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dnl
dnl Check if the assembler used supports disabling generation of hardware
dnl capabilities. This is only supported by Solaris as at the moment.
dnl
dnl Defines:
dnl HWCAP_CFLAGS='-Wa,-nH' if possible.
dnl
AC_DEFUN([GCC_CHECK_ASSEMBLER_HWCAP], [
test -z "$HWCAP_CFLAGS" && HWCAP_CFLAGS=''
# Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH
# with a different meaning.
case ${target_os} in
solaris2*)
ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wa,-nH"
AC_MSG_CHECKING([for as that supports -Wa,-nH])
AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no])
if test "$ac_hwcap_flags" = "yes"; then
HWCAP_CFLAGS="-Wa,-nH $HWCAP_CFLAGS"
fi
AC_MSG_RESULT($ac_hwcap_flags)
CFLAGS="$ac_save_CFLAGS"
;;
esac
AC_SUBST(HWCAP_CFLAGS)
])
dnl
dnl Check if the linker used supports linker maps to clear hardware
dnl capabilities. This is only supported on Solaris at the moment.
dnl
dnl Defines:
dnl HWCAP_LDFLAGS=-mclear-hwcap if possible
dnl LD (as a side effect of testing)
dnl
AC_DEFUN([GCC_CHECK_LINKER_HWCAP], [
test -z "$HWCAP_LDFLAGS" && HWCAP_LDFLAGS=''
AC_REQUIRE([AC_PROG_LD])
ac_save_LDFLAGS="$LDFLAGS"
LDFLAGS="$LFLAGS -mclear-hwcap"
AC_MSG_CHECKING([for -mclear-hwcap])
AC_TRY_LINK([], [return 0;], [ac_hwcap_ldflags=yes],[ac_hwcap_ldflags=no])
if test "$ac_hwcap_ldflags" = "yes"; then
HWCAP_LDFLAGS="-mclear-hwcap $HWCAP_LDFLAGS"
fi
AC_MSG_RESULT($ac_hwcap_ldflags)
LDFLAGS="$ac_save_LDFLAGS"
AC_SUBST(HWCAP_LDFLAGS)
AM_CONDITIONAL(HAVE_HWCAP, test $ac_hwcap_ldflags != no)
])
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