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