1 files changed, 88 insertions, 0 deletions
diff --git a/m4/setlocale.m4 b/m4/setlocale.m4
new file mode 100644
index 0000000..2e8094d
--- /dev/null
+++ b/m4/setlocale.m4
@@ -0,0 +1,88 @@
+# setlocale.m4 serial 9
+dnl Copyright (C) 2011-2023 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.
+
+AC_DEFUN([gl_FUNC_SETLOCALE],
+[
+  AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_SETLOCALE_NULL])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+
+  dnl Test whether we need to improve on the general working of setlocale.
+  NEED_SETLOCALE_IMPROVED=0
+  case "$host_os" in
+    dnl On native Windows systems, setlocale(category,NULL) does not look at
+    dnl the environment variables LC_ALL, category, and LANG.
+    mingw*) NEED_SETLOCALE_IMPROVED=1 ;;
+    dnl On Cygwin 1.5.x, setlocale always succeeds but setlocale(LC_CTYPE,NULL)
+    dnl is then still "C".
+    cygwin*)
+      case `uname -r` in
+        1.5.*) NEED_SETLOCALE_IMPROVED=1 ;;
+      esac
+      ;;
+    dnl On Android 4.3, setlocale(category,"C") always fails.
+    *)
+      AC_CACHE_CHECK([whether setlocale supports the C locale],
+        [gl_cv_func_setlocale_works],
+        [AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <locale.h>
+int main ()
+{
+  return setlocale (LC_ALL, "C") == NULL;
+}]])],
+           [gl_cv_func_setlocale_works=yes],
+           [gl_cv_func_setlocale_works=no],
+           [case "$host_os" in
+                               # Guess no on Android.
+              linux*-android*) gl_cv_func_setlocale_works="guessing no";;
+                               # Guess yes otherwise.
+              *)               gl_cv_func_setlocale_works="guessing yes";;
+            esac
+           ])
+        ])
+      case "$gl_cv_func_setlocale_works" in
+        *yes) ;;
+        *) NEED_SETLOCALE_IMPROVED=1 ;;
+      esac
+      ;;
+  esac
+  AC_DEFINE_UNQUOTED([NEED_SETLOCALE_IMPROVED], [$NEED_SETLOCALE_IMPROVED],
+    [Define to 1 to enable general improvements of setlocale.])
+
+  dnl Test whether we need a multithread-safe setlocale(category,NULL).
+  NEED_SETLOCALE_MTSAFE=0
+  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
+    NEED_SETLOCALE_MTSAFE=1
+  fi
+  AC_DEFINE_UNQUOTED([NEED_SETLOCALE_MTSAFE], [$NEED_SETLOCALE_MTSAFE],
+    [Define to 1 to enable a multithread-safety fix of setlocale.])
+
+  if test $NEED_SETLOCALE_IMPROVED = 1 || test $NEED_SETLOCALE_MTSAFE = 1; then
+    REPLACE_SETLOCALE=1
+  fi
+
+  if test $NEED_SETLOCALE_MTSAFE = 1; then
+    SETLOCALE_LIB="$SETLOCALE_NULL_LIB"
+  else
+    SETLOCALE_LIB=
+  fi
+  dnl SETLOCALE_LIB is expected to be '-pthread' or '-lpthread' on AIX with gcc
+  dnl or xlc, and empty otherwise.
+  AC_SUBST([SETLOCALE_LIB])
+  dnl For backward compatibility.
+  LIB_SETLOCALE="$SETLOCALE_LIB"
+  AC_SUBST([LIB_SETLOCALE])
+])
+
+# Prerequisites of lib/setlocale.c.
+AC_DEFUN([gl_PREREQ_SETLOCALE],
+[
+  dnl No need to check for CFLocaleCopyPreferredLanguages and
+  dnl CFPreferencesCopyAppValue because lib/setlocale.c is not used on Mac OS X.
+  dnl (The Mac OS X specific code is only used in libintl.)
+  :
+])