Merge branch 'feature/upstream' into develop

1 files changed, 60 insertions, 4 deletions

diff --git a/gnulib-m4/setlocale.m4 b/gnulib-m4/setlocale.m4
index 802ee01..c0023d9 100644
--- a/gnulib-m4/setlocale.m4
+++ b/gnulib-m4/setlocale.m4
@@ -1,5 +1,5 @@
-# setlocale.m4 serial 4
-dnl Copyright (C) 2011-2018 Free Software Foundation, Inc.
+# setlocale.m4 serial 7
+dnl Copyright (C) 2011-2022 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.
@@ -7,23 +7,79 @@ 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 "$host_os" in
     dnl On native Windows systems, setlocale(category,NULL) does not look at
     dnl the environment variables LC_ALL, category, and LANG.
-    mingw*) REPLACE_SETLOCALE=1 ;;
+    mingw*) NEED_SETLOCALE_IMPROVED=1 ;;
     dnl On Cygwin 1.5.x, setlocale always succeeds but setlocale(LC_CTYPE,NULL)
     dnl is then still "C".
     cygwin*)
       case `uname -r` in
-        1.5.*) REPLACE_SETLOCALE=1 ;;
+        1.5.*) NEED_SETLOCALE_IMPROVED=1 ;;
+      esac
+      ;;
+    dnl On Android 4.3, setlocale(category,"C") always fails.
+    *)
+      AC_CACHE_CHECK([whether setlocale supports the C locale],
+        [gl_cv_func_setlocale_works],
+        [AC_RUN_IFELSE(
+           [AC_LANG_SOURCE([[
+#include <locale.h>
+int main ()
+{
+  return setlocale (LC_ALL, "C") == NULL;
+}]])],
+           [gl_cv_func_setlocale_works=yes],
+           [gl_cv_func_setlocale_works=no],
+           [case "$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 $NEED_SETLOCALE_MTSAFE = 1; then
+    LIB_SETLOCALE="$LIB_SETLOCALE_NULL"
+  else
+    LIB_SETLOCALE=
+  fi
+  dnl LIB_SETLOCALE is expected to be '-pthread' or '-lpthread' on AIX with gcc
+  dnl or xlc, and empty otherwise.
+  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.)
   :
 ])