diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1a923a0631b..6014d213dce 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-12-18  Kaz kojima  <kkojima@gcc.gnu.org>
+
+	* config/sh/linux.h (NO_IMPLICIT_EXTERN_C, CPLUSPLUS_CPP_SPEC):
+	Define.
+
 2002-12-17  Jason Merrill  <jason@redhat.com>
 
 	* genmultilib: Use 'cd ./foo'.
diff --git a/gcc/config/sh/linux.h b/gcc/config/sh/linux.h
index c4f6171a5d0..186bc9a0af3 100644
--- a/gcc/config/sh/linux.h
+++ b/gcc/config/sh/linux.h
@@ -30,6 +30,13 @@ Boston, MA 02111-1307, USA.  */
 /* This was defined in linux.h.  Define it here also. */
 #define HANDLE_PRAGMA_PACK_PUSH_POP
 
+/* Don't assume anything about the header files.  */
+#define NO_IMPLICIT_EXTERN_C
+
+/* The GNU C++ standard library requires that these macros be defined.  */
+#undef CPLUSPLUS_CPP_SPEC
+#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
+
 /* Enable DWARF 2 exceptions.  */
 #undef DWARF2_UNWIND_INFO
 #define DWARF2_UNWIND_INFO 1