+++ src/lib/libc/lib/msun/src/math_private.h
@@ -225,6 +225,7 @@
 
 /* Asm versions of some functions. */
 
+#if 0 /* "Y" constraint not supported by gcc 4.3 */
 #ifdef __amd64__
 static __inline int
 irint(double x)
@@ -236,6 +237,7 @@
 }
 #define	HAVE_EFFICIENT_IRINT
 #endif
+#endif
 
 #ifdef __i386__
 static __inline int
