Sync with Gnulib stable-202507 code (a8ac9f9ce5)

1 files changed, 67 insertions, 0 deletions

diff --git a/gl/m4/strcasecmp.m4 b/gl/m4/strcasecmp.m4
new file mode 100644
index 00000000..eb4345d9
--- /dev/null
+++ b/gl/m4/strcasecmp.m4
@@ -0,0 +1,67 @@
+# strcasecmp.m4
+# serial 3
+dnl Copyright (C) 2002-2025 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.
+dnl This file is offered as-is, without any warranty.
+
+AC_DEFUN([gl_FUNC_STRCASECMP],
+[
+  AC_REQUIRE([gl_STRINGS_H_DEFAULTS])
+  AC_CHECK_FUNCS([strcasecmp])
+  if test $ac_cv_func_strcasecmp = yes; then
+    gl_STRCASECMP_WORKS
+    case "$gl_cv_func_strcasecmp_works" in
+      *yes) ;;
+      *) REPLACE_STRCASECMP=1 ;;
+    esac
+  else
+    HAVE_STRCASECMP=0
+  fi
+])
+
+AC_DEFUN([gl_STRCASECMP_WORKS],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CACHE_CHECK([whether strcasecmp works],
+    [gl_cv_func_strcasecmp_works],
+    [dnl Prepare a guess, used when cross-compiling or when specific locales
+     dnl are not available.
+     case "$host_os" in
+       solaris* | cygwin*)
+         gl_cv_func_strcasecmp_works="guessing no" ;;
+       *)
+         gl_cv_func_strcasecmp_works="guessing yes" ;;
+     esac
+     AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <ctype.h>
+#include <locale.h>
+#include <strings.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "fr_FR.ISO-8859-1") != NULL
+      || setlocale (LC_ALL, "fr_FR.ISO8859-1") != NULL)
+    {
+      int c1 = (unsigned char) '\311';
+      int c2 = (unsigned char) '\351';
+      if (tolower (c1) == c2 && toupper (c2) == c1)
+        return strcasecmp ("Fej\311r", "Fej\351r") != 0;
+    }
+  return 2;
+}]])],
+       [gl_cv_func_strcasecmp_works=yes],
+       [if test $? = 1; then
+          gl_cv_func_strcasecmp_works=no
+        fi
+       ],
+       [:])
+    ])
+])
+
+# Prerequisites of lib/strcasecmp.c.
+AC_DEFUN([gl_PREREQ_STRCASECMP], [
+  :
+])