# Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
#
# relro.m4 v1.1 2004-01-30
# Check whether '-z relro' works.
# Robert Connolly - robert@linuxfromscratch.org

# AC_PROG_CC_RELRO
AC_DEFUN([_AC_PROG_CC_RELRO],
[AC_REQUIRE([AC_PROG_CC])
AC_LANG([C])
ac_save_CFLAGS=$CFLAGS
CFLAGS="-Wl,-z,relro $CFLAGS"
AC_CACHE_CHECK(whether the $CC linker accepts -z relro, ac_cv_prog_cc_relro,
	[_AC_LINK_IFELSE([AC_LANG_PROGRAM()], [ac_cv_prog_cc_relro=yes],
		[ac_cv_prog_cc_relro=no])])
AC_SUBST(RELROLDFLAGS)
CFLAGS="$ac_save_CFLAGS"
if test $ac_cv_prog_cc_relro = yes; then
    RELROLDFLAGS="-z relro"
else
    RELROLDFLAGS=""
fi[]dnl
])# _AC_PROG_CC_RELRO

# AC_PROG_CXX_RELRO
# Use this if the package is c++ only.
AC_DEFUN([_AC_PROG_CXX_RELRO],
[AC_REQUIRE([AC_PROG_CXX])
AC_LANG([C++])
ac_save_CXXFLAGS=$CXXFLAGS
CXXFLAGS="-Wl,-z,relro $CXXFLAGS"
AC_CACHE_CHECK(whether the $CXX linker accepts -z relro, ac_cv_prog_cxx_relro,
        [_AC_LINK_IFELSE([AC_LANG_PROGRAM()], [ac_cv_prog_cxx_relro=yes],
                [ac_cv_prog_cxx_relro=no])])
AC_SUBST(RELROLDFLAGS)
CXXFLAGS="$ac_save_CXXFLAGS"
if test $ac_cv_prog_cxx_relro = yes; then
    RELROLDFLAGS="-z relro"
else
    RELROLDFLAGS=""
fi[]dnl
])# _AC_PROG_CXX_RELRO