See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11096
and http://gcc.gnu.org/ml/gcc-patches/2003-06/msg00424.html

--- gcc-3.3/gcc/config/sh/linux.h.old	Wed Jun  4 17:37:40 2003
+++ gcc-3.3/gcc/config/sh/linux.h	Wed Jun  4 17:38:16 2003
@@ -53,5 +53,9 @@
    %{static:-static}"
 
+/* The GNU C++ standard library requires that these macros be defined.  */
+#undef CPLUSPLUS_CPP_SPEC
+#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
+
 #undef LIB_SPEC
 #define LIB_SPEC \
   "%{shared: -lc} \