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