diff -ru gcc-core/gcc/config/sh/linux-unwind.h gcc-core/gcc/config/sh/linux-unwind.h
--- gcc-core/gcc/config/sh/linux-unwind.h	2005-06-28 20:45:37.000000000 -0500
+++ gcc-core/gcc/config/sh/linux-unwind.h	2008-02-06 17:41:12.000000000 -0600
@@ -26,6 +26,8 @@
 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
+#ifndef inhibit_libc
+
 /* Do code reading to identify a signal frame, and set the frame
    state data appropriately.  See unwind-dw2.c for the structs.  */
 
@@ -249,3 +251,5 @@
   return _URC_NO_REASON;
 }
 #endif /* defined (__SH5__) */
+
+#endif
diff -ru gcc-core/gcc/config/alpha/linux-unwind.h gcc-core2/gcc/config/alpha/linux-unwind.h
--- gcc-core/gcc/config/alpha/linux-unwind.h	2005-06-24 20:22:41.000000000 -0500
+++ gcc-core2/gcc/config/alpha/linux-unwind.h	2010-01-10 20:05:56.000000000 -0600
@@ -26,6 +26,8 @@
 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */
 
+#ifndef inhibit_libc
+
 /* Do code reading to identify a signal frame, and set the frame
    state data appropriately.  See unwind-dw2.c for the structs.  */
 
@@ -80,3 +82,5 @@
   fs->retaddr_column = 64;
   return _URC_NO_REASON;
 }
+
+#endif