# getopt.m4 serial 31 dnl Copyright (C) 2002-2006, 2008-2010 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]) gl_GETOPT_IFELSE([ gl_REPLACE_GETOPT ], []) ]) # 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]) ]) # Request the gnulib implementation of the getopt functions unconditionally. # argp.m4 uses this. AC_DEFUN([gl_REPLACE_GETOPT], [ 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 dnl Arrange to compile the getopt implementation. AC_LIBOBJ([getopt]) AC_LIBOBJ([getopt1]) gl_PREREQ_GETOPT ]) # 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]) AC_CHECK_HEADERS_ONCE([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 $gl_getopt_required = GNU; then AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes]) fi dnl BSD getopt_long uses an incompatible method to reset option processing. dnl Existence of the variable, in and of itself, is not a reason to replace dnl getopt, but knowledge of the variable is needed to determine how to dnl reset and whether a reset reparses the environment. dnl Solaris supports neither optreset nor optind=0, but keeps no state that dnl needs a reset beyond setting optind=1; detect Solaris by getopt_clip. if test -z "$gl_replace_getopt"; then AC_CHECK_DECLS([optreset], [], [AC_CHECK_DECLS([getopt_clip], [], [], [[#include <getopt.h>]]) ], [[#include <getopt.h>]]) 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 "$gl_replace_getopt"; then AC_CACHE_CHECK([whether getopt is POSIX compatible], [gl_cv_func_getopt_posix], [ dnl This test fails on mingw and succeeds on many other platforms. AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include <unistd.h> #include <stdlib.h> #include <string.h> #if !HAVE_DECL_OPTRESET && !HAVE_DECL_GETOPT_CLIP # define OPTIND_MIN 0 #else # define OPTIND_MIN 1 #endif int main () { { int argc = 0; char *argv[10]; int c; argv[argc++] = "program"; argv[argc++] = "-a"; argv[argc++] = "foo"; argv[argc++] = "bar"; argv[argc] = NULL; optind = OPTIND_MIN; opterr = 0; c = getopt (argc, argv, "ab"); if (!(c == 'a')) return 1; c = getopt (argc, argv, "ab"); if (!(c == -1)) return 2; if (!(optind == 2)) return 3; } /* Some internal state exists at this point. */ { int argc = 0; char *argv[10]; int c; argv[argc++] = "program"; argv[argc++] = "donald"; argv[argc++] = "-p"; argv[argc++] = "billy"; argv[argc++] = "duck"; argv[argc++] = "-a"; argv[argc++] = "bar"; argv[argc] = NULL; optind = OPTIND_MIN; opterr = 0; c = getopt (argc, argv, "+abp:q:"); if (!(c == -1)) return 4; if (!(strcmp (argv[0], "program") == 0)) return 5; if (!(strcmp (argv[1], "donald") == 0)) return 6; if (!(strcmp (argv[2], "-p") == 0)) return 7; if (!(strcmp (argv[3], "billy") == 0)) return 8; if (!(strcmp (argv[4], "duck") == 0)) return 9; if (!(strcmp (argv[5], "-a") == 0)) return 10; if (!(strcmp (argv[6], "bar") == 0)) return 11; if (!(optind == 1)) return 12; } /* Detect MacOS 10.5, AIX 7.1 bug. */ { char *argv[3] = { "program", "-ab", NULL }; optind = OPTIND_MIN; opterr = 0; if (getopt (2, argv, "ab:") != 'a') return 13; if (getopt (2, argv, "ab:") != '?') return 14; if (optopt != 'b') return 15; if (optind != 2) return 16; } return 0; } ]])], [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no], [case "$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 ]) ]) 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> ]], [[ /* 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") != '?') return 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') return 2; if (optarg != NULL) return 3; if (getopt (4, argv, "p::") != -1) return 4; if (optind != 2) return 5; } /* 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) return 6; if (getopt (3, argv, "-p") != 'p') return 7; } /* This code fails on glibc 2.11. */ { char *argv[] = { "program", "-b", "-a", NULL }; optind = opterr = 0; if (getopt (3, argv, "+:a:b") != 'b') return 8; if (getopt (3, argv, "+:a:b") != ':') return 9; } return 0; ]])], [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]) ])