From a9d1924d22a91e99390f58b55b85108443c74102 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@bigpond.net.au>
Date: Wed, 7 Apr 2010 07:19:00 +0000
Subject: [PATCH] 	* warning.m4 (GCC_WARN_CFLAGS): Only add -Wshadow for
 gcc-4 and above. 	* configure: Regenerate.

---
 bfd/ChangeLog  |  5 +++++
 bfd/configure  | 16 ++++++++++++++--
 bfd/warning.m4 |  5 +++--
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 1d4fecb8f..a4548e02e 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,8 @@
+2010-04-07  Alan Modra  <amodra@gmail.com>
+
+	* warning.m4 (GCC_WARN_CFLAGS): Only add -Wshadow for gcc-4 and above.
+	* configure: Regenerate.
+
 2010-04-06  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/11434
diff --git a/bfd/configure b/bfd/configure
index 0f73da3c2..f4aba27fe 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -12128,7 +12128,19 @@ fi
 
 
 
-GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow"
+GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+__GNUC__
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "^[0-3]$" >/dev/null 2>&1; then :
+
+else
+  GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow"
+fi
+rm -f conftest*
+
 
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
@@ -12140,7 +12152,7 @@ if test "${enable_werror+set}" = set; then :
 fi
 
 
-# Enable -Wno-format by default when using gcc on mingw
+# Disable -Wformat by default when using gcc on mingw
 case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
diff --git a/bfd/warning.m4 b/bfd/warning.m4
index b4a2f48f8..6b846bf4e 100644
--- a/bfd/warning.m4
+++ b/bfd/warning.m4
@@ -1,7 +1,8 @@
 dnl Common configure.in fragment
 
 AC_DEFUN([AM_BINUTILS_WARNINGS],[
-GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow"
+GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+AC_EGREP_CPP([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow")
 
 AC_ARG_ENABLE(werror,
   [  --enable-werror         treat compile warnings as errors],
@@ -11,7 +12,7 @@ AC_ARG_ENABLE(werror,
      *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
    esac])
 
-# Enable -Wno-format by default when using gcc on mingw
+# Disable -Wformat by default when using gcc on mingw
 case "${host}" in
   *-*-mingw32*)
     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
-- 
2.11.4.GIT