Several fixes related to ARC PIE support.

[deliverable/binutils-gdb.git] / bfd / warning.m4

diff --git a/bfd/warning.m4 b/bfd/warning.m4
index b1a8c7b5a37183689564a9ae35408fb78074d50e..4c5b55d1f8c7896b8bb1e32d0c1abad2eb4ac403 100644 (file)
--- a/bfd/warning.m4
+++ b/bfd/warning.m4
@@ -1,17 +1,17 @@
-dnl Common configure.in fragment
+dnl Common configure.ac fragment
 dnl
-dnl   Copyright (C) 2012-2014 Free Software Foundation, Inc.
+dnl   Copyright (C) 2012-2016 Free Software Foundation, Inc.
 dnl
 dnl This file is free software; you can redistribute it and/or modify
 dnl it under the terms of the GNU General Public License as published by
 dnl the Free Software Foundation; either version 3 of the License, or
 dnl (at your option) any later version.
-dnl 
+dnl
 dnl This program is distributed in the hope that it will be useful,
 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 dnl GNU General Public License for more details.
-dnl 
+dnl
 dnl You should have received a copy of the GNU General Public License
 dnl along with this program; see the file COPYING3.  If not see
 dnl <http://www.gnu.org/licenses/>.
@@ -21,9 +21,19 @@ AC_DEFUN([AM_BINUTILS_WARNINGS],[
 # Set the 'development' global.
 . $srcdir/../bfd/development.sh
 
+# Default set of GCC warnings to enable.
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
+
+# Add -Wshadow if the compiler is a sufficiently recent version of GCC.
 AC_EGREP_CPP([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow")
 
+# Add -Wstack-usage if the compiler is a sufficiently recent version of GCC.
+AC_EGREP_CPP([^[0-4]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wstack-usage=262144")
+
+# Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
+WARN_WRITE_STRINGS=""
+AC_EGREP_CPP([^[0-3]$],[__GNUC__],,WARN_WRITE_STRINGS="-Wwrite-strings")
+
 AC_ARG_ENABLE(werror,
   [  --enable-werror         treat compile warnings as errors],
   [case "${enableval}" in
@@ -52,7 +62,7 @@ if test "${ERROR_ON_WARNING}" = yes ; then
     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
     NO_WERROR="-Wno-error"
 fi
-                  
+
 if test "${GCC}" = yes ; then
   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
 fi
@@ -77,4 +87,5 @@ fi
 
 AC_SUBST(WARN_CFLAGS)
 AC_SUBST(NO_WERROR)
+     AC_SUBST(WARN_WRITE_STRINGS)
 ])