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)

])