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| author | ro <ro@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-01-23 13:03:25 +0000 |
|---|---|---|
| committer | ro <ro@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-01-23 13:03:25 +0000 |
| commit | dffe2d192cf2ab307e74213d13797b9e95c09b6a (patch) | |
| tree | 51a38715a0e7346a965322711a16d29cd887c919 /libitm/acinclude.m4 | |
| parent | b94ae734847346812da1f0ad2709fcdaf6d9ab3c (diff) | |
| download | gcc-dffe2d192cf2ab307e74213d13797b9e95c09b6a.tar.gz | |
Clear hardware capabilities on libitm.so with Sun ld
* clearcap.map: New file.
* acinclude.m4 (LIBITM_CHECK_LINKER_HWCAP): New test.
* configure.ac: Call it.
Clear HWCAP_LDFLAGS if defaulting to -mavx.
* Makefile.am (AM_LDFLAGS): Add $(HWCAP_LDFLAGS)
* configure: Regenerate.
* Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@183430 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libitm/acinclude.m4')
| -rw-r--r-- | libitm/acinclude.m4 | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/libitm/acinclude.m4 b/libitm/acinclude.m4 index 069738d8e80..1031f1f12c8 100644 --- a/libitm/acinclude.m4 +++ b/libitm/acinclude.m4 @@ -261,6 +261,36 @@ AC_DEFUN([LIBITM_CHECK_LINKER_FEATURES], [ dnl +dnl Check if the linker used supports linker maps to clear hardware +dnl capabilities. This is only supported by Sun ld at the moment. +dnl +dnl Defines: +dnl HWCAP_LDFLAGS='-Wl,-M,clearcap.map' if possible +dnl LD (as a side effect of testing) +dnl +AC_DEFUN([LIBITM_CHECK_LINKER_HWCAP], [ + test -z "$HWCAP_LDFLAGS" && HWCAP_LDFLAGS='' + AC_REQUIRE([AC_PROG_LD]) + + ac_save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LFLAGS -Wl,-M,$srcdir/clearcap.map" + + AC_MSG_CHECKING([for ld that supports -Wl,-M,mapfile]) + AC_TRY_LINK([], [return 0;], [ac_hwcap_ldflags=yes],[ac_hwcap_ldflags=no]) + if test "$ac_hwcap_ldflags" = "yes"; then + HWCAP_LDFLAGS="-Wl,-M,$srcdir/clearcap.map $HWCAP_LDFLAGS" + fi + AC_MSG_RESULT($ac_hwcap_ldflags) + + LDFLAGS="$ac_save_LDFLAGS" + + AC_SUBST(HWCAP_LDFLAGS) + + AM_CONDITIONAL(HAVE_HWCAP, test $ac_hwcap_ldflags != no) +]) + + +dnl dnl Add version tags to symbols in shared library (or not), additionally dnl marking other symbols as private/local (or not). dnl |