[Patch] : Fix configure check for have_attribute_alias

[Danny Smith]

Hello,

The have_attribute_alias check in libgomp/acinclude.m4 is wrong.

The aliased target does not want a __USER_LABEL_PREFIX__. If if it did,
all the testcase involving the attribute in the testsuite should fail on
mingw32 and any other target that defines a non-empty
__USER_LABEL_PREFIX__

Here is the (obvious?) fix. Is this OK for mainline or should it wait
until branching?

Danny 


libgomp/ChangeLog

	* acinclude.m4 (have_attribute_alias): Don't use
__USER_LABEL_PREFIX__.
	* configure: Regenerate.

libgfortran/ChangeLog

	* acinclude.m4 (have_attribute_alias): Don't use
__USER_LABEL_PREFIX__.
	* configure: Regenerate.
 

This is the diff for libgomp.  Same except for line numbers in
libgfortran

Index: acinclude.m4
===================================================================
--- acinclude.m4	(revision 116011)
+++ acinclude.m4	(working copy)
@@ -47,11 +47,10 @@
   AC_CACHE_CHECK([whether the target supports symbol aliases],
 		 have_attribute_alias, [
   AC_TRY_LINK([
-#define ULP	STR1(__USER_LABEL_PREFIX__)
 #define STR1(x)	STR2(x)
 #define STR2(x)	#x
 void foo(void) { }
-extern void bar(void) __attribute__((alias(ULP "foo")));],
+extern void bar(void) __attribute__((alias("foo")));],
     [bar();], have_attribute_alias=yes, have_attribute_alias=no)])
   if test $have_attribute_alias = yes; then
     AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,