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Diffstat (limited to 'm4/getopt.m4')
| -rw-r--r-- | m4/getopt.m4 | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/m4/getopt.m4 b/m4/getopt.m4 new file mode 100644 index 0000000..595483d --- /dev/null +++ b/m4/getopt.m4 @@ -0,0 +1,381 @@ +# getopt.m4 serial 47 +dnl Copyright (C) 2002-2006, 2008-2020 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]) + AC_REQUIRE([gl_GETOPT_CHECK_HEADERS]) + 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], [ + REPLACE_GETOPT=1 + ], [ + REPLACE_GETOPT=0 + if test -n "$gl_replace_getopt"; then + REPLACE_GETOPT=1 + fi + ]) + if test $REPLACE_GETOPT = 1; then + dnl Arrange for getopt.h to be created. + gl_GETOPT_SUBSTITUTE_HEADER + 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], +[ + dnl Set the variable gl_getopt_required, so that all invocations of + dnl gl_GETOPT_CHECK_HEADERS in the scope of the current configure file + dnl will check for getopt with GNU extensions. + dnl This means that if one gnulib-tool invocation requests getopt-posix + dnl and another gnulib-tool invocation requests getopt-gnu, it is as if + dnl both had requested getopt-gnu. + m4_divert_text([INIT_PREPARE], [gl_getopt_required=GNU]) + + dnl No need to invoke gl_FUNC_GETOPT_POSIX here; this is automatically + dnl done through the module dependency getopt-gnu -> getopt-posix. +]) + +# 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 $gl_getopt_required = GNU; then + AC_CHECK_FUNCS([getopt_long_only], [], [gl_replace_getopt=yes]) + fi + + dnl POSIX 2008 does not specify leading '+' behavior, but see + dnl http://austingroupbugs.net/view.php?id=191 for a recommendation on + dnl the next version of POSIX. For now, we only guarantee leading '+' + dnl behavior with getopt-gnu. + if test -z "$gl_replace_getopt"; then + AC_CACHE_CHECK([whether getopt is POSIX compatible], + [gl_cv_func_getopt_posix], + [ + dnl Merging these three different test programs into a single one + dnl would require a reset mechanism. On BSD systems, it can be done + dnl through 'optreset'; on some others (glibc), it can be done by + dnl setting 'optind' to 0; on others again (HP-UX, IRIX, OSF/1, + dnl Solaris 9, musl libc), there is no such mechanism. + if test $cross_compiling = no; then + dnl Sanity check. Succeeds everywhere (except on MSVC, + dnl which lacks <unistd.h> and getopt() entirely). + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <unistd.h> +#include <stdlib.h> +#include <string.h> + +int +main () +{ + static char program[] = "program"; + static char a[] = "-a"; + static char foo[] = "foo"; + static char bar[] = "bar"; + char *argv[] = { program, a, foo, bar, NULL }; + int c; + + c = getopt (4, argv, "ab"); + if (!(c == 'a')) + return 1; + c = getopt (4, argv, "ab"); + if (!(c == -1)) + return 2; + if (!(optind == 2)) + return 3; + return 0; +} +]])], + [gl_cv_func_getopt_posix=maybe], + [gl_cv_func_getopt_posix=no]) + if test $gl_cv_func_getopt_posix = maybe; then + dnl Sanity check with '+'. Succeeds everywhere (except on MSVC, + dnl which lacks <unistd.h> and getopt() entirely). + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <unistd.h> +#include <stdlib.h> +#include <string.h> + +int +main () +{ + static char program[] = "program"; + static char donald[] = "donald"; + static char p[] = "-p"; + static char billy[] = "billy"; + static char duck[] = "duck"; + static char a[] = "-a"; + static char bar[] = "bar"; + char *argv[] = { program, donald, p, billy, duck, a, bar, NULL }; + int c; + + c = getopt (7, 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; + return 0; +} +]])], + [gl_cv_func_getopt_posix=maybe], + [gl_cv_func_getopt_posix=no]) + fi + if test $gl_cv_func_getopt_posix = maybe; then + dnl Detect Mac OS X 10.5, AIX 7.1, mingw bug. + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <unistd.h> +#include <stdlib.h> +#include <string.h> + +int +main () +{ + static char program[] = "program"; + static char ab[] = "-ab"; + char *argv[3] = { program, ab, NULL }; + if (getopt (2, argv, "ab:") != 'a') + return 13; + if (getopt (2, argv, "ab:") != '?') + return 14; + if (optopt != 'b') + return 15; + if (optind != 2) + return 16; + return 0; +} +]])], + [gl_cv_func_getopt_posix=yes], + [gl_cv_func_getopt_posix=no]) + fi + else + case "$host_os" in + darwin* | aix* | mingw*) gl_cv_func_getopt_posix="guessing no";; + *) gl_cv_func_getopt_posix="guessing yes";; + esac + fi + ]) + 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> + ]GL_NOCRASH[ + ]], [[ + int result = 0; + + nocrash_init(); + + /* This code succeeds on glibc 2.8, OpenBSD 4.0, Cygwin, mingw, + and fails on Mac OS X 10.5, AIX 5.2, HP-UX 11, IRIX 6.5, + OSF/1 5.1, Solaris 10. */ + { + static char conftest[] = "conftest"; + static char plus[] = "-+"; + char *argv[3] = { conftest, plus, NULL }; + opterr = 0; + if (getopt (2, argv, "+a") != '?') + result |= 1; + } + /* This code succeeds on glibc 2.8, mingw, + and fails on Mac OS 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. */ + { + static char program[] = "program"; + static char p[] = "-p"; + static char foo[] = "foo"; + static char bar[] = "bar"; + 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. */ + { + static char program[] = "program"; + static char foo[] = "foo"; + static char p[] = "-p"; + char *argv[] = { program, foo, p, NULL }; + optind = 0; + if (getopt (3, argv, "-p") != 1) + result |= 16; + else if (getopt (3, argv, "-p") != 'p') + result |= 16; + } + /* This code fails on glibc 2.11. */ + { + static char program[] = "program"; + static char b[] = "-b"; + static char a[] = "-a"; + char *argv[] = { program, b, a, NULL }; + optind = opterr = 0; + if (getopt (3, argv, "+:a:b") != 'b') + result |= 32; + else if (getopt (3, argv, "+:a:b") != ':') + result |= 32; + } + /* This code dumps core on glibc 2.14. */ + { + static char program[] = "program"; + static char w[] = "-W"; + static char dummy[] = "dummy"; + char *argv[] = { program, w, dummy, NULL }; + optind = opterr = 1; + if (getopt (3, argv, "W;") != 'W') + result |= 64; + } + return result; + ]])], + [gl_cv_func_getopt_gnu=yes], + [gl_cv_func_getopt_gnu=no], + [dnl Cross compiling. + dnl Assume the worst, even on glibc platforms. + dnl But obey --enable-cross-guesses. + gl_cv_func_getopt_gnu="$gl_cross_guess_normal" + ]) + 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" != yes; then + gl_replace_getopt=yes + else + AC_CACHE_CHECK([for working GNU getopt_long function], + [gl_cv_func_getopt_long_gnu], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <getopt.h> + #include <stddef.h> + #include <string.h> + ]], + [[static const struct option long_options[] = + { + { "xtremely-",no_argument, NULL, 1003 }, + { "xtra", no_argument, NULL, 1001 }, + { "xtreme", no_argument, NULL, 1002 }, + { "xtremely", no_argument, NULL, 1003 }, + { NULL, 0, NULL, 0 } + }; + /* This code fails on OpenBSD 5.0. */ + { + static char program[] = "program"; + static char xtremel[] = "--xtremel"; + char *argv[] = { program, xtremel, NULL }; + int option_index; + optind = 1; opterr = 0; + if (getopt_long (2, argv, "", long_options, &option_index) != 1003) + return 1; + } + return 0; + ]])], + [gl_cv_func_getopt_long_gnu=yes], + [gl_cv_func_getopt_long_gnu=no], + [dnl Cross compiling. Guess no on OpenBSD, yes otherwise. + case "$host_os" in + openbsd*) gl_cv_func_getopt_long_gnu="guessing no";; + *) gl_cv_func_getopt_long_gnu="guessing yes";; + esac + ]) + ]) + case "$gl_cv_func_getopt_long_gnu" in + *yes) ;; + *) gl_replace_getopt=yes ;; + esac + fi + fi +]) + +AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER], +[ + AC_CHECK_HEADERS_ONCE([sys/cdefs.h]) + if test $ac_cv_header_sys_cdefs_h = yes; then + HAVE_SYS_CDEFS_H=1 + else + HAVE_SYS_CDEFS_H=0 + fi + AC_SUBST([HAVE_SYS_CDEFS_H]) + + AC_DEFINE([__GETOPT_PREFIX], [[rpl_]], + [Define to rpl_ if the getopt replacement functions and variables + should be used.]) + GETOPT_H=getopt.h + GETOPT_CDEFS_H=getopt-cdefs.h + AC_SUBST([GETOPT_H]) + AC_SUBST([GETOPT_CDEFS_H]) +]) |