tests: fix localization test for GCC on HP-UX 11.00.

[Ralf Wildenhues]

http://autobuild.josefsson.org/libtool/log-201008291627782170000.txt
This patch fixes the spurious failure when the compiler is properly
setup for localization but the  'diff' program isn't.  :-)

Cheers,
Ralf

    tests: fix localization test for GCC on HP-UX 11.00.
    
    * tests/localization.at (localized compiler messages): Be sure
    to switch the locale only for the actual compiler commands, so
    we don't pick up warnings from helper tools such as diff which
    may not have the locale installed.

diff --git a/tests/localization.at b/tests/localization.at
index 71cdad4..392511e 100644
--- a/tests/localization.at
+++ b/tests/localization.at
@@ -1,7 +1,6 @@
 # localization.at -- libtool and locales                -*- Autotest -*-
 #
-#   Copyright (C) 2008, 2009 Free Software Foundation, Inc.
-#   Written by Ralf Wildenhues, 2008
+#   Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
 #
 #   This file is part of GNU Libtool.
 #
@@ -26,10 +25,8 @@ AT_SETUP([localized compiler messages])
 AT_KEYWORDS([libtool])
 
 # Let's try German locale.  :-)
-LANG=de_DE
-LANGUAGE=de_DE
-LC_ALL=de_DE
-export LANG LANGUAGE LC_ALL
+m4_pushdef([lt_localize],
+[LANG=de_DE LANGUAGE=de_DE LC_ALL=de_DE])
 
 AT_DATA([a.c],
 [[int x[-1];
@@ -39,13 +36,15 @@ AT_DATA([b.c],
 ]])
 
 # First see if setting a locale is accepted at all.
-AT_CHECK([$CC $CPPFLAGS $CFLAGS -c b.c || exit 77], [], [stdout], [stderr])
+AT_CHECK([(lt_localize $CC $CPPFLAGS $CFLAGS -c b.c) || exit 77],
+        [], [stdout], [stderr])
 
 # Find out about expected output.
-AT_CHECK([$CC $CPPFLAGS $CFLAGS -c a.c || exit 1], [1], [stdout], [stderr])
+AT_CHECK([(lt_localize $CC $CPPFLAGS $CFLAGS -c a.c) || exit 1],
+        [1], [stdout], [stderr])
 LT_AT_NORMALIZE_COMPILER_OUTPUT([stdout], [expected-stdout])
 LT_AT_NORMALIZE_COMPILER_OUTPUT([stderr], [expected-stderr])
-AT_CHECK([$LIBTOOL --mode=compile --tag=CC $CC $CPPFLAGS $CFLAGS -c a.c || 
exit 1],
+AT_CHECK([(lt_localize $LIBTOOL --mode=compile --tag=CC $CC $CPPFLAGS $CFLAGS 
-c a.c) || exit 1],
         [1], [stdout], [stderr])
 LT_AT_NORMALIZE_COMPILER_OUTPUT([stdout], [libtool-stdout])
 LT_AT_NORMALIZE_COMPILER_OUTPUT([stderr], [libtool-stderr])
@@ -63,10 +62,12 @@ AT_CHECK([diff expected-stderr libtool-stderr])
 AT_CHECK([diff expected-stdout libtool-stdout])
 
 # check that we get our quoting right.
-LANGUAGE='a; nosuchprogram " '\''  & $x /#+*(){}|,:`\ !%'
-export LANGUAGE
-AT_CHECK([$LIBTOOL --mode=compile --tag=CC $CC $CPPFLAGS $CFLAGS -c b.c],
+m4_define([lt_localize],
+[[LANGUAGE='a; nosuchprogram " '\''  & $x /#+*(){}|,:`\ !%']])
+AT_CHECK([(lt_localize $LIBTOOL --mode=compile --tag=CC $CC $CPPFLAGS $CFLAGS 
-c b.c)],
         [0], [stdout], [stderr])
 AT_CHECK([grep nosuchprogram stdout stderr], [1])
 
+m4_popdef([lt_localize])
+
 AT_CLEANUP