From: Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
Date: Wed, 29 Aug 2007 02:34:22 +0000 (+0000)
Subject: system.h (CONST_CAST): Avoid union for gcc-4.0.x.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0b51511b2f2139be93a7a4e7b3ac7683e0b85fc6;p=gcc.git

system.h (CONST_CAST): Avoid union for gcc-4.0.x.

	* system.h (CONST_CAST): Avoid union for gcc-4.0.x.

From-SVN: r127878
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d9724f8eb79..7b738c0e090 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2007-08-28  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* system.h (CONST_CAST): Avoid union for gcc-4.0.x.
+
 2007-08-28  Richard Guenther  <rguenther@suse.de>
 
 	* tree.h (struct tree_function_decl): Increase size of
diff --git a/gcc/system.h b/gcc/system.h
index 46da3817d80..c9a1b6b0573 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -774,7 +774,9 @@ extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
    execv, et al.  Another valid use would be in an allocation function
    that creates const objects that need to be initialized.  Most other
    cases should be viewed with extreme caution.  */
-#ifdef __GNUC__
+
+#if defined(__GNUC__) && GCC_VERSION != 4000
+/* GCC 4.0.x has a bug where it may ICE on this expression.  */
 #define CONST_CAST(X) ((__extension__(union {__typeof(X)_q; void *_v;})(X))._v)
 #else
 #define CONST_CAST(X) ((void*)(X))