NEWS.stable: log cherry-pick [e446f25]->[c092018] relocatable-shell: Update suggested...

[gnulib.git] / m4 / nl_langinfo.m4

diff --git a/m4/nl_langinfo.m4 b/m4/nl_langinfo.m4
index e13546b..6976e77 100644 (file)
--- a/m4/nl_langinfo.m4
+++ b/m4/nl_langinfo.m4
@@ -1,5 +1,5 @@
-# nl_langinfo.m4 serial 2
-dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+# nl_langinfo.m4 serial 5
+dnl Copyright (C) 2009-2014 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.
@@ -9,18 +9,42 @@ AC_DEFUN([gl_FUNC_NL_LANGINFO],
   AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
   AC_REQUIRE([gl_LANGINFO_H])
   AC_CHECK_FUNCS_ONCE([nl_langinfo])
-  if test $HAVE_LANGINFO_H = 1 \
-     && test x$ac_cv_func_nl_langinfo = xyes; then
-    if test $HAVE_LANGINFO_CODESET = 1 && test $HAVE_LANGINFO_ERA = 1; then
+  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  if test $ac_cv_func_nl_langinfo = yes; then
+    # On Irix 6.5, YESEXPR is defined, but nl_langinfo(YESEXPR) is broken.
+    AC_CACHE_CHECK([whether YESEXPR works],
+      [gl_cv_func_nl_langinfo_yesexpr_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM([[#include <langinfo.h>
+]], [[return !*nl_langinfo(YESEXPR);
+]])],
+         [gl_cv_func_nl_langinfo_yesexpr_works=yes],
+         [gl_cv_func_nl_langinfo_yesexpr_works=no],
+         [
+         case "$host_os" in
+                   # Guess no on irix systems.
+           irix*)  gl_cv_func_nl_langinfo_yesexpr_works="guessing no";;
+                   # Guess yes elsewhere.
+           *)      gl_cv_func_nl_langinfo_yesexpr_works="guessing yes";;
+         esac
+         ])
+      ])
+    case $gl_cv_func_nl_langinfo_yesexpr_works in
+      *yes) FUNC_NL_LANGINFO_YESEXPR_WORKS=1 ;;
+      *)    FUNC_NL_LANGINFO_YESEXPR_WORKS=0 ;;
+    esac
+    AC_DEFINE_UNQUOTED([FUNC_NL_LANGINFO_YESEXPR_WORKS],
+      [$FUNC_NL_LANGINFO_YESEXPR_WORKS],
+      [Define to 1 if nl_langinfo (YESEXPR) returns a non-empty string.])
+    if test $HAVE_LANGINFO_CODESET = 1 && test $HAVE_LANGINFO_ERA = 1 \
+        && test $FUNC_NL_LANGINFO_YESEXPR_WORKS = 1; then
       :
     else
       REPLACE_NL_LANGINFO=1
       AC_DEFINE([REPLACE_NL_LANGINFO], [1],
         [Define if nl_langinfo exists but is overridden by gnulib.])
-      AC_LIBOBJ([nl_langinfo])
     fi
   else
     HAVE_NL_LANGINFO=0
-    AC_LIBOBJ([nl_langinfo])
   fi
 ])