1dnl 2dnl Check if the assembler used supports disabling generation of hardware 3dnl capabilities. This is only supported by Solaris as at the moment. 4dnl 5dnl Defines: 6dnl HWCAP_CFLAGS='-Wa,-nH' if possible. 7dnl 8AC_DEFUN([GCC_CHECK_ASSEMBLER_HWCAP], [ 9 test -z "$HWCAP_CFLAGS" && HWCAP_CFLAGS='' 10 AC_REQUIRE([AC_CANONICAL_TARGET]) 11 12 # Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH 13 # with a different meaning. 14 case ${target_os} in 15 solaris2*) 16 ac_save_CFLAGS="$CFLAGS" 17 CFLAGS="$CFLAGS -Wa,-nH" 18 19 AC_MSG_CHECKING([for as that supports -Wa,-nH]) 20 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no]) 21 if test "$ac_hwcap_flags" = "yes"; then 22 HWCAP_CFLAGS="-Wa,-nH $HWCAP_CFLAGS" 23 fi 24 AC_MSG_RESULT($ac_hwcap_flags) 25 26 CFLAGS="$ac_save_CFLAGS" 27 ;; 28 esac 29 30 AC_SUBST(HWCAP_CFLAGS) 31]) 32 33 34dnl 35dnl Check if the linker used supports linker maps to clear hardware 36dnl capabilities. This is only supported on Solaris at the moment. 37dnl 38dnl Defines: 39dnl HWCAP_LDFLAGS=-mclear-hwcap if possible 40dnl LD (as a side effect of testing) 41dnl 42AC_DEFUN([GCC_CHECK_LINKER_HWCAP], [ 43 test -z "$HWCAP_LDFLAGS" && HWCAP_LDFLAGS='' 44 AC_REQUIRE([AC_PROG_LD]) 45 46 ac_save_LDFLAGS="$LDFLAGS" 47 LDFLAGS="$LFLAGS -mclear-hwcap" 48 49 AC_MSG_CHECKING([for -mclear-hwcap]) 50 AC_TRY_LINK([], [return 0;], [ac_hwcap_ldflags=yes],[ac_hwcap_ldflags=no]) 51 if test "$ac_hwcap_ldflags" = "yes"; then 52 HWCAP_LDFLAGS="-mclear-hwcap $HWCAP_LDFLAGS" 53 fi 54 AC_MSG_RESULT($ac_hwcap_ldflags) 55 56 LDFLAGS="$ac_save_LDFLAGS" 57 58 AC_SUBST(HWCAP_LDFLAGS) 59 60 AM_CONDITIONAL(HAVE_HWCAP, test $ac_hwcap_ldflags != no) 61]) 62