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From: "ktietz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/55268] gcc4.8 mingw-w64 wrong stdcall import symbols generated after rev 193204
Date: Wed, 14 Nov 2012 12:28:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55268

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-11-14
                 CC|                            |ktietz at gcc dot gnu.org
     Ever Confirmed|0                           |1

--- Comment #2 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-11-14 12:28:22 UTC ---
I have the following patch which should solve this issue:

Index: i386.c
===================================================================
--- i386.c      (Revision 193485)
+++ i386.c      (Arbeitskopie)
@@ -28805,7 +28805,10 @@
   /* For function version, add the target suffix to the assembler name.  */
   if (TREE_CODE (decl) == FUNCTION_DECL
       && DECL_FUNCTION_VERSIONED (decl))
-    return ix86_mangle_function_version_assembler_name (decl, id);
+    id = ix86_mangle_function_version_assembler_name (decl, id);
+#ifdef TARGET_MANGLE_DECL_ASSEMBLER_NAME
+  id = TARGET_MANGLE_DECL_ASSEMBLER_NAME (decl, id);
+#endif

   return id;
 }