGRAM_PATH (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_PATH
Similar to @code{AC_PROGRAM_CHECK}, 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_PROGRAMS_CHECK (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_CHECK
Check for each program in the whitespace-separated list
@var{progs-to-check-for} exists in @code{PATH}. If it is found, set
@var{variable} to the name of that program. Otherwise, continue
checking the next program in the list. If none of the programs in the
list are found, set @var{variable} to @var{value-if-not-found}; if
@var{value-if-not-found} is not specified, the value of @var{variable}
is not changed. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PROGRAMS_PATH (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_PATH
Like @code{AC_PROGRAMS_CHECK}, but if any of @var{progs-to-check-for}
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
These macros check for features of the C compiler, libraries, and headers.
@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
Print @samp{checking for @var{echo-text}} to the standard output
(using @code{AC_CHECKING}, @pxref{Printing Messages}).
Create a test C program to see whether a function whose body consists of
@var{function-body} can be compiled and linked; @var{includes} is any
@code{#include} statements needed by the code in @var{function-body}.
If the file compiles and links successfully, run shell commands
@var{action-if-found}, otherwise run @var{action-if-not-found}.
This is an obsolete alias for @code{AC_TEST_LINK}, with the addition that it
prints @samp{checking for @var{echo-text}} to the standard output first.
@end defmac
@defmac AC_FUNC_CHECK (@var{function}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@ -1595,20 +1701,6 @@ list that exists, define @code{HAVE_@var{header-file}} (in all caps).
it is used here.
@end defmac
@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]]})
@maindex HAVE_LIBRARY
Create a test C program to see whether that program can be linked with
the specified library. @var{action-if-found} is a list of shell
commands to run if the link succeeds (which means that the library is
present); @var{action-if-not-found} is a list of shell commands to run
if the link fails. If @var{action-if-found} and
@var{action-if-not-found} are not specified, the default action is to
add @samp{-lfoo} to @code{LIBS} and define @samp{HAVE_LIBfoo}
for library @samp{foo}. @var{library} can be written as any of
@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
the compiler is passed @samp{-lfoo}.
@end defmac
@defmac AC_HEADER_CHECK (@var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex HEADER_CHECK
If @var{header-file} exists, execute shell commands
@ -1634,14 +1726,6 @@ almost always detect them by simply using @code{#ifdef} directives in
your programs.
@end defmac
@defmac AC_PROGRAM_CHECK (@var{variable}, @var{prog-to-check-for}, @var{value-if-found} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_CHECK
Check whether program @var{prog-to-check-for} exists in @code{PATH}. If
it is found, set @var{variable} to @var{value-if-found}, otherwise 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_PROGRAM_EGREP (@var{pattern}, @var{program}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex PROGRAM_EGREP
@var{program} is the text of a C or C++ program, on which shell variable and
@ -1657,32 +1741,6 @@ on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_PROGRAM_PATH (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_PATH
Similar to @code{AC_PROGRAM_CHECK}, 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_PROGRAMS_CHECK (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_CHECK
Check for each program in the whitespace-separated list
@var{progs-to-check-for} exists in @code{PATH}. If it is found, set
@var{variable} to the name of that program. Otherwise, continue
checking the next program in the list. If none of the programs in the
list are found, set @var{variable} to @var{value-if-not-found}; if
@var{value-if-not-found} is not specified, the value of @var{variable}
is not changed. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PROGRAMS_PATH (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_PATH
Like @code{AC_PROGRAMS_CHECK}, but if any of @var{progs-to-check-for}
are found, set @var{variable} to the entire pathname of the program
found.
@end defmac
@defmac AC_REPLACE_FUNCS (@var{function-name}@dots{})
@maindex REPLACE_FUNCS
For each given @var{function-name} in the whitespace-separated argument
@ -1720,8 +1778,22 @@ on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_TEST_LINK (@var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex TEST_LINK
Create a test C program to see whether a function whose body consists of
@var{function-body} can be compiled and linked; @var{includes} is any
@code{#include} statements needed by the code in @var{function-body}.
If the file compiles and links successfully, run shell commands
@var{action-if-found}, otherwise run @var{action-if-not-found}.
@end defmac
@defmac AC_TEST_PROGRAM (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
@maindex TEST_PROGRAM
This is an obsolete alias for @code{AC_TEST_RUN}.
@end defmac
@defmac AC_TEST_RUN (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
@maindex TEST_RUN
@var{program} is the text of a C program, on which shell variable and
backquote substitutions are performed. If it compiles and links
successfully and returns an exit status of 0 when executed, run shell
@ -1736,28 +1808,35 @@ run. If that argument is given, this macro calls @code{AC_CROSS_CHECK}
if it has not already been called (@pxref{Compiler Characteristics}).
@end defmac
@node Command Line, Setting Variables, General Feature Tests, General Purpose Macros
@node Command Line, Setting Variables, C Features, General Purpose Macros
@section Checking Command Line Arguments
These macros check whether the user gave @code{configure} various
command line arguments. Like the general feature tests (@pxref{General
Feature Tests}), they may take an argument to use if the argument was
Purpose Macros}), they may take an argument to use if the argument was
given and one for if it was not given.
@defmac AC_ENABLE (@var{feature}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ENABLE
@defmac AC_ARG_ENABLE (@var{feature}, @var{help-string}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ARG_ENABLE
If the user gave @code{configure} the option
@samp{--enable-@var{feature}} or @samp{--disable-@var{feature}}, run
shell commands @var{action-if-true}. Otherwise run shell commands
@var{action-if-false}. The name @var{feature} should consist only of
alphanumeric characters and dashes.
@var{action-if-false}. @var{help-string} is a description of
the option which looks like this:
@example
--enable-readline support fancy command line editing
@end example
@noindent
@var{help-string} may be more than one line long, if more detail is
needed. Just make sure the columns line up in @samp{configure --help}.
The @var{feature} indicates an optional user-level facility. This
option allows users to choose which optional features to build and
install. @samp{--enable-@var{feature}} options should never make a
feature behave differently or cause one feature to replace another.
They should only cause parts of the program to be built rather than left
out.
The name @var{feature} should consist only of alphanumeric characters
and dashes. The @var{feature} indicates an optional user-level
facility. This option allows users to choose which optional features to
build and install. @samp{--enable-@var{feature}} options should never
make a feature behave differently or cause one feature to replace
another. They should only cause parts of the program to be built rather
than left out.
The user can give an argument by following the feature name with
@samp{=} and the argument. Giving an argument of @samp{no} indicates
@ -1770,34 +1849,28 @@ the shell variable @code{enableval}. If no argument was given to
@samp{--disable-@var{feature}} is equivalent to
@samp{--enable-@var{feature}=no}. At present, arguments containing blanks
are not handled correctly; if you need an argument to contain a list,
require the items to be separated by commas instead. (This restriction
might disappear in the future.)
require the items to be separated by commas instead.
@end defmac
@defmac AC_PREFIX (@var{program})
@maindex PREFIX
If the user did not specify an installation prefix (using the
@samp{--prefix} option), guess a value for it by looking for
@var{program} in @code{PATH}, the way the shell does. If @var{program}
is found, set the prefix to the parent of the directory containing
@var{program}; otherwise leave the prefix specified in
@file{Makefile.in} unchanged. For example, if @var{program} is
@code{gcc} and the @code{PATH} contains @file{/usr/local/gnu/bin/gcc},
set the prefix to @file{/usr/local/gnu}.
@end defmac
@defmac AC_WITH (@var{package}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex WITH
@defmac AC_ARG_WITH (@var{package}, @var{help-string}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ARG_WITH
If the user gave @code{configure} the option @samp{--with-@var{package}}
or @samp{--without-@var{package}}, run shell commands
@var{action-if-true}. Otherwise run shell commands
@var{action-if-false}. The name @var{package} should consist only of
alphanumeric characters and dashes.
@var{action-if-false}. @var{help-string} is a description of
the option which looks like this:
@example
--with-gnu-as use the GNU assembler
@end example
@noindent
@var{help-string} may be more than one line long, if more detail is
needed. Just make sure the columns line up in @samp{configure --help}.
The @var{package} indicates another software package that this program
should work with. For example, @samp{--with-gnu-ld} means work with the
GNU linker instead of some other linker. @samp{--with-x11} means work
with X11.
The name @var{package} should consist only of alphanumeric characters
and dashes. The @var{package} indicates another software package that
this program should work with. For example, @samp{--with-gnu-ld} means
work with the GNU linker instead of some other linker.
@samp{--with-x11} means work with X11.
The user can give an argument by following the package name with
@samp{=} and the argument. Giving an argument of @samp{no} is for
@ -1813,8 +1886,19 @@ the shell variable @code{withval}. If no argument was given to
@samp{--without-@var{package}} is equivalent to
@samp{--with-@var{package}=no}. At present, arguments containing blanks
are not handled correctly; if you need an argument to contain a list,
require the items to be separated by commas instead. (This restriction
might disappear in the future.)
require the items to be separated by commas instead.
@end defmac
@defmac AC_ENABLE (@var{feature}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ENABLE
This is an obsolete version of @code{AC_ARG_ENABLE} that does not
provide a help string.
@end defmac
@defmac AC_WITH (@var{package}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex WITH
This is an obsolete version of @code{AC_ARG_WITH} that does not
provide a help string.
@end defmac
@node Setting Variables, Printing Messages, Command Line, General Purpose Macros
@ -1923,6 +2007,17 @@ LIBS="$LIBS -ltermcap"
@end example
@end defmac
@ignore
@defmac AC_SUBST_FILE (@var{variable}, @var{file})
@maindex SUBST_FILE
Substitute the contents of the file @file{@var{srcdir}/@var{file}} into
@file{Makefile} variable @var{variable} when creating the output files
(typically one or more @file{Makefile}s). This macro is useful for
inserting @file{Makefile} fragments for particular host or tartet types
into @file{Makefile}s.
@end defmac
@end ignore
@node Printing Messages, Language Choice, Setting Variables, General Purpose Macros
@section Printing Messages
@ -2272,19 +2367,19 @@ come later should contain a call to @code{AC_PROVIDE}.
For example, @code{AC_AIX} contains
@example
AC_BEFORE([$0], [AC_COMPILE_CHECK])
AC_BEFORE([$0], [AC_TEST_LINK])
@end example
@noindent
and @code{AC_COMPILE_CHECK} contains
and @code{AC_TEST_LINK} contains
@example
AC_PROVIDE([$0])
@end example
@noindent
As a result, if @code{AC_AIX} is called after @code{AC_COMPILE_CHECK},
it will note that @code{AC_COMPILE_CHECK} has already been called and
As a result, if @code{AC_AIX} is called after @code{AC_TEST_LINK},
it will note that @code{AC_TEST_LINK} has already been called and
print a warning message.
@node Checking for Files, Checking for Symbols, Dependencies Between Macros, Writing Macros
@ -2308,7 +2403,7 @@ 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_HEADER_EGREP} if the symbol is not a C preprocessor
macro (@pxref{General Feature Tests}), or compile a small test program that includes
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
@ -2355,16 +2450,16 @@ 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_COMPILE_CHECK} (@pxref{General Feature Tests}). You have to write a
@code{AC_TEST_LINK} (@pxref{C Features}). You have to write a
test program by hand. You can compile and run it using
@code{AC_TEST_PROGRAM} (@pxref{General Feature Tests}).
@code{AC_TEST_RUN} (@pxref{C Features}).
Try to avoid writing test programs if possible, because using them
prevents people from configuring your package for cross-compiling. If
it's really best that you test for a run-time behavior, try to provide a
default ``worst case'' value to use when cross-compiling makes run-time
tests impossible. You do this by passing the optional last argument to
@code{AC_TEST_PROGRAM}.
@code{AC_TEST_RUN}.
@menu
* Guidelines:: General rules for writing test programs.
@ -2526,7 +2621,7 @@ redundant.
@defvar LIBOBJS
Names of object files (ending in @file{.o}). Set by
@code{AC_REPLACE_FUNCS} (@pxref{General Feature Tests}).
@code{AC_REPLACE_FUNCS} (@pxref{C Features}).
@end defvar
@node VPATH Substitutions, Automatic Remaking, Predefined Variables, Makefiles
@ -2791,7 +2886,14 @@ The shell with which to run @code{configure} for the @samp{--recheck}
option. The default is @file{/bin/sh}.
@end defvar
The following two variables provide one way for separately distributed
@defvar CONFIG_STATUS
The file name to use for the shell script that records the
configuration. The default is @file{./config.status}. This variable is
useful when one package uses parts of another and the @file{configure}
scripts shouldn't be merged because they are maintained separately.
@end defvar
The following variables provide one way for separately distributed
packages to share the values computed by @code{configure}. Doing so can
be useful if some of the packages need a superset of the features that
one of them, perhaps a common library, does. These variables allow a

2
doc/Makefile.in
View File

@ -156,7 +156,7 @@ clean:
mostlyclean: clean
distclean: clean
rm -f Makefile config.status config.cache
rm -f Makefile config.status config.cache config.log
realclean: distclean
rm -f TAGS *.info*

450
doc/autoconf.texi
View File

@ -6,9 +6,9 @@
@c @setchapternewpage odd
@c %**end of header
@set EDITION 1.91
@set VERSION 1.91
@set UPDATED May 1994
@set EDITION 1.93
@set VERSION 1.93
@set UPDATED June 1994
@iftex
@finalout
@ -91,17 +91,17 @@ package. This is edition @value{EDITION}, for Autoconf version @value{VERSION}.
@c The master menu, created with texinfo-master-menu, goes here.
@menu
* Introduction:: Autoconf's purpose, strengths, and weaknesses.
* Distributing:: Legal restrictions on Autoconf output.
* Making configure Scripts:: How to organize and produce Autoconf scripts.
* Specific Tests:: Macros that check for particular features.
* General Purpose Macros:: Macros that check for kinds of features.
* Writing Macros:: How to add your own macros to Autoconf.
* Makefiles:: Information Autoconf uses in @file{Makefile}s.
* Invoking configure:: How to use the Autoconf output.
* Example:: Sample Autoconf input files.
* Preprocessor Symbol Index:: Index of C preprocessor symbols defined.
* Macro Index:: Index of Autoconf macros.
* Introduction:: Autoconf's purpose, strengths, and weaknesses.
* Distributing:: Legal restrictions on Autoconf output.
* Making configure Scripts:: How to organize and produce Autoconf scripts.
* Specific Tests:: Macros that check for particular features.
* General Purpose Macros:: Macros that check for kinds of features.
* Writing Macros:: How to add your own macros to Autoconf.
* Makefiles:: Information Autoconf uses in @file{Makefile}s.
* Invoking configure:: How to use the Autoconf output.
* Example:: Sample Autoconf input files.
* Preprocessor Symbol Index:: Index of C preprocessor symbols defined.
* Macro Index:: Index of Autoconf macros.
--- The Detailed Node Listing ---
@ -125,7 +125,8 @@ Specific Tests
General Purpose Macros
* Setup:: Controlling Autoconf operation.
* General Feature Tests:: Checking for kinds of features.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -226,7 +227,7 @@ 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_FUNC_CHECK} and
@code{AC_REPLACE_FUNCS} test, indicating that certain functions are
stubs (@pxref{General Feature Tests}, for more information on checking for
stubs (@pxref{C Features}, for more information on checking for
functions).
@ifinfo
@ -285,7 +286,15 @@ containing @code{#define} directives (@pxref{Setup});
@item
a shell script called @file{config.status} that, when run, will recreate
the files listed above (@pxref{Invoking config.status}).
the files listed above (@pxref{Invoking config.status});
@item
a shell script called @file{config.cache} that saves the results of
running many of the tests;
@item
a file called @file{config.log} containing any messages produced by
compilers, to help debugging if @code{configure} makes a mistake.
@end itemize
To create a @code{configure} script with Autoconf, you need to write an
@ -308,6 +317,8 @@ configuration are produced. Programs that are executed are suffixed by
Files used in preparing a software package for distribution:
@example
@group
your source files --> [autoscan*] --> [configure.scan] --> configure.in
configure.in --. .------> autoconf* -----> configure
+---+
[aclocal.m4] --' `---.
@ -348,27 +359,28 @@ Autoconf macros that test the system features your package needs or can
use. Autoconf macros already exist to check for many features; see
@ref{Specific Tests}, for their descriptions. For most other
features, you can use Autoconf template macros to produce custom checks;
see @ref{General Feature Tests}, for information about them. For especially
see @ref{General Purpose Macros}, for information about them. For especially
tricky or specialized features, @file{configure.in} might need to
contain some hand-crafted shell commands. @xref{Writing Macros}, for
guidelines on writing tests from scratch.
Every @file{configure.in} must begin with a call to @code{AC_INIT} and
end with a call to @code{AC_OUTPUT} (@pxref{Setup}). Other than that,
the order in which @file{configure.in} calls the Autoconf macros is
generally not important, except that some macros rely on other macros
having been called first, because they check previously set values of
some variables to decide what to do. These macros are noted in the
individual descriptions (@pxref{Specific Tests}).
Other than that, the order in which @file{configure.in} calls the
Autoconf macros is generally not important, with a few exceptions.
Every @file{configure.in} must contain a call to @code{AC_INIT} before
the checks, and a call to @code{AC_OUTPUT} at the end (@pxref{Setup}).
Additionally, some macros rely on other macros having been called first,
because they check previously set values of some variables to decide
what to do. These macros are noted in the individual descriptions
(@pxref{Specific Tests}), and they also warn you if they are called out
of order.
To encourage consistency, here is a suggested order for calling the
Autoconf macros. A few macros need to be called in a different order
from the one given here; they are noted in their individual descriptions
(@pxref{Specific Tests}). Note that there must not be any space
between the macro name and the open parentheses.
Autoconf macros. Note that there must not be any space between a macro
name and the open parentheses.
@display
@group
macros that control Autoconf operation
@code{AC_INIT(@var{file})}
checks for alternative programs
checks for UNIX variants that set C preprocessor variables
@ -483,7 +495,7 @@ These macros test for particular operating system features that packages
might need or want to use. If you need to test for a feature that none
of these macros check for, you can probably do it by calling one of the
general purpose test macros with appropriate arguments (@pxref{General
Feature Tests}).
Purpose Macros}).
All of these macros that set @code{make} variables call @code{AC_SUBST}
on those variables (@pxref{Setting Variables}, for details about
@ -547,9 +559,9 @@ finds.
@defmac AC_PROG_CC
@maindex PROG_CC
If @code{gcc} is found, set @code{make} variable @code{CC} to @samp{gcc},
and set shell variable @code{GCC} to @samp{yes} for use by macros such as
@code{AC_GCC_TRADITIONAL}. Otherwise set @code{GCC} to be empty.
If @code{gcc} is found, set @code{make} variable @code{CC} to
@samp{gcc}, and set shell variable @code{GCC} to @samp{yes}. Otherwise
set @code{GCC} to be empty.
@end defmac
@defmac AC_PROG_CPP
@ -575,7 +587,7 @@ variable @code{CXX} to its value. Otherwise search for a C++ compiler
under likely names (@code{c++}, @code{g++}, @code{gcc}, and @code{CC}).
If none of those checks succeed, as a last resort set @code{CXX} to
@code{gcc}. Also set shell variable @code{GXX} to @samp{yes} if it
found the GNU C++ compiler, the empty string if not.
found the GNU C++ compiler, empty otherwise.
@end defmac
@defmac AC_PROG_CXXCPP
@ -598,8 +610,8 @@ this macro first if it hasn't been called already. This macro calls
Set @code{make} variable @code{INSTALL} to @samp{install -c} if
@code{install} is found and is compatible with the BSD and GNU versions.
Otherwise, set @code{INSTALL} to @samp{@var{dir}/install.sh -c}, where
it checks the directories specified to @code{AC_CONFIG_AUX} (or its
default directories) to determine @var{dir}.
it checks the directories specified to @code{AC_CONFIG_AUX_DIR} (or its
default directories) to determine @var{dir} (@pxref{Setup}).
This macro screens out the false matches @file{/etc/install},
@file{/usr/sbin/install}, and other instances of @code{install} known
@ -973,7 +985,9 @@ rather than choke on it.
#ifdef _AIX
#pragma alloca
#else /* not _AIX */
#ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#endif /* not defined(alloca) */
#endif /* not _AIX */
#endif /* not HAVE_ALLOCA_H */
#endif /* not __GNUC__ */
@ -1185,8 +1199,8 @@ were an array of values.
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 1. This information can be used by
@code{AC_TEST_PROGRAM} to determine whether to take a default action
instead of trying to run a test program (@pxref{General Feature Tests}).
@code{AC_TEST_RUN} to determine whether to take a default action
instead of trying to run a test program (@pxref{C Features}).
@end defmac
@defmac AC_CHAR_UNSIGNED
@ -1224,7 +1238,7 @@ define @code{inline} to be @code{__inline}. This macro calls
@vindex INT_16_BITS
If the C type @code{int} is 16 bits wide, define @code{INT_16_BITS}.
This macro is obsolete; it is more general to use
@samp{AC_SIZEOF_TYPE(int)} instead (@pxref{General Feature Tests}).
@samp{AC_SIZEOF_TYPE(int)} instead (@pxref{C Features}).
@end defmac
@defmac AC_LONG_64_BITS
@ -1232,7 +1246,7 @@ This macro is obsolete; it is more general to use
@vindex LONG_64_BITS
If the C type @code{long int} is 64 bits wide, define
@code{LONG_64_BITS}. This macro is obsolete; it is more general to use
@samp{AC_SIZEOF_TYPE(long)} instead (@pxref{General Feature Tests}).
@samp{AC_SIZEOF_TYPE(long)} instead (@pxref{C Features}).
@end defmac
@defmac AC_LONG_DOUBLE
@ -1395,16 +1409,35 @@ that Autoconf produces or to check whether various kinds of features are
available. They all take arguments. When calling these macros, there
must not be any blank space between the macro name and the open
parentheses.
Arguments to these macros can be more than one line long if they are
enclosed within the @code{m4} quote characters @samp{[} and @samp{]}.
Many of these macros handle two
cases: what to do if the given condition is met, and what to do if the
condition is not met. In some places you you might want to do something
if a condition is true but do nothing if it's false, or vice versa. To
omit the true case, pass an empty value for the @var{action-if-found}
argument to the macro. To omit the false case, omit the
@var{action-if-not-found} argument to the macro, including the comma
before it.
One shell programming construction that you should not use in the action
arguments to these macros is
@samp{@var{var}=$@{@var{var}:-@var{value}@}}. Old BSD shells, including
the Ultrix @code{sh}, don't understand the colon, and complain and die.
If you omit the colon, it works fine:
@samp{@var{var}=$@{@var{var}-@var{value}@}}. Using the form without the
colon has one small disadvantage. Users can not select a default value
by giving a variable an empty value, e.g., @samp{CC= configure}.
Instead, they must unset the variable, e.g., @samp{unset CC; configure}.
Within each section below, the macros are listed in alphabetical order.
These macros are defined in the file @file{acgeneral.m4}.
@menu
* Setup:: Controlling Autoconf operation.
* General Feature Tests:: Checking for kinds of features.
* File Existence:: Checking whether particular files exist.
* C Features:: Checking for features of the C system.
* Command Line:: Checking command line arguments.
* Setting Variables:: Setting shell and @code{make} variables.
* Printing Messages:: Notifying users of progress or problems.
@ -1412,21 +1445,36 @@ These macros are defined in the file @file{acgeneral.m4}.
* Macro Ordering:: Enforcing ordering constraints.
@end menu
@node Setup, General Feature Tests, , General Purpose Macros
@node Setup, File Existence, , General Purpose Macros
@section Controlling Autoconf Setup
The following macros control the kind of output that Autoconf produces.
@file{configure.in} should call them before @code{AC_INIT} or
@code{AC_PREPARE}. Remember to put a @code{dnl} comment at the ends of
the lines containing their calls, to avoid inserting blank lines at the
beginning of @file{configure}.
@defmac AC_CONFIG_AUX_DIR(@var{dir})
@maindex CONFIG_AUX_DIR
Use the @file{install.sh}, @file{config.sub}, @file{config.guess}, and
Cygnus @file{configure} scripts that are in directory @var{dir}. These
are auxiliary files used in configuration. @var{dir} can be either
absolute or relative to @file{@var{srcdir}}. The default is
@file{@var{srcdir}} or @file{@var{srcdir}/..} or
@file{@var{srcdir}/../..}, whichever is the first that contains
@file{install.sh}. The other files are not checked for, so that using
@code{AC_PROG_INSTALL} does not automatically require distributing the
other auxiliary files.
@end defmac
@defmac AC_CONFIG_HEADER (@var{header-to-create} @dots{})
@maindex CONFIG_HEADER
@vindex HAVE_CONFIG_H
Make @code{AC_OUTPUT} create the file(s) in the
whitespace-separated list @var{header-to-create} containing C
preprocessor @code{#define} statements and replace @samp{@@DEFS@@} in
generated files with @samp{-DHAVE_CONFIG_H} instead of the value of
@code{DEFS}.
This macro should be called right after @code{AC_INIT}. The usual name
for @var{header-to-create} is @file{config.h}.
Make @code{AC_OUTPUT} create the file(s) in the whitespace-separated
list @var{header-to-create} containing C preprocessor @code{#define}
statements and replace @samp{@@DEFS@@} in generated files with
@samp{-DHAVE_CONFIG_H} instead of the value of @code{DEFS}. The usual
name for @var{header-to-create} is @file{config.h}.
If @var{header-to-create} already exists and its contents are identical
to what @code{AC_OUTPUT} would put in it, it is left alone. Doing this
@ -1444,6 +1492,20 @@ You can use the program @code{autoheader} to create
@file{@var{header-to-create}.in} (@pxref{Invoking autoheader}).
@end defmac
@defmac AC_CONFIG_SUBDIRS (@var{dir} @dots{})
@maindex CONFIG_SUBDIRS
Run @code{configure} in each subdirectory @var{dir} in the given
whitespace-separated list If a given @var{dir} is not found, no error is
reported, so a @code{configure} script can configure whichever parts of
a large source tree are present. If a given @var{dir} contains
@file{configure.in} but no @file{configure}, the Cygnus @code{configure}
script found by @code{AC_CONFIG_AUXDIR} is used.
The subdirectory @code{configure} scripts are given the same command
line options that were given to this @code{configure} script, with minor
changes if needed (e.g., to adjust a relative path for the cache file).
@end defmac
@defmac AC_INIT (@var{unique-file-in-source-dir})
@maindex INIT
Process the command-line arguments and find the source code directory.
@ -1471,6 +1533,18 @@ 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_PROGRAM (@var{program})
@maindex PREFIX_PROGRAM
If the user did not specify an installation prefix (using the
@samp{--prefix} option), guess a value for it by looking for
@var{program} in @code{PATH}, the way the shell does. If @var{program}
is found, set the prefix to the parent of the directory containing
@var{program}; otherwise leave the prefix specified in
@file{Makefile.in} unchanged. For example, if @var{program} is
@code{gcc} and the @code{PATH} contains @file{/usr/local/gnu/bin/gcc},
set the prefix to @file{/usr/local/gnu}.
@end defmac
@defmac AC_PREPARE (@var{unique-file-in-source-dir})
@maindex PREPARE
Find the source code directory and set up shell variables necessary for
@ -1528,42 +1602,74 @@ produces this in @file{configure}:
@end example
@end defmac
@node General Feature Tests, Command Line, Setup, General Purpose Macros
@section Checking for Kinds of Features
@node File Existence, C Features, Setup, General Purpose Macros
@section Checking Whether Particular Files Exist
These macros are templates that, when called with actual parameters,
check for various kinds of features. Many of these macros handle two
cases: what to do if the given condition is met, and what to do if the
condition is not met. In some places you you might want to do something
if a condition is true but do nothing if it's false, or vice versa. To
omit the true case, pass an empty value for the @var{action-if-found}
argument to the macro. To omit the false case, omit the
@var{action-if-not-found} argument to the macro, including the comma
before it.
These macros check whether particular files exist.
One shell programming construction that you should not use in the action
arguments to these macros is
@samp{@var{var}=$@{@var{var}:-@var{value}@}}. Old BSD shells, including
the Ultrix @code{sh}, don't understand the colon, and complain and die.
If you omit the colon, it works fine:
@samp{@var{var}=$@{@var{var}-@var{value}@}}. Using the form without the
colon has one small disadvantage. Users can not select a default value
by giving a variable an empty value, e.g., @samp{CC= configure}.
Instead, they must unset the variable, e.g., @samp{unset CC; configure}.
@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]]})
@maindex HAVE_LIBRARY
Create a test C program to see whether that program can be linked with
the specified library. @var{action-if-found} is a list of shell
commands to run if the link succeeds (which means that the library is
present); @var{action-if-not-found} is a list of shell commands to run
if the link fails. If @var{action-if-found} and
@var{action-if-not-found} are not specified, the default action is to
add @samp{-lfoo} to @code{LIBS} and define @samp{HAVE_LIBfoo}
for library @samp{foo}. @var{library} can be written as any of
@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
the compiler is passed @samp{-lfoo}.
@end defmac
@xref{Writing Macros}, for more information on how best to use these
macros.
@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_PROGRAM_CHECK (@var{variable}, @var{prog-to-check-for}, @var{value-if-found} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_CHECK
Check whether program @var{prog-to-check-for} exists in @code{PATH}. If
it is found, set @var{variable} to @var{value-if-found}, otherwise 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_PROGRAM_PATH (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_PATH
Similar to @code{AC_PROGRAM_CHECK}, 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_PROGRAMS_CHECK (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_CHECK
Check for each program in the whitespace-separated list
@var{progs-to-check-for} exists in @code{PATH}. If it is found, set
@var{variable} to the name of that program. Otherwise, continue
checking the next program in the list. If none of the programs in the
list are found, set @var{variable} to @var{value-if-not-found}; if
@var{value-if-not-found} is not specified, the value of @var{variable}
is not changed. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PROGRAMS_PATH (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_PATH
Like @code{AC_PROGRAMS_CHECK}, but if any of @var{progs-to-check-for}
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
These macros check for features of the C compiler, libraries, and headers.
@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
Print @samp{checking for @var{echo-text}} to the standard output
(using @code{AC_CHECKING}, @pxref{Printing Messages}).
Create a test C program to see whether a function whose body consists of
@var{function-body} can be compiled and linked; @var{includes} is any
@code{#include} statements needed by the code in @var{function-body}.
If the file compiles and links successfully, run shell commands
@var{action-if-found}, otherwise run @var{action-if-not-found}.
This is an obsolete alias for @code{AC_TEST_LINK}, with the addition that it
prints @samp{checking for @var{echo-text}} to the standard output first.
@end defmac
@defmac AC_FUNC_CHECK (@var{function}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@ -1595,20 +1701,6 @@ list that exists, define @code{HAVE_@var{header-file}} (in all caps).
it is used here.
@end defmac
@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]]})
@maindex HAVE_LIBRARY
Create a test C program to see whether that program can be linked with
the specified library. @var{action-if-found} is a list of shell
commands to run if the link succeeds (which means that the library is
present); @var{action-if-not-found} is a list of shell commands to run
if the link fails. If @var{action-if-found} and
@var{action-if-not-found} are not specified, the default action is to
add @samp{-lfoo} to @code{LIBS} and define @samp{HAVE_LIBfoo}
for library @samp{foo}. @var{library} can be written as any of
@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
the compiler is passed @samp{-lfoo}.
@end defmac
@defmac AC_HEADER_CHECK (@var{header-file}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex HEADER_CHECK
If @var{header-file} exists, execute shell commands
@ -1634,14 +1726,6 @@ almost always detect them by simply using @code{#ifdef} directives in
your programs.
@end defmac
@defmac AC_PROGRAM_CHECK (@var{variable}, @var{prog-to-check-for}, @var{value-if-found} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_CHECK
Check whether program @var{prog-to-check-for} exists in @code{PATH}. If
it is found, set @var{variable} to @var{value-if-found}, otherwise 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_PROGRAM_EGREP (@var{pattern}, @var{program}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex PROGRAM_EGREP
@var{program} is the text of a C or C++ program, on which shell variable and
@ -1657,32 +1741,6 @@ on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_PROGRAM_PATH (@var{variable}, @var{prog-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAM_PATH
Similar to @code{AC_PROGRAM_CHECK}, 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_PROGRAMS_CHECK (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_CHECK
Check for each program in the whitespace-separated list
@var{progs-to-check-for} exists in @code{PATH}. If it is found, set
@var{variable} to the name of that program. Otherwise, continue
checking the next program in the list. If none of the programs in the
list are found, set @var{variable} to @var{value-if-not-found}; if
@var{value-if-not-found} is not specified, the value of @var{variable}
is not changed. Calls @code{AC_SUBST} for @var{variable}.
@end defmac
@defmac AC_PROGRAMS_PATH (@var{variable}, @var{progs-to-check-for} @r{[}, @var{value-if-not-found}@r{]})
@maindex PROGRAMS_PATH
Like @code{AC_PROGRAMS_CHECK}, but if any of @var{progs-to-check-for}
are found, set @var{variable} to the entire pathname of the program
found.
@end defmac
@defmac AC_REPLACE_FUNCS (@var{function-name}@dots{})
@maindex REPLACE_FUNCS
For each given @var{function-name} in the whitespace-separated argument
@ -1720,8 +1778,22 @@ on which language is current, @pxref{Language Choice}), if it hasn't
been called already.
@end defmac
@defmac AC_TEST_LINK (@var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex TEST_LINK
Create a test C program to see whether a function whose body consists of
@var{function-body} can be compiled and linked; @var{includes} is any
@code{#include} statements needed by the code in @var{function-body}.
If the file compiles and links successfully, run shell commands
@var{action-if-found}, otherwise run @var{action-if-not-found}.
@end defmac
@defmac AC_TEST_PROGRAM (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
@maindex TEST_PROGRAM
This is an obsolete alias for @code{AC_TEST_RUN}.
@end defmac
@defmac AC_TEST_RUN (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
@maindex TEST_RUN
@var{program} is the text of a C program, on which shell variable and
backquote substitutions are performed. If it compiles and links
successfully and returns an exit status of 0 when executed, run shell
@ -1736,28 +1808,35 @@ run. If that argument is given, this macro calls @code{AC_CROSS_CHECK}
if it has not already been called (@pxref{Compiler Characteristics}).
@end defmac
@node Command Line, Setting Variables, General Feature Tests, General Purpose Macros
@node Command Line, Setting Variables, C Features, General Purpose Macros
@section Checking Command Line Arguments
These macros check whether the user gave @code{configure} various
command line arguments. Like the general feature tests (@pxref{General
Feature Tests}), they may take an argument to use if the argument was
Purpose Macros}), they may take an argument to use if the argument was
given and one for if it was not given.
@defmac AC_ENABLE (@var{feature}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ENABLE
@defmac AC_ARG_ENABLE (@var{feature}, @var{help-string}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ARG_ENABLE
If the user gave @code{configure} the option
@samp{--enable-@var{feature}} or @samp{--disable-@var{feature}}, run
shell commands @var{action-if-true}. Otherwise run shell commands
@var{action-if-false}. The name @var{feature} should consist only of
alphanumeric characters and dashes.
@var{action-if-false}. @var{help-string} is a description of
the option which looks like this:
@example
--enable-readline support fancy command line editing
@end example
@noindent
@var{help-string} may be more than one line long, if more detail is
needed. Just make sure the columns line up in @samp{configure --help}.
The @var{feature} indicates an optional user-level facility. This
option allows users to choose which optional features to build and
install. @samp{--enable-@var{feature}} options should never make a
feature behave differently or cause one feature to replace another.
They should only cause parts of the program to be built rather than left
out.
The name @var{feature} should consist only of alphanumeric characters
and dashes. The @var{feature} indicates an optional user-level
facility. This option allows users to choose which optional features to
build and install. @samp{--enable-@var{feature}} options should never
make a feature behave differently or cause one feature to replace
another. They should only cause parts of the program to be built rather
than left out.
The user can give an argument by following the feature name with
@samp{=} and the argument. Giving an argument of @samp{no} indicates
@ -1770,34 +1849,28 @@ the shell variable @code{enableval}. If no argument was given to
@samp{--disable-@var{feature}} is equivalent to
@samp{--enable-@var{feature}=no}. At present, arguments containing blanks
are not handled correctly; if you need an argument to contain a list,
require the items to be separated by commas instead. (This restriction
might disappear in the future.)
require the items to be separated by commas instead.
@end defmac
@defmac AC_PREFIX (@var{program})
@maindex PREFIX
If the user did not specify an installation prefix (using the
@samp{--prefix} option), guess a value for it by looking for
@var{program} in @code{PATH}, the way the shell does. If @var{program}
is found, set the prefix to the parent of the directory containing
@var{program}; otherwise leave the prefix specified in
@file{Makefile.in} unchanged. For example, if @var{program} is
@code{gcc} and the @code{PATH} contains @file{/usr/local/gnu/bin/gcc},
set the prefix to @file{/usr/local/gnu}.
@end defmac
@defmac AC_WITH (@var{package}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex WITH
@defmac AC_ARG_WITH (@var{package}, @var{help-string}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ARG_WITH
If the user gave @code{configure} the option @samp{--with-@var{package}}
or @samp{--without-@var{package}}, run shell commands
@var{action-if-true}. Otherwise run shell commands
@var{action-if-false}. The name @var{package} should consist only of
alphanumeric characters and dashes.
@var{action-if-false}. @var{help-string} is a description of
the option which looks like this:
@example
--with-gnu-as use the GNU assembler
@end example
@noindent
@var{help-string} may be more than one line long, if more detail is
needed. Just make sure the columns line up in @samp{configure --help}.
The @var{package} indicates another software package that this program
should work with. For example, @samp{--with-gnu-ld} means work with the
GNU linker instead of some other linker. @samp{--with-x11} means work
with X11.
The name @var{package} should consist only of alphanumeric characters
and dashes. The @var{package} indicates another software package that
this program should work with. For example, @samp{--with-gnu-ld} means
work with the GNU linker instead of some other linker.
@samp{--with-x11} means work with X11.
The user can give an argument by following the package name with
@samp{=} and the argument. Giving an argument of @samp{no} is for
@ -1813,8 +1886,19 @@ the shell variable @code{withval}. If no argument was given to
@samp{--without-@var{package}} is equivalent to
@samp{--with-@var{package}=no}. At present, arguments containing blanks
are not handled correctly; if you need an argument to contain a list,
require the items to be separated by commas instead. (This restriction
might disappear in the future.)
require the items to be separated by commas instead.
@end defmac
@defmac AC_ENABLE (@var{feature}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex ENABLE
This is an obsolete version of @code{AC_ARG_ENABLE} that does not
provide a help string.
@end defmac
@defmac AC_WITH (@var{package}, @var{action-if-true} @r{[}, @var{action-if-false}@r{]})
@maindex WITH
This is an obsolete version of @code{AC_ARG_WITH} that does not
provide a help string.
@end defmac
@node Setting Variables, Printing Messages, Command Line, General Purpose Macros
@ -1923,6 +2007,17 @@ LIBS="$LIBS -ltermcap"
@end example
@end defmac
@ignore
@defmac AC_SUBST_FILE (@var{variable}, @var{file})
@maindex SUBST_FILE
Substitute the contents of the file @file{@var{srcdir}/@var{file}} into
@file{Makefile} variable @var{variable} when creating the output files
(typically one or more @file{Makefile}s). This macro is useful for
inserting @file{Makefile} fragments for particular host or tartet types
into @file{Makefile}s.
@end defmac
@end ignore
@node Printing Messages, Language Choice, Setting Variables, General Purpose Macros
@section Printing Messages
@ -2272,19 +2367,19 @@ come later should contain a call to @code{AC_PROVIDE}.
For example, @code{AC_AIX} contains
@example
AC_BEFORE([$0], [AC_COMPILE_CHECK])
AC_BEFORE([$0], [AC_TEST_LINK])
@end example
@noindent
and @code{AC_COMPILE_CHECK} contains
and @code{AC_TEST_LINK} contains
@example
AC_PROVIDE([$0])
@end example
@noindent
As a result, if @code{AC_AIX} is called after @code{AC_COMPILE_CHECK},
it will note that @code{AC_COMPILE_CHECK} has already been called and
As a result, if @code{AC_AIX} is called after @code{AC_TEST_LINK},
it will note that @code{AC_TEST_LINK} has already been called and
print a warning message.
@node Checking for Files, Checking for Symbols, Dependencies Between Macros, Writing Macros
@ -2308,7 +2403,7 @@ 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_HEADER_EGREP} if the symbol is not a C preprocessor
macro (@pxref{General Feature Tests}), or compile a small test program that includes
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
@ -2355,16 +2450,16 @@ 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_COMPILE_CHECK} (@pxref{General Feature Tests}). You have to write a
@code{AC_TEST_LINK} (@pxref{C Features}). You have to write a
test program by hand. You can compile and run it using
@code{AC_TEST_PROGRAM} (@pxref{General Feature Tests}).
@code{AC_TEST_RUN} (@pxref{C Features}).
Try to avoid writing test programs if possible, because using them
prevents people from configuring your package for cross-compiling. If
it's really best that you test for a run-time behavior, try to provide a
default ``worst case'' value to use when cross-compiling makes run-time
tests impossible. You do this by passing the optional last argument to
@code{AC_TEST_PROGRAM}.
@code{AC_TEST_RUN}.
@menu
* Guidelines:: General rules for writing test programs.
@ -2526,7 +2621,7 @@ redundant.
@defvar LIBOBJS
Names of object files (ending in @file{.o}). Set by
@code{AC_REPLACE_FUNCS} (@pxref{General Feature Tests}).
@code{AC_REPLACE_FUNCS} (@pxref{C Features}).
@end defvar
@node VPATH Substitutions, Automatic Remaking, Predefined Variables, Makefiles
@ -2791,7 +2886,14 @@ The shell with which to run @code{configure} for the @samp{--recheck}
option. The default is @file{/bin/sh}.
@end defvar
The following two variables provide one way for separately distributed
@defvar CONFIG_STATUS
The file name to use for the shell script that records the
configuration. The default is @file{./config.status}. This variable is
useful when one package uses parts of another and the @file{configure}
scripts shouldn't be merged because they are maintained separately.
@end defvar
The following variables provide one way for separately distributed
packages to share the values computed by @code{configure}. Doing so can
be useful if some of the packages need a superset of the features that
one of them, perhaps a common library, does. These variables allow a

242
lib/autoconf/general.m4
View File

@ -29,35 +29,16 @@ dnl
ifdef([__gnu__], , [errprint(Autoconf requires GNU m4
)m4exit(2)])dnl
dnl
dnl
dnl ### Utility functions for stamping the configure script.
dnl
dnl
define(AC_ACVERSION, 1.91)dnl
define(AC_ACVERSION, 1.93)dnl
dnl This is defined by the --version option of the autoconf script.
ifdef([AC_PRINT_VERSION], [errprint(Autoconf version AC_ACVERSION
)])dnl
dnl
dnl These are currently not used, for the sake of people who diff
dnl configure scripts and don't want spurious differences.
dnl But they are too clever to just delete.
dnl
define(AC_USER, [esyscmd(
changequote({,})dnl
# Extract the user name from the first pair of parentheses.
({ac_sedcmd='s/[^(]*(\([^)]*\)).*/\1/';}
changequote([,])dnl
whoami || id|sed "$ac_sedcmd") 2>/dev/null|tr -d '\012')])dnl
dnl
define(AC_HOST, [esyscmd((hostname || uname -n) 2>/dev/null|tr -d '\012')])dnl
dnl
define(AC_DATE, [esyscmd(date|tr -d '\012')])dnl
)m4exit(0)])dnl
dnl
dnl
dnl ### Controlling Autoconf operation
dnl
dnl
dnl Diversions:
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
@ -66,13 +47,9 @@ 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
dnl
dnl This is separate from AC_INIT to prevent GNU m4 1.0 from coredumping
dnl when AC_CONFIG_HEADER is used.
define(AC_NOTICE,
[# Guess values for system-dependent variables and create Makefiles.
dnl [#] Generated automatically using autoconf.
# Generated automatically using autoconf version] AC_ACVERSION [
dnl [#] by AC_USER@AC_HOST on AC_DATE
# Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
#
# This configure script is free software; you can redistribute it and/or
@ -91,12 +68,13 @@ dnl [#] by AC_USER@AC_HOST on AC_DATE
])dnl
dnl
define(AC_PARSEARGS,
[AC_BEFORE([$0], AC_ARG_ENABLE)dnl
AC_BEFORE([$0], AC_ARG_WITH)dnl
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
# Save the original args to write them into config.status later.
configure_args="[$]*"
# Omit internal or obsolete options to make the list less imposing.
# Omit some internal, obsolete, or unimplemented options to make the
# list less imposing.
changequote(,)dnl
ac_usage="Usage: configure [options] [host]
Options: [defaults in brackets after descriptions]
@ -130,12 +108,12 @@ changequote([,])dnl
# dashes changed to underlines.
build=NONE
cache_file=./config.cache
exec_prefix=
exec_prefix=NONE
host=NONE
no_create=
nonopt=NONE
norecursion=
prefix=
prefix=NONE
program_prefix=
program_suffix=
program_transform_name=
@ -382,8 +360,12 @@ AC_PREPARE($1)])dnl
dnl
dnl AC_PREPARE(UNIQUE-FILE-IN-SOURCE-DIR)
define(AC_PREPARE,
[AC_BEFORE([$0], AC_ARG_ENABLE)dnl
AC_BEFORE([$0], AC_ARG_WITH)dnl
[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
trap 'rm -fr conftest* confdefs* core $ac_clean_files; exit 1' 1 2 15
trap 'rm -fr confdefs* $ac_clean_files' 0
@ -392,8 +374,9 @@ trap 'rm -fr confdefs* $ac_clean_files' 0
# 1 file creation
# 2 errors and warnings
# 3 unused; some systems may open it to /dev/tty
# 4 checking for...
# 4 checking for... messages
# 5 test results
# 6 compiler messages
if test "$silent" = yes; then
exec 4>/dev/null
else
@ -404,6 +387,12 @@ if test "$verbose" = yes; then
else
exec 5>/dev/null
fi
exec 6>./config.log
echo "\
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
" 1>&6
# Save the original args if we used an alternate arg parser.
ac_configure_temp="${configure_args-[$]*}"
@ -458,7 +447,12 @@ if test ! -r $srcdir/$ac_unique_file; then
AC_ERROR(can not find sources in ${srcdir})
fi
fi
ifdef([AC_LIST_PREFIX_PROGRAM], [AC_PREFIX(AC_LIST_PREFIX_PROGRAM)])dnl
dnl Let the site file select an alternate cache file if it wants to.
AC_SITE_LOAD
AC_CACHE_LOAD
AC_LANG_C
undivert(AC_DIVERSION_ARG_ENABLE)dnl
undivert(AC_DIVERSION_ARG_WITH)dnl
@ -466,7 +460,8 @@ undivert(AC_DIVERSION_ARG_WITH)dnl
dnl
dnl AC_ARG_ENABLE(FEATURE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_ENABLE,
[divert(AC_DIVERSION_HELP_ENABLE)dnl
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_ENABLE)dnl
$2
divert(AC_DIVERSION_ARG_ENABLE)dnl
AC_ENABLE_INTERNAL([$1], [$3], [$4])dnl
@ -492,7 +487,8 @@ fi
dnl
dnl AC_ARG_WITH(PACKAGE, HELP-STRING, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_ARG_WITH,
[divert(AC_DIVERSION_HELP_WITH)dnl
[AC_PROVIDE([$0])dnl
divert(AC_DIVERSION_HELP_WITH)dnl
$2
divert(AC_DIVERSION_ARG_WITH)dnl
AC_WITH_INTERNAL([$1], [$3], [$4])dnl
@ -517,10 +513,10 @@ fi
])dnl
dnl
dnl AC_CONFIG_HEADER(HEADER-TO-CREATE ...)
define(AC_CONFIG_HEADER, [define(AC_LIST_HEADERS, $1)])dnl
define(AC_CONFIG_HEADER, [AC_PROVIDE([$0])define(AC_LIST_HEADERS, $1)])dnl
dnl
dnl AC_REVISION(REVISION-INFO)
define(AC_REVISION, [AC_REQUIRE([AC_BINSH])dnl
define(AC_REVISION, [AC_PROVIDE([$0])AC_REQUIRE([AC_BINSH])dnl
[# From configure.in] translit([$1],$")])dnl
dnl
dnl Subroutines of AC_PREREQ.
@ -543,16 +539,44 @@ dnl
dnl Complain and exit if the Autoconf version is less than $1.
dnl AC_PREREQ(VERSION)
define(AC_PREREQ,
[AC_PREREQ_COMPARE(AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)),
[AC_PROVIDE([$0])dnl
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_REQUIRE([AC_CONFIG_AUXDIR_DEFAULT])dnl
[AC_PROVIDE([$0])dnl
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
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],[$1])])dnl
define(AC_PREFIX_INTERNAL,
[if test "x$prefix" = xNONE; then
changequote(<<,>>)dnl
define(<<AC_VAR_NAME>>, translit($1, [a-z], [A-Z]))dnl
changequote([,])dnl
AC_PROGRAM_PATH(AC_VAR_NAME, $1)
changequote(<<,>>)dnl
if test -n "$ac_cv_path_<<>>AC_VAR_NAME"; then
prefix=`echo $ac_cv_path_<<>>AC_VAR_NAME|sed 's%/[^/][^/]*/[^/][^/]*$%%'`
changequote([,])dnl
dnl test -z "$prefix" && prefix=/
AC_VERBOSE(setting installation directory prefix to ${prefix})
fi
fi
undefine(AC_VAR_NAME)dnl
])dnl
define(AC_PREFIX,
[AC_OBSOLETE([$0], [; instead use AC_PREFIX_PROGRAM before AC_INIT])dnl
AC_PREFIX_INTERNAL([$1])])dnl
dnl
dnl
dnl ### Canonicalizing the system type
dnl
@ -560,21 +584,21 @@ dnl
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_AUXDIR(DIR)
define(AC_CONFIG_AUXDIR,
[AC_CONFIG_AUXDIR_DIRS($1 ${srcdir}/$1)])dnl
dnl AC_CONFIG_AUX_DIR(DIR)
define(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_AUXDIR_DEFAULT,
[AC_CONFIG_AUXDIR_DIRS(${srcdir} ${srcdir}/.. ${srcdir}/../..)])dnl
define(AC_CONFIG_AUX_DIR_DEFAULT,
[AC_CONFIG_AUX_DIRS(${srcdir} ${srcdir}/.. ${srcdir}/../..)])dnl
dnl
dnl Internal subroutine.
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_AUXDIR_DIRS(DIR ...)
define(AC_CONFIG_AUXDIR_DIRS,
dnl AC_CONFIG_AUX_DIRS(DIR ...)
define(AC_CONFIG_AUX_DIRS,
[ac_aux_dir=
for ac_dir in $1; do
if test -f $ac_dir/install.sh; then
@ -588,12 +612,12 @@ ac_config_guess=${ac_aux_dir}/config.guess
ac_config_sub=${ac_aux_dir}/config.sub
ac_configure=${ac_aux_dir}/configure # This should be Cygnus configure.
ac_install_sh="${ac_aux_dir}/install.sh -c"
AC_PROVIDE([AC_CONFIG_AUXDIR_DEFAULT])dnl
AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
])dnl
dnl
dnl Canonicalize the host, target, and build system types.
define(AC_CANON_SYSTEM,
[AC_REQUIRE([AC_CONFIG_AUXDIR_DEFAULT])dnl
define(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:
# configure --host=HOST --target=TARGET --build=BUILD NONOPT
@ -623,14 +647,14 @@ if ${ac_config_sub} sun4 >/dev/null 2>&1; then :
else AC_ERROR(can not run ${ac_config_sub})
fi
AC_CANON_HOST
AC_CANON_TARGET
AC_CANON_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AC_CANONICAL_BUILD
])dnl
dnl
dnl Subroutines of AC_CANON_SYSTEM.
dnl Subroutines of AC_CANONICAL_SYSTEM.
dnl
define(AC_CANON_HOST,
define(AC_CANONICAL_HOST,
[AC_CHECKING(host type)
case "${host_alias}" in
@ -653,7 +677,7 @@ AC_SUBST(host)dnl
AC_SUBST(host_alias)dnl
])dnl
dnl
define(AC_CANON_TARGET,
define(AC_CANONICAL_TARGET,
[AC_CHECKING(target type)
case "${target_alias}" in
@ -673,7 +697,7 @@ AC_SUBST(target)dnl
AC_SUBST(target_alias)dnl
])dnl
dnl
define(AC_CANON_BUILD,
define(AC_CANONICAL_BUILD,
[AC_CHECKING(build type)
case "${build_alias}" in
@ -690,30 +714,38 @@ AC_SUBST(build)dnl
AC_SUBST(build_alias)dnl
])dnl
dnl
dnl Put the contents of file $2 into Makefile variable $1.
dnl Useful for inserting Makefile fragments into Makefiles.
dnl AC_SUBST_FILE(VARIABLE, FILE)
define(AC_SUBST_FILE,
[AC_SUBST($1)dnl
if test -f ${srcdir}/$2; then
AC_VERBOSE(using $2 for $1)
$1=`cat ${srcdir}/$2`
fi
])dnl
dnl
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_MAKE_LINKS(LINK ..., FILE ...)
define(AC_MAKE_LINKS,
dnl AC_LINK_FILES(LINK ..., FILE ...)
define(AC_LINK_FILES,
[define([AC_LIST_LINKS],[$1])define([AC_LIST_FILES],[$2])])dnl
dnl
dnl
dnl ### Caching test results
dnl
dnl
dnl Look for site or system specific initialization scripts.
define(AC_SITE_LOAD,
[ac_site_dirs=/usr/local
if test "x$prefix" != xNONE; then
ac_site_dirs=$prefix
fi
# System dependent files override system independent ones in case of conflict.
if test "x$exec_prefix" != xNONE && test "x$exec_prefix" != "x$prefix"; then
ac_site_dirs="$ac_site_dirs $exec_prefix"
fi
for ac_site_dir in $ac_site_dirs; do
ac_site_file=$ac_site_dir/lib/config.site
if test -r "$ac_site_file"; then
AC_VERBOSE(loading site initialization script $ac_site_file)
. $ac_site_file
fi
done
])dnl
dnl
define(AC_CACHE_LOAD,
[if test -r $cache_file; then
[if test -r "$cache_file"; then
AC_VERBOSE(loading test results from cache file $cache_file)
. $cache_file
else
@ -728,7 +760,7 @@ cat > $cache_file <<\CEOF
# This file is a shell script that caches the results of configure
# tests run on this system so they can be shared between configure
# scripts and configure runs. It is not useful on other systems.
# If its contents are invalid for some reason, you may edit or delete it.
# If its contents are invalid for some reason, you may delete or edit it.
#
# By default, configure uses ./config.cache as the cache file,
# creating it if it does not exist already. You can give configure
@ -739,7 +771,8 @@ cat > $cache_file <<\CEOF
# --recheck option to rerun configure.
CEOF
changequote(,)dnl
set | sed -n "/^[a-zA-Z0-9_]*_cv_/s/=\(.*\)/='\1'/p" >> $cache_file
dnl Allow a site initialization script to override cache values.
set | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
changequote([,])dnl
fi])dnl
dnl
@ -888,7 +921,7 @@ 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 $LIBS >/dev/null 2>&1'
ac_compile='${CC-cc} $CFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&6 2>&6'
])dnl
dnl
define(AC_LANG_CPLUSPLUS,
@ -897,7 +930,7 @@ 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}'
ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS >/dev/null 2>&1'
ac_compile='${CXX-gcc} $CXXFLAGS $LDFLAGS conftest.${ac_ext} -o conftest $LIBS 1>&6 2>&6'
])dnl
dnl
dnl Push the current language on a stack.
@ -940,25 +973,25 @@ define(AC_PROGRAM_CHECK,
[# Extract the first word of "$2", so it can be a program name with args.
set dummy $2; ac_word=[$]2
AC_CHECKING([for $ac_word])
AC_CACHE_VAL(ac_cv_program_$1,
AC_CACHE_VAL(ac_cv_prog_$1,
[if test -n "[$]$1"; then
ac_cv_program_$1="[$]$1" # Let the user override the test.
ac_cv_prog_$1="[$]$1" # Let the user override the test.
else
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
for ac_dir in $PATH; do
test -z "$ac_dir" && ac_dir=.
if test -f $ac_dir/$ac_word; then
ac_cv_program_$1="$3"
ac_cv_prog_$1="$3"
break
fi
done
IFS="$ac_save_ifs"
dnl If no 4th arg is given, leave the cache variable unset,
dnl so AC_PROGRAMS_CHECK will keep looking.
ifelse([$4],,, [ test -z "[$]ac_cv_program_$1" && ac_cv_program_$1="$4"
ifelse([$4],,, [ test -z "[$]ac_cv_prog_$1" && ac_cv_prog_$1="$4"
])dnl
fi])dnl
$1="$ac_cv_program_$1"
$1="$ac_cv_prog_$1"
test -n "[$]$1" && AC_VERBOSE(setting $1 to [$]$1)
AC_SUBST($1)dnl
])dnl
@ -1018,28 +1051,6 @@ done
ifelse([$3],,, [test -n "[$]$1" || $1="$3"
])])dnl
dnl
dnl Guess the value for the `prefix' variable by looking for
dnl the argument program along PATH and taking its parent.
dnl Example: if the argument is `gcc' and we find /usr/local/gnu/bin/gcc,
dnl set `prefix' to /usr/local/gnu.
dnl AC_PREFIX(PROGRAM)
define(AC_PREFIX,
[if test -z "$prefix"; then
changequote(<<,>>)dnl
define(<<AC_VAR_NAME>>, translit($1, [a-z], [A-Z]))dnl
changequote([,])dnl
AC_PROGRAM_PATH(AC_VAR_NAME, $1)
changequote(<<,>>)dnl
if test -n "$ac_cv_path_<<>>AC_VAR_NAME"; then
prefix=`echo $ac_cv_path_<<>>AC_VAR_NAME|sed 's%/[^/][^/]*/[^/][^/]*$%%'`
changequote([,])dnl
test -z "$prefix" && prefix=/
AC_VERBOSE(setting installation directory prefix to ${prefix})
fi
fi
undefine(AC_VAR_NAME)dnl
])dnl
dnl
dnl AC_HAVE_LIBRARY(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
define(AC_HAVE_LIBRARY, [dnl
changequote(/,/)dnl
@ -1106,7 +1117,8 @@ 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
AC_OBSOLETE([$0], [; instead use AC_TEST_LINK])dnl
dnl It's actually ok to use this, if you don't care about caching.
dnl AC_OBSOLETE([$0], [; instead use AC_TEST_LINK])dnl
ifelse([$1], , , [AC_CHECKING([for $1])
])dnl
AC_TEST_LINK([$2], [$3], [$4], [$5])dnl
@ -1134,14 +1146,15 @@ fi
rm -f conftest*]
)dnl
dnl
dnl AC_TEST_PROGRAM(PROGRAM, ACTION-IF-TRUE [, ACTION-IF-FALSE
dnl [, ACTION-IF-CROSS-COMPILING]])
define(AC_TEST_PROGRAM,
dnl AC_TEST_RUN(PROGRAM, ACTION-IF-TRUE [, ACTION-IF-FALSE
dnl [, ACTION-IF-CROSS-COMPILING]])
define(AC_TEST_RUN,
[AC_PROVIDE([$0])dnl
AC_REQUIRE([AC_CROSS_CHECK])dnl
if test -n "$cross_compiling"; then
ifelse([$4], , AC_ERROR(can not run test program while cross compiling),
[$4
[AC_VERBOSE(using default for cross-compiling)
$4
])
else
cat > conftest.${ac_ext} <<EOF
@ -1157,6 +1170,9 @@ ifelse([$3], , , [else
fi
fi
rm -fr conftest*])dnl
dnl Obsolete name, which is less clear about what the macro does,
dnl but is otherwise ok to use.
define(AC_TEST_PROGRAM, [AC_TEST_RUN([$1], [$2], [$3], [$4])])dnl
dnl
dnl AC_TEST_CPP(INCLUDES, ACTION-IF-TRUE [, ACTION-IF-FALSE])
define(AC_TEST_CPP,
@ -1202,7 +1218,8 @@ dnl AC_FUNC_CHECK(FUNCTION, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
define(AC_FUNC_CHECK,
[AC_CHECKING([for $1])
AC_CACHE_VAL(ac_cv_func_$1,
[AC_TEST_LINK([#include <ctype.h>], [
[AC_TEST_LINK(
[#include <ctype.h> /* Arbitrary system header to define __stub macros. */], [
/* The GNU C library defines this for functions which it implements
to always fail with ENOSYS. Some functions are actually named
something starting with __ and the normal name is an alias. */
@ -1266,15 +1283,14 @@ define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
changequote([,])dnl
AC_CHECKING(size of $1)
AC_CACHE_VAL(AC_CV_NAME,
[dnl If cross-compiling, the caller has to decide what to do; we can't.
AC_TEST_PROGRAM([#include <stdio.h>
[AC_TEST_RUN([#include <stdio.h>
main()
{
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
fprintf(f, "%d\n", sizeof($1));
exit(0);
}], AC_CV_NAME=`cat conftestval`, AC_ERROR(can not determine size of $1))])dnl
}], AC_CV_NAME=`cat conftestval`)])dnl
AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME)
undefine(AC_TYPE_NAME)dnl
undefine(AC_CV_NAME)dnl
@ -1288,9 +1304,9 @@ dnl AC_OUTPUT([FILE...] [,EXTRA-CMDS])
define(AC_OUTPUT,
[AC_CACHE_SAVE
test -z "$prefix" && prefix=/usr/local
test "x$prefix" = xNONE && prefix=/usr/local
# Let make expand exec_prefix.
test -z "$exec_prefix" && exec_prefix='${prefix}'
test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
# Any assignment to VPATH causes Sun make to only execute
# the first set of double-colon rules, so remove it if not needed.

133
lib/autoconf/specific.m4
View File

@ -28,58 +28,60 @@ define(AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_PROVIDE([$0])dnl
AC_PROGRAM_CHECK(CC, gcc, gcc, cc)
# Find out if we are using GNU C, under whatever name.
cat > conftest.c <<EOF
AC_CACHE_VAL(ac_cv_prog_gcc,
[cat > conftest.c <<EOF
#ifdef __GNUC__
yes
#endif
EOF
${CC-cc} -E conftest.c > conftest.out 2>&1
if egrep yes conftest.out >/dev/null 2>&1; then
GCC=yes
if ${CC-cc} -E conftest.c 2>&6 | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gcc=yes
else
GCC=
fi
rm -f conftest*
ac_cv_prog_gcc=no
fi])dnl
if test "$ac_cv_prog_gcc" = yes; then GCC=yes; else GCC= ; fi
])dnl
dnl
define(AC_PROG_CXX,
[AC_BEFORE([$0],[AC_PROG_CXXCPP])dnl
AC_PROVIDE([$0])dnl
AC_PROGRAMS_CHECK(CXX, $CCC c++ g++ gcc CC cxx, gcc)
# Find out if we are using GNU C++, under whatever name.
cat > conftest.C <<EOF
AC_CACHE_VAL(ac_cv_prog_gxx,
[cat > conftest.C <<EOF
#ifdef __GNUC__
yes
#endif
EOF
${CXX-gcc} -E conftest.C > conftest.out 2>&1
if egrep yes conftest.out >/dev/null 2>&1; then
GXX=yes
if ${CXX-gcc} -E conftest.C 2>&6 | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gxx=yes
else
GXX=
fi
rm -f conftest*
ac_cv_prog_gxx=no
fi])dnl
if test "$ac_cv_prog_gxx" = yes; then GXX=yes; else GXX= ; fi
])dnl
dnl
define(AC_GCC_TRADITIONAL,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
if test "$GCC" = yes; then
if test "$ac_cv_prog_gcc" = yes; then
AC_CHECKING(whether -traditional is needed)
changequote(,)dnl
ac_pattern="Autoconf.*'x'"
changequote([,])dnl
AC_CACHE_VAL(ac_cv_prog_gcc_traditional,
[ ac_pattern="Autoconf.*'x'"
ac_prog='#include <sgtty.h>
Autoconf TIOCGETP'
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_need_trad=yes, ac_need_trad=no)
AC_PROGRAM_EGREP($ac_pattern, $ac_prog,
ac_cv_prog_gcc_traditional=yes, ac_cv_prog_gcc_traditional=no)
if test "$ac_need_trad" = no; then
if test "$ac_cv_prog_gcc_traditional" = no; then
ac_prog='#include <termio.h>
Autoconf TCGETA'
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_need_trad=yes)
fi
if test "$ac_need_trad" = yes; then
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_cv_prog_gcc_traditional=yes)
fi])dnl
if test "$ac_cv_prog_gcc_traditional" = yes; then
CC="$CC -traditional"
AC_VERBOSE(setting CC to $CC)
fi
@ -96,15 +98,15 @@ echo 'foo(){}' > conftest.c
# Make sure it works both with $CC and with simple cc.
# We do the test twice because some compilers refuse to overwrite an
# existing .o file with -o, though they will create one.
if ${CC-cc} -c conftest.c -o conftest.o >/dev/null 2>&1 \
&& test -f conftest.o && ${CC-cc} -c conftest.c -o conftest.o >/dev/null 2>&1
if ${CC-cc} -c conftest.c -o conftest.o 1>&6 2>&6 &&
test -f conftest.o && ${CC-cc} -c conftest.c -o conftest.o 1>&6 2>&6
then
if test "x$CC" != xcc; then
# Test first that cc exists at all.
if cc -c conftest.c >/dev/null 2>&1
if cc -c conftest.c 1>&6 2>&6
then
if cc -c conftest.c -o conftest2.o >/dev/null 2>&1 && \
test -f conftest2.o && cc -c conftest.c -o conftest2.o >/dev/null 2>&1
if cc -c conftest.c -o conftest2.o 1>&6 2>&6 &&
test -f conftest2.o && cc -c conftest.c -o conftest2.o 1>&6 2>&6
then
:
else
@ -230,7 +232,7 @@ AC_SUBST(LEX_OUTPUT_ROOT)dnl
])dnl
dnl
define(AC_PROG_INSTALL,
[AC_REQUIRE([AC_CONFIG_AUX_DEFAULT])dnl
[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,
# or the SunOS /usr/etc/install directory, or the AIX /bin/install,
@ -249,7 +251,7 @@ define(AC_PROG_INSTALL,
# by make from ./install.sh.
AC_CHECKING(for a BSD compatible install)
if test -z "${INSTALL}"; then
AC_CACHE_VAL(ac_cv_path_INSTALL,
AC_CACHE_VAL(ac_cv_path_install,
[ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
for ac_dir in $PATH; do
case "$ac_dir" in
@ -264,7 +266,7 @@ AC_CACHE_VAL(ac_cv_path_INSTALL,
# OSF/1 installbsd also uses dspmsg, but is usable.
:
else
ac_cv_path_INSTALL="$ac_dir/$ac_prog -c"
ac_cv_path_install="$ac_dir/$ac_prog -c"
break 2
fi
fi
@ -274,8 +276,8 @@ AC_CACHE_VAL(ac_cv_path_INSTALL,
done
IFS="$ac_save_ifs"
# As a last resort, use the slow shell script.
test -z "$ac_cv_path_INSTALL" && ac_cv_path_INSTALL="$ac_install_sh"])dnl
INSTALL="$ac_cv_path_INSTALL"
test -z "$ac_cv_path_install" && ac_cv_path_install="$ac_install_sh"])dnl
INSTALL="$ac_cv_path_install"
fi
AC_SUBST(INSTALL)dnl
AC_VERBOSE(setting INSTALL to $INSTALL)
@ -348,7 +350,7 @@ fi
if test "$ac_stdc_hdrs" = yes; then
# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
AC_TEST_PROGRAM([#include <ctype.h>
AC_TEST_RUN([#include <ctype.h>
#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
#define XOR(e,f) (((e) && !(f)) || (!(e) && (f)))
@ -402,14 +404,12 @@ AC_DIR_HEADER_CHECK(sys/dir.h, SYSDIR)
AC_DIR_HEADER_CHECK(ndir.h, NDIR)
AC_CHECKING(for closedir return value)
AC_TEST_PROGRAM([#include <sys/types.h>
AC_TEST_RUN([#include <sys/types.h>
#include <$ac_dir_header>
int closedir(); main() { exit(closedir(opendir(".")) != 0); }], ,
AC_DEFINE(VOID_CLOSEDIR))
])dnl
dnl Subroutine of AC_DIR_HEADER.
dnl ??? I tried to put this define inside AC_DIR_HEADER, but when I did
dnl that, $1 and $2 did not get expanded. --roland
dnl Check if $1 is the winning directory library header file.
dnl It must not only exist, but also correctly define the `DIR' type.
dnl If it is really winning, define $2 and set shell var `ac_dir_header' to $1.
@ -486,7 +486,7 @@ main()
exit ((n > 0 && gidset[n] != val.gval) ? 1 : 0);
}'
changequote([,])dnl
AC_TEST_PROGRAM([$ac_prog],
AC_TEST_RUN([$ac_prog],
AC_DEFINE(GETGROUPS_T, gid_t), AC_DEFINE(GETGROUPS_T, int))
])dnl
dnl
@ -535,7 +535,7 @@ dnl
dnl
define(AC_MMAP, [
AC_CHECKING(for working mmap)
AC_TEST_PROGRAM([/* Thanks to Mike Haertel and Jim Avera for this test. */
AC_TEST_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
#include <sys/types.h>
#include <fcntl.h>
#include <sys/mman.h>
@ -605,12 +605,9 @@ main()
])dnl
dnl
define(AC_VPRINTF,
[AC_CHECKING([for vprintf])
AC_TEST_LINK( , [vprintf();],
[ac_have_vprintf=yes AC_DEFINE(HAVE_VPRINTF)], ac_have_vprintf=no)
if test "$ac_have_vprintf" = no; then
AC_CHECKING([for _doprnt])
AC_TEST_LINK( , [_doprnt();], AC_DEFINE(HAVE_DOPRNT))
[AC_FUNC_CHECK(vprintf, AC_DEFINE(HAVE_VPRINTF))
if test "$ac_cv_func_vprintf" != yes; then
AC_FUNC_CHECK(_doprnt, AC_DEFINE(HAVE_DOPRNT))
fi
])dnl
dnl
@ -619,7 +616,7 @@ define(AC_VFORK,
AC_HEADER_CHECK(vfork.h, AC_DEFINE(HAVE_VFORK_H))
AC_CHECKING(for working vfork)
AC_REQUIRE([AC_RETSIGTYPE])
AC_TEST_PROGRAM([/* Thanks to Paul Eggert for this test. */
AC_TEST_RUN([/* Thanks to Paul Eggert for this test. */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
@ -704,7 +701,7 @@ main() {
dnl
define(AC_WAIT3,
[AC_CHECKING(for wait3 that fills in rusage)
AC_TEST_PROGRAM([#include <sys/types.h>
AC_TEST_RUN([#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
@ -749,10 +746,12 @@ ac_decl="#ifdef __GNUC__
#ifdef _AIX
#pragma alloca
#else
#ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#endif
#endif
#endif
#endif
"
AC_CHECKING([for alloca])
AC_TEST_LINK($ac_decl,
@ -780,7 +779,7 @@ AC_FUNC_CHECK([GETB67],AC_DEFINE([CRAY_STACKSEG_END],[GETB67]),
AC_FUNC_CHECK([getb67],AC_DEFINE([CRAY_STACKSEG_END],[getb67])))))
AC_CHECKING(stack direction for C alloca)
AC_TEST_PROGRAM([find_stack_direction ()
AC_TEST_RUN([find_stack_direction ()
{
static char *addr = 0;
auto char dummy;
@ -889,7 +888,7 @@ define(AC_UTIME_NULL,
[AC_CHECKING(utime with null argument)
rm -f conftestdata; > conftestdata
# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
AC_TEST_PROGRAM([#include <sys/types.h>
AC_TEST_RUN([#include <sys/types.h>
#include <sys/stat.h>
main() {
struct stat s, t;
@ -901,7 +900,7 @@ rm -f core
])dnl
dnl
define(AC_STRCOLL, [AC_CHECKING(for strcoll)
AC_TEST_PROGRAM([#include <string.h>
AC_TEST_RUN([#include <string.h>
main ()
{
exit (strcoll ("abc", "def") >= 0 ||
@ -911,7 +910,7 @@ main ()
dnl
define(AC_SETVBUF_REVERSED,
[AC_CHECKING(whether setvbuf arguments are reversed)
AC_TEST_PROGRAM([#include <stdio.h>
AC_TEST_RUN([#include <stdio.h>
/* If setvbuf has the reversed format, exit 0. */
main () {
/* This call has the arguments reversed.
@ -999,14 +998,14 @@ define(AC_CROSS_CHECK,
[AC_PROVIDE([$0])dnl
AC_CHECKING(whether cross-compiling)
# If we cannot run a trivial program, we must be cross compiling.
AC_TEST_PROGRAM([main(){exit(0);}], cross_compiling=, cross_compiling=yes)
AC_TEST_RUN([main(){exit(0);}], cross_compiling=, cross_compiling=yes)
if test "$cross_compiling" = yes; then
AC_VERBOSE(we are cross-compiling)
fi])dnl
dnl
define(AC_CHAR_UNSIGNED,
[AC_CHECKING(for unsigned characters)
AC_TEST_PROGRAM(
AC_TEST_RUN(
[/* volatile prevents gcc2 from optimizing the test away on sparcs. */
#if !__STDC__
#define volatile
@ -1023,10 +1022,10 @@ dnl
define(AC_LONG_DOUBLE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_CHECKING(for long double)
if test -n "$GCC"; then
if test "$GCC" = yes; then
AC_DEFINE(HAVE_LONG_DOUBLE)
else
AC_TEST_PROGRAM([int main() {
AC_TEST_RUN([int main() {
/* The Stardent Vistra knows sizeof(long double), but does not support it. */
long double foo = 0.0;
/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
@ -1038,20 +1037,20 @@ dnl
define(AC_INT_16_BITS,
[AC_OBSOLETE([$0], [; instead use AC_SIZEOF_TYPE(int)])
AC_CHECKING(integer size)
AC_TEST_PROGRAM([main() { exit(sizeof(int) != 2); }],
AC_TEST_RUN([main() { exit(sizeof(int) != 2); }],
AC_DEFINE(INT_16_BITS))
])dnl
dnl
define(AC_LONG_64_BITS,
[AC_OBSOLETE([$0], [; instead use AC_SIZEOF_TYPE(long)])
AC_CHECKING(for 64-bit long ints)
AC_TEST_PROGRAM([main() { exit(sizeof(long int) != 8); }],
AC_TEST_RUN([main() { exit(sizeof(long int) != 8); }],
AC_DEFINE(LONG_64_BITS))
])dnl
dnl
define(AC_WORDS_BIGENDIAN,
[AC_CHECKING(byte ordering)
AC_TEST_PROGRAM([main () {
AC_TEST_RUN([main () {
/* Are we little or big endian? From Harbison&Steele. */
union
{
@ -1065,7 +1064,7 @@ AC_TEST_PROGRAM([main () {
dnl
define(AC_ARG_ARRAY,
[AC_CHECKING(whether the address of an argument can be used as an array)
AC_TEST_PROGRAM([main() {
AC_TEST_RUN([main() {
/* Return 0 iff arg arrays are ok. */
exit(!x(1, 2, 3, 4));
}
@ -1186,7 +1185,7 @@ test "$ac_some_dir_failed" = yes || AC_DEFINE(HAVE_LONG_FILE_NAMES)
dnl
define(AC_RESTARTABLE_SYSCALLS,
[AC_CHECKING(for restartable system calls)
AC_TEST_PROGRAM(
AC_TEST_RUN(
[/* Exit 0 (true) if wait returns something other than -1,
i.e. the pid of the child, which means that wait was restarted
after getting the signal. */
@ -1373,8 +1372,8 @@ fi
# It would also be nice to do this for all -L options, not just this one.
if test -n "$x_libraries"; then
X_LIBS="$X_LIBS -L$x_libraries"
if test "`(uname) 2>/dev/null`" = SunOS \
&& uname -r | grep '^5' >/dev/null; then
if test "`(uname) 2>/dev/null`" = SunOS &&
uname -r | grep '^5' >/dev/null; then
X_LIBS="$X_LIBS -R$x_libraries"
fi
fi
@ -1410,13 +1409,13 @@ AC_SUBST(X_EXTRA_LIBS)dnl
dnl
dnl
dnl ### Checks for UNIX variants
dnl These are kludges; we need a better approach.
dnl These are kludges; we need a more systematic approach.
dnl
dnl
define(AC_AIX,
[AC_CHECKING(for AIX)
AC_BEFORE([$0], [AC_TEST_LINK])dnl
AC_BEFORE([$0], [AC_TEST_PROGRAM])dnl
AC_BEFORE([$0], [AC_TEST_RUN])dnl
AC_BEFORE([$0], [AC_TEST_CPP])dnl
AC_PROGRAM_EGREP(yes,
[#ifdef _AIX
@ -1427,7 +1426,7 @@ AC_PROGRAM_EGREP(yes,
dnl
define(AC_MINIX,
[AC_BEFORE([$0], [AC_TEST_LINK])dnl
AC_BEFORE([$0], [AC_TEST_PROGRAM])dnl
AC_BEFORE([$0], [AC_TEST_RUN])dnl
AC_BEFORE([$0], [AC_TEST_CPP])dnl
AC_HEADER_CHECK(minix/config.h, MINIX=yes, MINIX=)
# The Minix shell ca not assign to the same variable on the same line!
@ -1441,7 +1440,7 @@ dnl
define(AC_ISC_POSIX,
[AC_PROVIDE([$0])dnl
AC_BEFORE([$0], [AC_TEST_LINK])dnl
AC_BEFORE([$0], [AC_TEST_PROGRAM])dnl
AC_BEFORE([$0], [AC_TEST_RUN])dnl
AC_BEFORE([$0], [AC_TEST_CPP])dnl
AC_CHECKING(for POSIXized ISC)
if test -d /etc/conf/kconfig.d &&
@ -1449,7 +1448,7 @@ if test -d /etc/conf/kconfig.d &&
then
ISC=yes # If later tests want to check for ISC.
AC_DEFINE(_POSIX_SOURCE)
if test -n "$GCC"; then
if test "$GCC" = yes; then
CC="$CC -posix"
else
CC="$CC -Xp"