diff options
| author | Pavel Roskin <proski@gnu.org> | 2012-05-07 20:30:48 +0200 |
|---|---|---|
| committer | David Kastrup <dak@gnu.org> | 2012-05-09 07:22:34 +0200 |
| commit | ca7baa2950c23337825b1c5f6e22e8fd514cd648 (patch) | |
| tree | b688cbfc0b5b59c1e9a57db078ece954826913a9 /stepmake | |
| parent | 9e52e03f6d8c4958c3c5335113332310c5c437c7 (diff) | |
Issue 2513: Build: add -fno-tree-vrp to CXXFLAGS for gcc 4.7.0
That optimization breaks min() call in simultaneous-music-iterator.cc
leading to incorrect output and bogus barcheck errors.
Generalize STEPMAKE_GXXCODEGENBUG to show bug description with the flag.
GCC bug reported:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53239
Signed-off-by: David Kastrup <dak@gnu.org>
Diffstat (limited to 'stepmake')
| -rw-r--r-- | stepmake/aclocal.m4 | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/stepmake/aclocal.m4 b/stepmake/aclocal.m4 index 8be2cab11d..42c65a58cd 100644 --- a/stepmake/aclocal.m4 +++ b/stepmake/aclocal.m4 @@ -287,12 +287,16 @@ AC_DEFUN(STEPMAKE_CXXTEMPLATE, [ ]) AC_DEFUN(STEPMAKE_GXXCODEGENBUG, [ - AC_MSG_CHECKING([options for known g++ tail call bug]) + AC_MSG_CHECKING([options for known g++ bugs]) case "$GXX:$CXX_VERSION" in yes:400600?) - AC_MSG_RESULT([-fno-optimize-sibling-calls]) + AC_MSG_RESULT([-fno-optimize-sibling-calls (tail call bug)]) CXXFLAGS="$CXXFLAGS -fno-optimize-sibling-calls" ;; + yes:400700?) + AC_MSG_RESULT([-fno-tree-vrp (comparison bug)]) + CXXFLAGS="$CXXFLAGS -fno-tree-vrp" + ;; *) AC_MSG_RESULT([none]) esac AC_SUBST(CXXFLAGS) |