+ 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.
+ if test -z "$gl_replace_getopt"; then
+ AC_CACHE_CHECK([whether getopt is POSIX compatible],
+ [gl_cv_func_getopt_posix],
+ [
+ dnl This test fails on mingw and succeeds on all other platforms.
+ AC_TRY_RUN([
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* The glibc implementation of getopt supports setting optind = 0 as a means
+ of clearing the internal state, but other implementations don't. */
+#if (__GLIBC__ >= 2)
+# define OPTIND_MIN 0
+#else
+# define OPTIND_MIN 1
+#endif
+
+int
+main ()
+{
+ {
+ int argc = 0;
+ char *argv[10];
+ int c;
+
+ argv[argc++] = "program";
+ argv[argc++] = "-a";
+ argv[argc++] = "foo";
+ argv[argc++] = "bar";
+ optind = OPTIND_MIN;
+ opterr = 0;
+
+ c = getopt (argc, argv, "ab");
+ if (!(c == 'a'))
+ return 1;
+ c = getopt (argc, argv, "ab");
+ if (!(c == -1))
+ return 2;
+ if (!(optind == 2))
+ return 3;
+ }
+ /* Some internal state exists at this point. */
+ {
+ int argc = 0;
+ char *argv[10];
+ int c;
+
+ argv[argc++] = "program";
+ argv[argc++] = "donald";
+ argv[argc++] = "-p";
+ argv[argc++] = "billy";
+ argv[argc++] = "duck";
+ argv[argc++] = "-a";
+ argv[argc++] = "bar";
+ optind = OPTIND_MIN;
+ opterr = 0;
+
+ c = getopt (argc, argv, "+abp:q:");
+ if (!(c == -1))
+ return 4;
+ if (!(strcmp (argv[0], "program") == 0))
+ return 5;
+ if (!(strcmp (argv[1], "donald") == 0))
+ return 6;
+ if (!(strcmp (argv[2], "-p") == 0))
+ return 7;
+ if (!(strcmp (argv[3], "billy") == 0))
+ return 8;
+ if (!(strcmp (argv[4], "duck") == 0))
+ return 9;
+ if (!(strcmp (argv[5], "-a") == 0))
+ return 10;
+ if (!(strcmp (argv[6], "bar") == 0))
+ return 11;
+ if (!(optind == 1))
+ return 12;
+ }
+
+ return 0;
+}
+],
+ [gl_cv_func_getopt_posix=yes], [gl_cv_func_getopt_posix=no],
+ [case "$host_os" in
+ mingw*) gl_cv_func_getopt_posix="guessing no";;
+ *) 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],