dnl Common configure.ac fragment
dnl
-dnl Copyright (C) 2012-2015 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
# 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
AC_SUBST(WARN_CFLAGS)
AC_SUBST(NO_WERROR)
+ AC_SUBST(WARN_WRITE_STRINGS)
])