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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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