From patchwork Tue Sep  4 06:36:07 2012
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Subject: [SH] Define NO_IMPLICIT_EXTERN_C for newlib targets
Date: Mon, 03 Sep 2012 20:36:07 -0000
From: Christian Bruel <christian.bruel@st.com>
X-Patchwork-Id: 181498
Message-Id: <5045A157.9060808@st.com>
To: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Cc: Kaz Kojima <kkojima@rr.iij4u.or.jp>

newlib uses extern "C" wrappers in its headers, so GCC can be told it is
C++ compatible.

this patch fixes :

FAIL: g++.dg/lookup/builtin5.C -std=c++11  scan-assembler _ZSt5atanhd t

Tested om the 4.7 and 4.8 branches, OK for both ?

nb: newlib can be added to the list of runtimes that need it (see
http://gcc.gnu.org/ml/gcc-patches/2012-06/msg01164.html), in case this
macro is removed in the future.

Thanks

Christian


2012-09-04  Christian Bruel  <christian.bruel@st.com>

	* config/sh/newlib.h (NO_IMPLICIT_EXTERN_C): Define.

Index: config/sh/newlib.h
===================================================================
--- config/sh/newlib.h	(revision 190714)
+++ config/sh/newlib.h	(working copy)
@@ -23,3 +23,7 @@

 #undef LIB_SPEC
 #define LIB_SPEC "-lc -lgloss"
+
+#undef  NO_IMPLICIT_EXTERN_C
+#define NO_IMPLICIT_EXTERN_C 1
+