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getopt.m4
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# getopt.m4 serial 35
dnl Copyright (C) 2002-2006, 2008-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Request a POSIX compliant getopt function.
AC_DEFUN([gl_FUNC_GETOPT_POSIX],
[
m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
dnl Other modules can request the gnulib implementation of the getopt
dnl functions unconditionally, by defining gl_REPLACE_GETOPT_ALWAYS.
dnl argp.m4 does this.
m4_ifdef([gl_REPLACE_GETOPT_ALWAYS], [
gl_GETOPT_IFELSE([], [])
REPLACE_GETOPT=1
], [
REPLACE_GETOPT=0
gl_GETOPT_IFELSE([
REPLACE_GETOPT=1
],
[])
])
if test $REPLACE_GETOPT = 1; then
dnl Arrange for getopt.h to be created.
gl_GETOPT_SUBSTITUTE_HEADER
dnl Arrange for unistd.h to include getopt.h.
GNULIB_UNISTD_H_GETOPT=1
fi
])
# Request a POSIX compliant getopt function with GNU extensions (such as
# options with optional arguments) and the functions getopt_long,
# getopt_long_only.
AC_DEFUN([gl_FUNC_GETOPT_GNU],
[
m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
AC_REQUIRE([gl_FUNC_GETOPT_POSIX])
])
# emacs' configure.in uses this.
AC_DEFUN([gl_GETOPT_IFELSE],
[
AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
AS_IF([test -n "$gl_replace_getopt"], [$1], [$2])
])
# Determine whether to replace the entire getopt facility.
AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
[
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_REQUIRE([AC_PROG_AWK]) dnl for awk that supports ENVIRON
dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
gl_CHECK_NEXT_HEADERS([getopt.h])
if test $ac_cv_header_getopt_h = yes; then
HAVE_GETOPT_H=1
else
HAVE_GETOPT_H=0
fi
AC_SUBST([HAVE_GETOPT_H])
gl_replace_getopt=
dnl Test whether <getopt.h> is available.
if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
fi
dnl Test whether the function getopt_long is available.
if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
fi
dnl mingw's getopt (in libmingwex.a) does weird things when the options
dnl strings starts with '+' and it's not the first call. Some internal state
dnl is left over from earlier calls, and neither setting optind = 0 nor
dnl setting optreset = 1 get rid of this internal state.
dnl POSIX is silent on optind vs. optreset, so we allow either behavior.
dnl POSIX 2008 does not specify leading '+' behavior, but see
dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on
dnl the next version of POSIX. For now, we only guarantee leading '+'
dnl behavior with getopt-gnu.
if test -z "$gl_replace_getopt"; then
AC_CACHE_CHECK([whether getopt is POSIX compatible],
[gl_cv_func_getopt_posix],
[
dnl BSD getopt_long uses an incompatible method to reset
dnl option processing. Existence of the variable, in and of
dnl itself, is not a reason to replace getopt, but knowledge
dnl of the variable is needed to determine how to reset and
dnl whether a reset reparses the environment. Solaris
dnl supports neither optreset nor optind=0, but keeps no state
dnl that needs a reset beyond setting optind=1; detect Solaris
dnl by getopt_clip.
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <unistd.h>]],
[[int *p = &optreset; return optreset;]])],
[gl_optind_min=1],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <getopt.h>]],
[[return !getopt_clip;]])],
[gl_optind_min=1],
[gl_optind_min=0])])
dnl This test fails on mingw and succeeds on many other platforms.
gl_save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS -DOPTIND_MIN=$gl_optind_min"
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
int
main ()
{
{
int argc = 0;
char *argv[10];
int c;
argv[argc++] = "program";
argv[argc++] = "-a";
argv[argc++] = "foo";
argv[argc++] = "bar";
argv[argc] = NULL;
optind = OPTIND_MIN;
opterr = 0;
c = getopt (argc, argv, "ab");
if (!(c == 'a'))
return 1;
c = getopt (argc, argv, "ab");
if (!(c == -1))
return 2;
if (!(optind == 2))
return 3;
}
/* Some internal state exists at this point. */
{
int argc = 0;
char *argv[10];
int c;
argv[argc++] = "program";
argv[argc++] = "donald";
argv[argc++] = "-p";
argv[argc++] = "billy";
argv[argc++] = "duck";
argv[argc++] = "-a";
argv[argc++] = "bar";
argv[argc] = NULL;
optind = OPTIND_MIN;
opterr = 0;
c = getopt (argc, argv, "+abp:q:");
if (!(c == -1))
return 4;
if (!(strcmp (argv[0], "program") == 0))
return 5;
if (!(strcmp (argv[1], "donald") == 0))
return 6;
if (!(strcmp (argv[2], "-p") == 0))
return 7;
if (!(strcmp (argv[3], "billy") == 0))
return 8;
if (!(strcmp (argv[4], "duck") == 0))
return 9;
if (!(strcmp (argv[5], "-a") == 0))
return 10;
if (!(strcmp (argv[6], "bar") == 0))
return 11;
if (!(optind == 1))
return 12;
}
/* Detect MacOS 10.5, AIX 7.1 bug. */
{
char *argv[3] = { "program", "-ab", NULL };
optind = OPTIND_MIN;
opterr = 0;
if (getopt (2, argv, "ab:") != 'a')
return 13;
if (getopt (2, argv, "ab:") != '?')
return 14;
if (optopt != 'b')
return 15;
if (optind != 2)
return 16;
}
return 0;
}
]])],
[gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
[case "$host_os" in
mingw*) gl_cv_func_getopt_posix="guessing no";;
darwin* | aix*) gl_cv_func_getopt_posix="guessing no";;
*) gl_cv_func_getopt_posix="guessing yes";;
esac
])
CPPFLAGS=$gl_save_CPPFLAGS
])
case "$gl_cv_func_getopt_posix" in
*no) gl_replace_getopt=yes ;;
esac
fi
if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
[# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
# optstring is necessary for programs like m4 that have POSIX-mandated
# semantics for supporting options interspersed with files.
# Also, since getopt_long is a GNU extension, we require optind=0.
# Bash ties 'set -o posix' to a non-exported POSIXLY_CORRECT;
# so take care to revert to the correct (non-)export state.
dnl GNU Coding Standards currently allow awk but not env; besides, env
dnl is ambiguous with environment values that contain newlines.
gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
xx) gl_had_POSIXLY_CORRECT=exported ;;
x) gl_had_POSIXLY_CORRECT=yes ;;
*) gl_had_POSIXLY_CORRECT= ;;
esac
POSIXLY_CORRECT=1
export POSIXLY_CORRECT
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[#include <getopt.h>
#include <stddef.h>
#include <string.h>
]], [[
int result = 0;
/* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
OSF/1 5.1, Solaris 10. */
{
char *myargv[3];
myargv[0] = "conftest";
myargv[1] = "-+";
myargv[2] = 0;
opterr = 0;
if (getopt (2, myargv, "+a") != '?')
result |= 1;
}
/* This code succeeds on glibc 2.8, mingw,
and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x. */
{
char *argv[] = { "program", "-p", "foo", "bar", NULL };
optind = 1;
if (getopt (4, argv, "p::") != 'p')
result |= 2;
else if (optarg != NULL)
result |= 4;
else if (getopt (4, argv, "p::") != -1)
result |= 6;
else if (optind != 2)
result |= 8;
}
/* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */
{
char *argv[] = { "program", "foo", "-p", NULL };
optind = 0;
if (getopt (3, argv, "-p") != 1)
result |= 16;
else if (getopt (3, argv, "-p") != 'p')
result |= 32;
}
/* This code fails on glibc 2.11. */
{
char *argv[] = { "program", "-b", "-a", NULL };
optind = opterr = 0;
if (getopt (3, argv, "+:a:b") != 'b')
result |= 64;
else if (getopt (3, argv, "+:a:b") != ':')
result |= 64;
}
return result;
]])],
[gl_cv_func_getopt_gnu=yes],
[gl_cv_func_getopt_gnu=no],
[dnl Cross compiling. Guess based on host and declarations.
case $host_os:$ac_cv_have_decl_optreset in
*-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;
*:yes) gl_cv_func_getopt_gnu=no;;
*) gl_cv_func_getopt_gnu=yes;;
esac
])
case $gl_had_POSIXLY_CORRECT in
exported) ;;
yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
*) AS_UNSET([POSIXLY_CORRECT]) ;;
esac
])
if test "$gl_cv_func_getopt_gnu" = "no"; then
gl_replace_getopt=yes
fi
fi
])
# emacs' configure.in uses this.
AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
[
GETOPT_H=getopt.h
AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
[Define to rpl_ if the getopt replacement functions and variables
should be used.])
AC_SUBST([GETOPT_H])
])
# Prerequisites of lib/getopt*.
# emacs' configure.in uses this.
AC_DEFUN([gl_PREREQ_GETOPT],
[
AC_CHECK_DECLS_ONCE([getenv])
])

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