- dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
- dnl option string (as of 2005-05-05).
- if test -z "$GETOPT_H"; then
- AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_gnu_getopt],
- [AC_RUN_IFELSE(
- [AC_LANG_PROGRAM([#include <getopt.h>],
- [[
- char *myargv[3];
- myargv[0] = "conftest";
- myargv[1] = "-+";
- myargv[2] = 0;
- return getopt (2, myargv, "+a") != '?';
- ]])],
- [gl_cv_func_gnu_getopt=yes],
- [gl_cv_func_gnu_getopt=no],
- [dnl cross compiling - pessimistically guess based on decls
- dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
- dnl option string (as of 2005-05-05).
- AC_CHECK_DECL([getopt_clip],
- [gl_cv_func_gnu_getopt=no], [gl_cv_func_gnu_getopt=yes],
- [#include <getopt.h>])])])
- if test "$gl_cv_func_gnu_getopt" = "no"; then
- GETOPT_H=getopt.h
+ if test -z "$gl_replace_getopt" && test $gl_getopt_required = GNU; then
+ AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_getopt_gnu],
+ [# Even with POSIXLY_CORRECT, the GNU extension of leading '-' in the
+ # optstring is necessary for programs like m4 that have POSIX-mandated
+ # semantics for supporting options interspersed with files.
+ # Also, since getopt_long is a GNU extension, we require optind=0.
+ gl_had_POSIXLY_CORRECT=${POSIXLY_CORRECT:+yes}
+ 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;
+ }
+ 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
+ ])
+ if test "$gl_had_POSIXLY_CORRECT" != yes; then
+ AS_UNSET([POSIXLY_CORRECT])
+ fi
+ ])
+ if test "$gl_cv_func_getopt_gnu" = "no"; then
+ gl_replace_getopt=yes