From 1859e37fd53a9e3f55d26579a9a18b7f4d7d8ed8 Mon Sep 17 00:00:00 2001
From: Marc Glisse <marc.glisse@inria.fr>
Date: Sat, 21 Jul 2012 13:04:35 +0200
Subject: Disable __builtin_constant_p for g++34.

---
 gmpxx.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'gmpxx.h')

diff --git a/gmpxx.h b/gmpxx.h
index 4f0171044..97c5e1907 100644
--- a/gmpxx.h
+++ b/gmpxx.h
@@ -32,7 +32,9 @@ along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
 #include <gmp.h>
 
 // wrapper for gcc's __builtin_constant_p
-#if defined (__GNUC__) && __GNUC__ >= 2
+// __builtin_constant_p has been in gcc since forever,
+// but g++-3.4 miscompiles it.
+#if __GMP_GNUC_PREREQ(4, 2)
 #define __GMPXX_CONSTANT(X) __builtin_constant_p(X)
 #else
 #define __GMPXX_CONSTANT(X) false
-- 
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