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dnl Copyright (C) 2002-2006, 2008 Free Software Foundation, Inc.
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dnl Copyright (C) 2002-2006, 2008-2010 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# The getopt module assume you want GNU getopt, with getopt_long etc,
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# rather than vanilla POSIX getopt. This means your code should
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# always include <getopt.h> for the getopt prototypes.
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AC_DEFUN([gl_GETOPT_SUBSTITUTE],
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# Request a POSIX compliant getopt function.
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AC_DEFUN([gl_FUNC_GETOPT_POSIX],
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m4_divert_text([DEFAULTS], [gl_getopt_required=POSIX])
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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# Request a POSIX compliant getopt function with GNU extensions (such as
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# options with optional arguments) and the functions getopt_long,
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AC_DEFUN([gl_FUNC_GETOPT_GNU],
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m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU])
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AC_REQUIRE([gl_FUNC_GETOPT_POSIX])
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# Request the gnulib implementation of the getopt functions unconditionally.
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AC_DEFUN([gl_REPLACE_GETOPT],
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dnl Arrange for getopt.h to be created.
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gl_GETOPT_SUBSTITUTE_HEADER
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dnl Arrange for unistd.h to include getopt.h.
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GNULIB_UNISTD_H_GETOPT=1
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dnl Arrange to compile the getopt implementation.
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AC_LIBOBJ([getopt])
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AC_LIBOBJ([getopt1])
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gl_GETOPT_SUBSTITUTE_HEADER
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# emacs' configure.in uses this.
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AC_DEFUN([gl_GETOPT_IFELSE],
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AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
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AS_IF([test -n "$gl_replace_getopt"], [$1], [$2])
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# Determine whether to replace the entire getopt facility.
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AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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dnl Persuade Solaris <unistd.h> to declare optarg, optind, opterr, optopt.
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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gl_CHECK_NEXT_HEADERS([getopt.h])
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AC_CHECK_HEADERS_ONCE([getopt.h])
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if test $ac_cv_header_getopt_h = yes; then
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AC_SUBST([HAVE_GETOPT_H])
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dnl Test whether <getopt.h> is available.
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if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
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AC_CHECK_HEADERS([getopt.h], [], [gl_replace_getopt=yes])
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dnl Test whether the function getopt_long is available.
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if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
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AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes])
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dnl BSD getopt_long uses an incompatible method to reset option processing.
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dnl Existence of the variable, in and of itself, is not a reason to replace
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dnl getopt, but knowledge of the variable is needed to determine how to
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dnl reset and whether a reset reparses the environment.
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if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
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AC_CHECK_DECLS([optreset], [], [],
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[[#include <getopt.h>]])
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dnl mingw's getopt (in libmingwex.a) does weird things when the options
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dnl strings starts with '+' and it's not the first call. Some internal state
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dnl is left over from earlier calls, and neither setting optind = 0 nor
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dnl setting optreset = 1 get rid of this internal state.
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dnl POSIX is silent on optind vs. optreset, so we allow either behavior.
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if test -z "$gl_replace_getopt"; then
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AC_CACHE_CHECK([whether getopt is POSIX compatible],
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[gl_cv_func_getopt_posix],
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dnl This test fails on mingw and succeeds on all other platforms.
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#if !HAVE_DECL_OPTRESET
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# define OPTIND_MIN 0
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# define OPTIND_MIN 1
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argv[argc++] = "program";
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argv[argc++] = "foo";
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argv[argc++] = "bar";
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c = getopt (argc, argv, "ab");
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c = getopt (argc, argv, "ab");
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/* Some internal state exists at this point. */
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argv[argc++] = "program";
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argv[argc++] = "donald";
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argv[argc++] = "billy";
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argv[argc++] = "duck";
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argv[argc++] = "bar";
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c = getopt (argc, argv, "+abp:q:");
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if (!(strcmp (argv[0], "program") == 0))
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if (!(strcmp (argv[1], "donald") == 0))
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if (!(strcmp (argv[2], "-p") == 0))
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if (!(strcmp (argv[3], "billy") == 0))
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if (!(strcmp (argv[4], "duck") == 0))
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if (!(strcmp (argv[5], "-a") == 0))
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if (!(strcmp (argv[6], "bar") == 0))
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[gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
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mingw*) gl_cv_func_getopt_posix="guessing no";;
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*) gl_cv_func_getopt_posix="guessing yes";;
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case "$gl_cv_func_getopt_posix" in
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*no) gl_replace_getopt=yes ;;
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if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
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AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
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[# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
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# optstring is necessary for programs like m4 that have POSIX-mandated
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# semantics for supporting options interspersed with files.
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# Also, since getopt_long is a GNU extension, we require optind=0.
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gl_had_POSIXLY_CORRECT=${POSIXLY_CORRECT:+yes}
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export POSIXLY_CORRECT
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[AC_LANG_PROGRAM([[#include <getopt.h>
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/* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw,
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and fails on MacOS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5,
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OSF/1 5.1, Solaris 10. */
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myargv[0] = "conftest";
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if (getopt (2, myargv, "+a") != '?')
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/* This code succeeds on glibc 2.8, mingw,
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and fails on MacOS X 10.5, OpenBSD 4.0, AIX 5.2, HP-UX 11,
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IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x. */
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char *argv[] = { "program", "-p", "foo", "bar", NULL };
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if (getopt (4, argv, "p::") != 'p')
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if (getopt (4, argv, "p::") != -1)
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/* This code succeeds on glibc 2.8 and fails on Cygwin 1.7.0. */
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char *argv[] = { "program", "foo", "-p", NULL };
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if (getopt (3, argv, "-p") != 1)
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if (getopt (3, argv, "-p") != 'p')
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[gl_cv_func_getopt_gnu=yes],
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[gl_cv_func_getopt_gnu=no],
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[dnl Cross compiling. Guess based on host and declarations.
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case $host_os:$ac_cv_have_decl_optreset in
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*-gnu*:* | mingw*:*) gl_cv_func_getopt_gnu=no;;
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*:yes) gl_cv_func_getopt_gnu=no;;
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*) gl_cv_func_getopt_gnu=yes;;
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if test "$gl_had_POSIXLY_CORRECT" != yes; then
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AS_UNSET([POSIXLY_CORRECT])
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if test "$gl_cv_func_getopt_gnu" = "no"; then
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gl_replace_getopt=yes
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# emacs' configure.in uses this.
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AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
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AC_SUBST([GETOPT_H])
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AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
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if test -z "$GETOPT_H"; then
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AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
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if test -z "$GETOPT_H"; then
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AC_CHECK_FUNCS([getopt_long_only], [], [GETOPT_H=getopt.h])
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dnl BSD getopt_long uses an incompatible method to reset option processing,
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dnl and (as of 2004-10-15) mishandles optional option-arguments.
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if test -z "$GETOPT_H"; then
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AC_CHECK_DECL([optreset], [GETOPT_H=getopt.h], [], [#include <getopt.h>])
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dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
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dnl option string (as of 2005-05-05).
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if test -z "$GETOPT_H"; then
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AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_gnu_getopt],
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[AC_LANG_PROGRAM([[#include <getopt.h>]],
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myargv[0] = "conftest";
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return getopt (2, myargv, "+a") != '?';
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[gl_cv_func_gnu_getopt=yes],
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[gl_cv_func_gnu_getopt=no],
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[dnl cross compiling - pessimistically guess based on decls
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dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
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dnl option string (as of 2005-05-05).
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AC_CHECK_DECL([getopt_clip],
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[gl_cv_func_gnu_getopt=no], [gl_cv_func_gnu_getopt=yes],
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[#include <getopt.h>])])])
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if test "$gl_cv_func_gnu_getopt" = "no"; then
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AC_DEFUN([gl_GETOPT_IFELSE],
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AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
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AS_IF([test -n "$GETOPT_H"], [$1], [$2])
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AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])
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# Prerequisites of lib/getopt*.
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# emacs' configure.in uses this.
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AC_DEFUN([gl_PREREQ_GETOPT],
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AC_CHECK_DECLS_ONCE([getenv])