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autoconf/lib/m4sugar/m4sh.m4
Akim Demaille dda641324f * lib/m4sugar/m4sh.m4: Use AS_REQUIRE.
2001-10-08 08:22:09 +00:00

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changequote()changequote([, ])include(m4sugar/m4sugar.m4)# -*- Autoconf -*-
# This file is part of Autoconf.
# M4 sugar for common shell constructs.
# Requires GNU M4 and M4sugar.
# Copyright 2000, 2001 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# As a special exception, the Free Software Foundation gives unlimited
# permission to copy, distribute and modify the configure scripts that
# are the output of Autoconf. You need not follow the terms of the GNU
# General Public License when using or distributing such scripts, even
# though portions of the text of Autoconf appear in them. The GNU
# General Public License (GPL) does govern all other use of the material
# that constitutes the Autoconf program.
#
# Certain portions of the Autoconf source text are designed to be copied
# (in certain cases, depending on the input) into the output of
# Autoconf. We call these the "data" portions. The rest of the Autoconf
# source text consists of comments plus executable code that decides which
# of the data portions to output in any given case. We call these
# comments and executable code the "non-data" portions. Autoconf never
# copies any of the non-data portions into its output.
#
# This special exception to the GPL applies to versions of Autoconf
# released by the Free Software Foundation. When you make and
# distribute a modified version of Autoconf, you may extend this special
# exception to the GPL to apply to your modified version as well, *unless*
# your modified version has the potential to copy into its output some
# of the text that was the non-data portion of the version that you started
# with. (In other words, unless your change moves or copies text from
# the non-data portions to the data portions.) If your modification has
# such potential, you must delete any notice of this special exception
# to the GPL from your modified version.
#
# Written by Akim Demaille, Pavel Roskin, Alexandre Oliva, Lars J. Aas
# and many other people.
# We heavily use m4's diversions both for the initializations and for
# required macros, because in both cases we have to issue soon in
# output something which is discovered late.
#
#
# KILL is only used to suppress output.
#
# - BINSH
# AC_REQUIRE'd #! /bin/sh line
# - HEADER-REVISION
# RCS keywords etc.
# - HEADER-COMMENT
# Purpose of the script etc.
# - HEADER-COPYRIGHT
# Copyright notice(s)
# - M4SH-INIT
# M4sh's initializations
#
# - BODY
# The body of the script.
# _m4_divert(DIVERSION-NAME)
# --------------------------
# Convert a diversion name into its number. Otherwise, return
# DIVERSION-NAME which is supposed to be an actual diversion number.
# Of course it would be nicer to use m4_case here, instead of zillions
# of little macros, but it then takes twice longer to run `autoconf'!
m4_define([_m4_divert(BINSH)], 0)
m4_define([_m4_divert(HEADER-REVISION)], 1)
m4_define([_m4_divert(HEADER-COMMENT)], 2)
m4_define([_m4_divert(HEADER-COPYRIGHT)], 3)
m4_define([_m4_divert(M4SH-INIT)], 4)
m4_define([_m4_divert(BODY)], 1000)
# Aaarg. Yet it starts with compatibility issues... Libtool wants to
# use NOTICE to insert its own LIBTOOL-INIT stuff. People should ask
# before diving into our internals :(
m4_copy([_m4_divert(M4SH-INIT)], [_m4_divert(NOTICE)])
## ------------------------- ##
## 1. Sanitizing the shell. ##
## ------------------------- ##
# AS_REQUIRE(NAME-TO-CHECK, [BODY-TO-EXPAND = NAME-TO-CHECK])
# -----------------------------------------------------------
# BODY-TO-EXPAND is some initialization which must be expanded in the
# M4SH-INIT section when expanded (required or not). For instance:
#
# m4_defun([_FOO_PREPARE], [foo=foo])
# m4_defun([FOO],
# [m4_require([_FOO_PREPARE])dnl
# echo $foo])
#
# m4_defun([_BAR_PREPARE], [bar=bar])
# m4_defun([BAR],
# [AS_REQUIRE([_BAR_PREPARE])dnl
# echo $bar])
#
# AS_INIT
# foo1=`FOO`
# foo2=`FOO`
# bar1=`BAR`
# bar2=`BAR`
#
# gives
#
# #! /bin/sh
# bar=bar
#
# foo1=`foo=foo
# echo $foo`
# foo2=`echo $foo`
# bar1=`echo $bar`
# bar2=`echo $bar`
#
m4_define([AS_REQUIRE],
[m4_provide_if([$1], [],
[m4_divert_text([M4SH-INIT], [$1])])])
# AS_SHELL_SANITIZE
# -----------------
# Try to be as Bourne and/or POSIX as possible.
m4_defun([AS_SHELL_SANITIZE],
[
## --------------------- ##
## M4sh Initialization. ##
## --------------------- ##
# Be Bourne compatible
if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
emulate sh
NULLCMD=:
elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then
set -o posix
fi
# Name of the executable.
as_me=`AS_BASENAME($[0])`
# Rewrite early, but we need PATH_SEPARATOR.
_AS_PATH_SEPARATOR_PREPARE
_AS_LINENO_PREPARE
_AS_CR_PREPARE
_AS_ECHO_N_PREPARE
_AS_EXPR_PREPARE
_AS_LN_S_PREPARE
_AS_TEST_PREPARE
_AS_TR_CPP_PREPARE
_AS_TR_SH_PREPARE
_AS_UNSET_PREPARE
# NLS nuisances.
AS_UNSET([LANG], [C])
AS_UNSET([LC_ALL], [C])
AS_UNSET([LC_TIME], [C])
AS_UNSET([LC_CTYPE], [C])
AS_UNSET([LANGUAGE], [C])
AS_UNSET([LC_COLLATE], [C])
AS_UNSET([LC_NUMERIC], [C])
AS_UNSET([LC_MESSAGES], [C])
# IFS
# We need space, tab and new line, in precisely that order.
as_nl='
'
IFS=" $as_nl"
# CDPATH.
AS_UNSET([CDPATH], [$PATH_SEPARATOR])
])
## ----------------------------- ##
## 2. Wrappers around builtins. ##
## ----------------------------- ##
# This section is lexicographically sorted.
# AS_EXIT([EXIT-CODE = 1])
# ------------------------
# Exit and set exit code to EXIT-CODE in the way that it's seen
# within "trap 0".
#
# We cannot simply use "exit N" because some shells (zsh and Solaris sh)
# will not set $? to N while running the code set by "trap 0"
# So we set $? by executing "exit N" in the subshell and then exit.
# Other shells don't use `$?' as default for `exit', hence just repeating
# the exit value can only help improving portability.
m4_define([AS_EXIT],
[{ (exit m4_default([$1], 1)); exit m4_default([$1], 1); }])
# AS_IF(TEST, [IF-TRUE], [IF-FALSE])
# ----------------------------------
# Expand into
# | if TEST; then
# | IF-TRUE
# | else
# | IF-FALSE
# | fi
# with simplifications is IF-TRUE and/or IF-FALSE is empty.
#
# FIXME: Be n-ary, just as m4_if.
m4_define([AS_IF],
[m4_ifval([$2$3],
[if $1; then
m4_ifval([$2], [$2], :)
m4_ifvaln([$3],
[else
$3])dnl
fi
])dnl
])# AS_IF
# _AS_UNSET_PREPARE
# -----------------
# AS_UNSET depends upon $as_unset: compute it.
m4_defun([_AS_UNSET_PREPARE],
[# Support unset when possible.
if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
as_unset=unset
else
as_unset=false
fi
])
# AS_UNSET(VAR, [VALUE-IF-UNSET-NOT-SUPPORTED = `'])
# --------------------------------------------------
# Try to unset the env VAR, otherwise set it to
# VALUE-IF-UNSET-NOT-SUPPORTED. `as_unset' must have been computed.
m4_defun([AS_UNSET],
[AS_REQUIRE([_AS_UNSET_PREPARE])dnl
$as_unset $1 || test "${$1+set}" != set || { $1=$2; export $1; }])
## ------------------------------------------ ##
## 3. Error and warnings at the shell level. ##
## ------------------------------------------ ##
# If AS_MESSAGE_LOG_FD is defined, shell messages are duplicated there
# too.
# AS_ESCAPE(STRING, [CHARS = $"'\])
# ---------------------------------
# Escape the CHARS in STRING.
m4_define([AS_ESCAPE],
[m4_patsubst([$1],
m4_ifval([$2], [[\([$2]\)]], [[\([\"$`]\)]]),
[\\\1])])
# _AS_QUOTE_IFELSE(STRING, IF-MODERN-QUOTATION, IF-OLD-QUOTATION)
# ---------------------------------------------------------------
# Compatibility glue between the old AS_MSG suite which did not
# quote anything, and the modern suite which quotes the quotes.
# If STRING contains `\\' or `\$', it's modern.
# If STRING contains `\"' or `\`', it's old.
# Otherwise it's modern.
# We use two quotes in the pattern to keep highlighting tools at peace.
m4_define([_AS_QUOTE_IFELSE],
[m4_match([$1],
[\\[\\$]], [$2],
[\\[`""]], [$3],
[$2])])
# _AS_ECHO_UNQUOTED(STRING, [FD = AS_MESSAGE_FD])
# -----------------------------------------------
# Perform shell expansions on STRING and echo the string to FD.
m4_define([_AS_ECHO_UNQUOTED],
[echo "$1" >&m4_default([$2], [AS_MESSAGE_FD])])
# _AS_QUOTE(STRING)
# -----------------
# If there are quoted (via backslash) backquotes do nothing, else
# backslash all the quotes.
# FIXME: In a distant future (2.51 or +), this warning should be
# classified as `syntax'. It is classified as `obsolete' to ease
# the transition (for Libtool for instance).
m4_define([_AS_QUOTE],
[_AS_QUOTE_IFELSE([$1],
[AS_ESCAPE([$1], [`""])],
[m4_warn([obsolete],
[back quotes and double quotes should not be escaped in: $1])dnl
$1])])
# _AS_ECHO(STRING, [FD = AS_MESSAGE_FD])
# --------------------------------------
# Protect STRING from backquote expansion, echo the result to FD.
m4_define([_AS_ECHO],
[_AS_ECHO_UNQUOTED([_AS_QUOTE([$1])], [$2])])
# _AS_ECHO_N_PREPARE
# ------------------
# Check whether to use -n, \c, or newline-tab to separate
# checking messages from result messages.
# Don't try to cache, since the results of this macro are needed to
# display the checking message. In addition, caching something used once
# has little interest.
# Idea borrowed from dist 3.0. Use `*c*,', not `*c,' because if `\c'
# failed there is also a new-line to match.
m4_define([_AS_ECHO_N_PREPARE],
[case `echo "testing\c"; echo 1,2,3`,`echo -n testing; echo 1,2,3` in
*c*,-n*) ECHO_N= ECHO_C='
' ECHO_T=' ' ;;
*c*,* ) ECHO_N=-n ECHO_C= ECHO_T= ;;
*) ECHO_N= ECHO_C='\c' ECHO_T= ;;
esac
])# _AS_ECHO_N_PREPARE
# _AS_ECHO_N(STRING, [FD = AS_MESSAGE_FD])
# ----------------------------------------
# Same as _AS_ECHO, but echo doesn't return to a new line.
m4_define([_AS_ECHO_N],
[echo $ECHO_N "_AS_QUOTE([$1])$ECHO_C" >&m4_default([$2],
[AS_MESSAGE_FD])])
# AS_MESSAGE(STRING, [FD = AS_MESSAGE_FD])
# ----------------------------------------
m4_define([AS_MESSAGE],
[m4_ifset([AS_MESSAGE_LOG_FD],
[{ _AS_ECHO([$as_me:$LINENO: $1], [AS_MESSAGE_LOG_FD])
_AS_ECHO([$as_me: $1], [$2]);}],
[_AS_ECHO([$as_me: $1], [$2])])[]dnl
])
# AS_WARN(PROBLEM)
# ----------------
m4_define([AS_WARN],
[AS_MESSAGE([WARNING: $1], [2])])# AS_WARN
# AS_ERROR(ERROR, [EXIT-STATUS = 1])
# ----------------------------------
m4_define([AS_ERROR],
[{ AS_MESSAGE([error: $1], [2])
AS_EXIT([$2]); }[]dnl
])# AS_ERROR
## -------------------------------------- ##
## 4. Portable versions of common tools. ##
## -------------------------------------- ##
# This section is lexicographically sorted.
# AS_DIRNAME(PATHNAME)
# --------------------
# Simulate running `dirname(1)' on PATHNAME, not all systems have it.
# This macro must be usable from inside ` `.
#
# Prefer expr to echo|sed, since expr is usually faster and it handles
# backslashes and newlines correctly. However, older expr
# implementations (e.g. SunOS 4 expr and Solaris 8 /usr/ucb/expr) have
# a silly length limit that causes expr to fail if the matched
# substring is longer than 120 bytes. So fall back on echo|sed if
# expr fails.
m4_defun([AS_DIRNAME_EXPR],
[AS_REQUIRE([_AS_EXPR_PREPARE])dnl
$as_expr X[]$1 : 'X\(.*[[^/]]\)//*[[^/][^/]]*/*$' \| \
X[]$1 : 'X\(//\)[[^/]]' \| \
X[]$1 : 'X\(//\)$' \| \
X[]$1 : 'X\(/\)' \| \
. : '\(.\)'])
m4_defun([AS_DIRNAME_SED],
[echo X[]$1 |
sed ['/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
/^X\(\/\/\)[^/].*/{ s//\1/; q; }
/^X\(\/\/\)$/{ s//\1/; q; }
/^X\(\/\).*/{ s//\1/; q; }
s/.*/./; q']])
m4_defun([AS_DIRNAME],
[AS_DIRNAME_EXPR([$1]) 2>/dev/null ||
AS_DIRNAME_SED([$1])])
# AS_BASENAME(PATHNAME)
# --------------------
# Simulate running `basename(1)' on PATHNAME, not all systems have it.
# This macro must be usable from inside ` `.
m4_defun([AS_BASENAME_SED],
[echo "$1" |sed 's,\(.*[[\\/]]\+\)\?\([[^\\/]]\+\)[[\\/]]*,\2,'])
m4_defun([AS_BASENAME],
[AS_BASENAME_SED([$1])])
# AS_EXECUTABLE_P
# ---------------
# Check whether a file is executable.
m4_defun([AS_EXECUTABLE_P],
[AS_REQUIRE([_AS_TEST_PREPARE])dnl
$as_executable_p $1[]dnl
])# AS_EXECUTABLE_P
# _AS_EXPR_PREPARE
# ----------------
# Some expr work properly (i.e. compute and issue the right result),
# but exit with failure. When a fall back to expr (as in AS_DIRNAME)
# is provided, you get twice the result. Prevent this.
m4_defun([_AS_EXPR_PREPARE],
[if expr a : '\(a\)' >/dev/null 2>&1; then
as_expr=expr
else
as_expr=false
fi
])# _AS_EXPR_PREPARE
# _AS_LINENO_PREPARE
# ------------------
# If LINENO is not supported by the shell, produce a version of this
# script where LINENO is hard coded. Rewrite if not up to date only.
# Comparing LINENO against _oline_ is not a good solution, since in
# the case of embedded executables (such as config.status within
# configure) you'd compare LINENO wrt config.status vs. _oline_ vs
# configure. Hence a useless rewrite (not to mention the risk of
# ``infinite'' rewrites. Merely check that LINENO is incremented
# between two lines, which is a property guaranteed for _oline_, hence
# it protects us from repetitive rewrites. Be sure to have a test
# that does detect non LINENO support...
m4_define([_AS_LINENO_PREPARE],
[as_command='
as_lineno_1=$LINENO
as_lineno_2=$LINENO
as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
test "x$as_lineno_1" != "x$as_lineno_2" &&
test "x$as_lineno_3" = "x$as_lineno_2"
'
if eval "$as_command"; then
:
else
# Find who we are. Look in the path if we contain no path at all
# relative or not.
case $[0] in
*[[\\/]]* ) as_myself=$[0] ;;
*) _AS_PATH_WALK([],
[test -r "$as_dir/$[0]" && as_myself=$as_dir/$[0] && break])
;;
esac
# We did not find ourselves, most probably we were run as `sh COMMAND'
# in which case we are not to be found in the path.
if test "x$as_myself" = x; then
as_myself=$[0]
fi
if test ! -f "$as_myself"; then
AS_ERROR([cannot find myself; rerun with an absolute path])
fi
case $CONFIG_SHELL in
'')
_AS_PATH_WALK([/bin:/usr/bin:$PATH],
[for as_base in sh bash ksh sh5; do
case $as_dir in
/*)
if ("$as_dir/$as_base" -c "$as_command") 2>/dev/null; then
CONFIG_SHELL=$as_dir/$as_base
export CONFIG_SHELL
exec "$CONFIG_SHELL" "$[0]" ${1+"$[@]"}
fi;;
esac
done]);;
esac
if test ! -f "$as_me.lineno" ||
test x`ls -1dt "$as_me.lineno" "$as_myself" 2>/dev/null | sed 1q` \
!= x"$as_me.lineno"; then
# Be sure to write the pattern so that it doesn't replace itself:
# it must not match itself.
awk <$as_myself '
/[[$]]LINENO/ { printf "%d:", NR }
{ print }
' |
sed ['/[$]LINENO/s/^\([0-9][0-9]*\):\(.*\)[$]LINENO/\2\1/'] \
>$as_me.lineno
chmod +x $as_me.lineno
fi
# Don't try to exec as it changes $[0], causing all sort of problems
# (the dirname of $[0] is not the place where we might find the
# original and so on. Autoconf is especially sensible to this).
. ./$as_me.lineno
# Exit status is that of the last command.
exit
fi
])# _AS_LINENO_PREPARE
# _AS_LN_S_PREPARE
# ----------------
# Don't use conftest.sym to avoid filename issues on DJGPP, where this
# would yield conftest.sym.exe for DJGPP < 2.04. And don't use `conftest'
# as base name to avoid prohibiting concurrency (e.g., concurrent
# config.statuses).
m4_defun([_AS_LN_S_PREPARE],
[rm -f conf$$ conf$$.exe conf$$.file
echo >conf$$.file
if ln -s conf$$.file conf$$ 2>/dev/null; then
# We could just check for DJGPP; but this test a) works b) is more generic
# and c) will remain valid once DJGPP supports symlinks (DJGPP 2.04).
if test -f conf$$.exe; then
# Don't use ln at all; we don't have any links
as_ln_s='cp -p'
else
as_ln_s='ln -s'
fi
elif ln conf$$.file conf$$ 2>/dev/null; then
as_ln_s=ln
else
as_ln_s='cp -p'
fi
rm -f conf$$ conf$$.exe conf$$.file
])# _AS_LN_S_PREPARE
# _AS_PATH_SEPARATOR_PREPARE
# --------------------------
# Compute the path separator.
m4_defun([_AS_PATH_SEPARATOR_PREPARE],
[# The user is always right.
if test "${PATH_SEPARATOR+set}" != set; then
echo "#! $SHELL" >conftest.sh
echo "exit 0" >>conftest.sh
chmod +x conftest.sh
if (PATH=".;."; conftest.sh) >/dev/null 2>&1; then
PATH_SEPARATOR=';'
else
PATH_SEPARATOR=:
fi
rm -f conftest.sh
fi
])# _AS_PATH_SEPARATOR_PREPARE
# _AS_PATH_WALK([PATH = $PATH], BODY)
# -----------------------------------
# Walk through PATH running BODY for each `as_dir'.
#
# Still very private as its interface looks quite bad.
#
# `$as_dummy' forces splitting on constant user-supplied paths.
# POSIX.2 word splitting is done only on the output of word
# expansions, not every word. This closes a longstanding sh security
# hole. Optimize it away when not needed.
m4_define([_AS_PATH_WALK],
[AS_REQUIRE([_AS_PATH_SEPARATOR_PREPARE])dnl
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
AS_LITERAL_IF([m4_default([$1], [$PATH])],
[as_dummy="$1"
for as_dir in $as_dummy],
[for as_dir in m4_default([$1], [$PATH])])
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
$2
done
])
# AS_LN_S(FILE, LINK)
# -------------------
# FIXME: Should we add the glue code to handle properly relative symlinks
# simulated with `ln' or `cp'?
m4_defun([AS_LN_S],
[AS_REQUIRE([_AS_LN_S_PREPARE])dnl
$as_ln_s $1 $2
])
# AS_MKDIR_P(PATH)
# ----------------
# Emulate `mkdir -p' with plain `mkdir'.
#
# Don't set IFS to '\\/' (see the doc): you would end up with
# directories called foo\bar and foo?az and others depending upon the
# shell.
m4_define([AS_MKDIR_P],
[{ case $1 in
[[\\/]]* | ?:[[\\/]]* ) as_incr_dir=;;
*) as_incr_dir=.;;
esac
as_dummy=$1
for as_mkdir_dir in `IFS='/\\'; set X $as_dummy; shift; echo "$[@]"`; do
case $as_mkdir_dir in
# Skip DOS drivespec
?:) as_incr_dir=$as_mkdir_dir ;;
*)
as_incr_dir=$as_incr_dir/$as_mkdir_dir
test -d "$as_incr_dir" ||
mkdir "$as_incr_dir" ||
AS_ERROR([cannot create $1])
;;
esac
done; }
])# AS_MKDIR_P
# _AS_BROKEN_TEST_PREPARE
# -----------------------
# FIXME: This does not work and breaks way too many things.
#
# Find out ahead of time whether we want test -x (preferred) or test -f
# to check whether a file is executable.
m4_defun([_AS_BROKEN_TEST_PREPARE],
[# Find out how to test for executable files. Don't use a zero-byte file,
# as systems may use methods other than mode bits to determine executability.
cat >conf$$.file <<_ASEOF
@%:@! /bin/sh
exit 0
_ASEOF
chmod +x conf$$.file
if test -x conf$$.file >/dev/null 2>&1; then
as_executable_p="test -x"
elif test -f conf$$.file >/dev/null 2>&1; then
as_executable_p="test -f"
else
AS_ERROR([cannot check whether a file is executable on this system])
fi
rm -f conf$$.file
])# _AS_BROKEN_TEST_PREPARE
# _AS_TEST_PREPARE
# ----------------
m4_defun([_AS_TEST_PREPARE],
[as_executable_p="test -f"
])# _AS_BROKEN_TEST_PREPARE
## ------------------ ##
## 5. Common idioms. ##
## ------------------ ##
# This section is lexicographically sorted.
# AS_BOX(MESSAGE, [FRAME-CHARACTER = `-'])
# ----------------------------------------
# Output MESSAGE, a single line text, framed with FRAME-CHARACTER (which
# must not be `/').
m4_define([AS_BOX],
[AS_LITERAL_IF([$1],
[_AS_BOX_LITERAL($@)],
[_AS_BOX_INDIR($@)])])
# _AS_BOX_LITERAL(MESSAGE, [FRAME-CHARACTER = `-'])
# -------------------------------------------------
m4_define([_AS_BOX_LITERAL],
[cat <<\_ASBOX
m4_text_box($@)
_ASBOX])
# _AS_BOX_INDIR(MESSAGE, [FRAME-CHARACTER = `-'])
# -----------------------------------------------
m4_define([_AS_BOX_INDIR],
[sed 'h;s/./m4_default([$2], [-])/g;s/^.../@%:@@%:@ /;s/...$/ @%:@@%:@/;p;x;p;x' <<_ASBOX
@%:@@%:@ $1 @%:@@%:@
_ASBOX])
# AS_LITERAL_IF(EXPRESSION, IF-LITERAL, IF-NOT-LITERAL)
# -----------------------------------------------------
# If EXPRESSION has shell indirections ($var or `expr`), expand
# IF-INDIR, else IF-NOT-INDIR.
# This is an *approximation*: for instance EXPRESSION = `\$' is
# definitely a literal, but will not be recognized as such.
m4_define([AS_LITERAL_IF],
[m4_match([$1], [[`$]],
[$3], [$2])])
# AS_TMPDIR(PREFIX)
# -----------------
# Create as safely as possible a temporary directory which name is
# inspired by PREFIX (should be 2-4 chars max), and set trap
# mechanisms to remove it.
m4_define([AS_TMPDIR],
[# Create a temporary directory, and hook for its removal unless debugging.
$debug ||
{
trap 'exit_status=$?; rm -rf $tmp && exit $exit_status' 0
trap 'AS_EXIT([1])' 1 2 13 15
}
# Create a (secure) tmp directory for tmp files.
: ${TMPDIR=/tmp}
{
tmp=`(umask 077 && mktemp -d -q "$TMPDIR/$1XXXXXX") 2>/dev/null` &&
test -n "$tmp" && test -d "$tmp"
} ||
{
tmp=$TMPDIR/$1$$-$RANDOM
(umask 077 && mkdir $tmp)
} ||
{
echo "$me: cannot create a temporary directory in $TMPDIR" >&2
AS_EXIT
}dnl
])# AS_TMPDIR
# AS_UNAME
# --------
# Try to describe this machine. Meant for logs.
m4_define([AS_UNAME],
[{
cat <<_ASUNAME
m4_text_box([Platform.])
hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
uname -m = `(uname -m) 2>/dev/null || echo unknown`
uname -r = `(uname -r) 2>/dev/null || echo unknown`
uname -s = `(uname -s) 2>/dev/null || echo unknown`
uname -v = `(uname -v) 2>/dev/null || echo unknown`
/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
/bin/uname -X = `(/bin/uname -X) 2>/dev/null || echo unknown`
/bin/arch = `(/bin/arch) 2>/dev/null || echo unknown`
/usr/bin/arch -k = `(/usr/bin/arch -k) 2>/dev/null || echo unknown`
/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
hostinfo = `(hostinfo) 2>/dev/null || echo unknown`
/bin/machine = `(/bin/machine) 2>/dev/null || echo unknown`
/usr/bin/oslevel = `(/usr/bin/oslevel) 2>/dev/null || echo unknown`
/bin/universe = `(/bin/universe) 2>/dev/null || echo unknown`
_ASUNAME
_AS_PATH_WALK([$PATH], [echo "PATH: $as_dir"])
}])
## ------------------------------------ ##
## Common m4/sh character translation. ##
## ------------------------------------ ##
# The point of this section is to provide high level macros comparable
# to m4's `translit' primitive, but m4/sh polymorphic.
# Transliteration of literal strings should be handled by m4, while
# shell variables' content will be translated at runtime (tr or sed).
# _AS_CR_PREPARE
# --------------
# Output variables defining common character ranges.
# See m4_cr_letters etc.
m4_defun([_AS_CR_PREPARE],
[# Avoid depending upon Character Ranges.
as_cr_letters='abcdefghijklmnopqrstuvwxyz'
as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
as_cr_Letters=$as_cr_letters$as_cr_LETTERS
as_cr_digits='0123456789'
as_cr_alnum=$as_cr_Letters$as_cr_digits
])
# _AS_TR_SH_PREPARE
# -----------------
m4_defun([_AS_TR_SH_PREPARE],
[AS_REQUIRE([_AS_CR_PREPARE])dnl
# Sed expression to map a string onto a valid variable name.
as_tr_sh="sed y%*+%pp%;s%[[^_$as_cr_alnum]]%_%g"
])
# AS_TR_SH(EXPRESSION)
# --------------------
# Transform EXPRESSION into a valid shell variable name.
# sh/m4 polymorphic.
# Be sure to update the definition of `$as_tr_sh' if you change this.
m4_defun([AS_TR_SH],
[AS_REQUIRE([_$0_PREPARE])dnl
AS_LITERAL_IF([$1],
[m4_patsubst(m4_translit([[$1]], [*+], [pp]),
[[^a-zA-Z0-9_]], [_])],
[`echo "$1" | $as_tr_sh`])])
# _AS_TR_CPP_PREPARE
# ------------------
m4_defun([_AS_TR_CPP_PREPARE],
[AS_REQUIRE([_AS_CR_PREPARE])dnl
# Sed expression to map a string onto a valid CPP name.
as_tr_cpp="sed y%*$as_cr_letters%P$as_cr_LETTERS%;s%[[^_$as_cr_alnum]]%_%g"
])
# AS_TR_CPP(EXPRESSION)
# ---------------------
# Map EXPRESSION to an upper case string which is valid as rhs for a
# `#define'. sh/m4 polymorphic. Be sure to update the definition
# of `$as_tr_cpp' if you change this.
m4_defun([AS_TR_CPP],
[AS_REQUIRE([_$0_PREPARE])dnl
AS_LITERAL_IF([$1],
[m4_patsubst(m4_translit([[$1]],
[*abcdefghijklmnopqrstuvwxyz],
[PABCDEFGHIJKLMNOPQRSTUVWXYZ]),
[[^A-Z0-9_]], [_])],
[`echo "$1" | $as_tr_cpp`])])
# _AS_TR_PREPARE
# --------------
m4_defun([_AS_TR_PREPARE],
[AS_REQUIRE([_AS_TR_SH_PREPARE])dnl
AS_REQUIRE([_AS_TR_CPP_PREPARE])dnl
])
## --------------------------------------------------- ##
## Common m4/sh handling of variables (indirections). ##
## --------------------------------------------------- ##
# The purpose of this section is to provide a uniform API for
# reading/setting sh variables with or without indirection.
# Typically, one can write
# AS_VAR_SET(var, val)
# or
# AS_VAR_SET(as_$var, val)
# and expect the right thing to happen.
# AS_VAR_SET(VARIABLE, VALUE)
# ---------------------------
# Set the VALUE of the shell VARIABLE.
# If the variable contains indirections (e.g. `ac_cv_func_$ac_func')
# perform whenever possible at m4 level, otherwise sh level.
m4_define([AS_VAR_SET],
[AS_LITERAL_IF([$1],
[$1=$2],
[eval "$1=$2"])])
# AS_VAR_GET(VARIABLE)
# --------------------
# Get the value of the shell VARIABLE.
# Evaluates to $VARIABLE if there are no indirection in VARIABLE,
# else into the appropriate `eval' sequence.
m4_define([AS_VAR_GET],
[AS_LITERAL_IF([$1],
[$$1],
[`eval echo '${'m4_patsubst($1, [[\\`]], [\\\&])'}'`])])
# AS_VAR_TEST_SET(VARIABLE)
# -------------------------
# Expands into the `test' expression which is true if VARIABLE
# is set. Polymorphic. Should be dnl'ed.
m4_define([AS_VAR_TEST_SET],
[AS_LITERAL_IF([$1],
[test "${$1+set}" = set],
[eval "test \"\${$1+set}\" = set"])])
# AS_VAR_SET_IF(VARIABLE, IF-TRUE, IF-FALSE)
# ------------------------------------------
# Implement a shell `if-then-else' depending whether VARIABLE is set
# or not. Polymorphic.
m4_define([AS_VAR_SET_IF],
[AS_IF([AS_VAR_TEST_SET([$1])], [$2], [$3])])
# AS_VAR_PUSHDEF and AS_VAR_POPDEF
# --------------------------------
#
# Sometimes we may have to handle literals (e.g. `stdlib.h'), while at
# other moments, the same code may have to get the value from a
# variable (e.g., `ac_header'). To have a uniform handling of both
# cases, when a new value is about to be processed, declare a local
# variable, e.g.:
#
# AS_VAR_PUSHDEF([header], [ac_cv_header_$1])
#
# and then in the body of the macro, use `header' as is. It is of
# first importance to use `AS_VAR_*' to access this variable. Don't
# quote its name: it must be used right away by m4.
#
# If the value `$1' was a literal (e.g. `stdlib.h'), then `header' is
# in fact the value `ac_cv_header_stdlib_h'. If `$1' was indirect,
# then `header's value in m4 is in fact `$ac_header', the shell
# variable that holds all of the magic to get the expansion right.
#
# At the end of the block, free the variable with
#
# AS_VAR_POPDEF([header])
# AS_VAR_PUSHDEF(VARNAME, VALUE)
# ------------------------------
# Define the m4 macro VARNAME to an accessor to the shell variable
# named VALUE. VALUE does not need to be a valid shell variable name:
# the transliteration is handled here. To be dnl'ed.
m4_define([AS_VAR_PUSHDEF],
[AS_LITERAL_IF([$2],
[m4_pushdef([$1], [AS_TR_SH($2)])],
[as_$1=AS_TR_SH($2)
m4_pushdef([$1], [$as_[$1]])])])
# AS_VAR_POPDEF(VARNAME)
# ----------------------
# Free the shell variable accessor VARNAME. To be dnl'ed.
m4_define([AS_VAR_POPDEF],
[m4_popdef([$1])])
## ----------------- ##
## Setting M4sh up. ##
## ----------------- ##
# AS_INIT
# -------
m4_define([AS_INIT],
[m4_init
# Forbidden tokens and exceptions.
m4_pattern_forbid([^_?AS_])
# Bangshe.
m4_divert_text([BINSH], [@%:@! /bin/sh])
# Let's go!
m4_wrap([m4_divert_pop([BODY])[]])
m4_divert_push([BODY])[]dnl
])
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