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| author | Mark Wielaard <mjw@redhat.com> | 2015-05-31 22:37:19 +0200 |
|---|---|---|
| committer | Mark Wielaard <mjw@redhat.com> | 2015-06-05 14:52:29 +0200 |
| commit | 170f1bb0a8f49cd6c5e7b34aaa505928764866bb (patch) | |
| tree | dd5fc0594d3b6918f5bb121776c0c50cdab3ed0a /configure.ac | |
| parent | 616489da5005c63fe572df422f1936529c4743f5 (diff) | |
Fix sanitize-undefined config check. Don't ALLOW_UNALIGNED when checking.
The -fsanitize=undefined check need to use AC_LINK_IFELSE to make sure
libubsan is installed. When doing undefined checking we should disable
ALLOW_UNALIGNED memory accesses to catch issues where we do unaligned
accesses by accident.
Signed-off-by: Mark Wielaard <mjw@redhat.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index 6386e962..58366d54 100644 --- a/configure.ac +++ b/configure.ac @@ -202,13 +202,19 @@ if test "$use_undefined" = yes; then old_CXXFLAGS="$CXXFLAGS" # We explicitly use unaligned access when possible (see ALLOW_UNALIGNED) # We want to fail immediately on first error, don't try to recover. - CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize=alignment -fno-sanitize-recover" - CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize=alignment -fno-sanitize-recover" - AC_COMPILE_IFELSE([AC_LANG_SOURCE([])], use_undefined=yes, use_undefined=no) + CFLAGS="$CFLAGS -fsanitize=undefined -fno-sanitize-recover" + CXXFLAGS="$CXXFLAGS -fsanitize=undefined -fno-sanitize-recover" + AC_LINK_IFELSE([AC_LANG_SOURCE([int main (int argc, char **argv) { return 0; }])], use_undefined=yes, use_undefined=no) AS_IF([test "x$use_undefined" != xyes], AC_MSG_WARN([gcc undefined behaviour sanitizer not available]) CFLAGS="$old_CFLAGS" CXXFLAGS="$old_CXXFLAGS") fi +case $use_undefined in + yes) check_undefined_val=1 ;; + *) check_undefined_val=0 ;; +esac +AC_DEFINE_UNQUOTED(CHECK_UNDEFINED, $check_undefined_val, + [Building with -fsanitize=undefined or not]) AC_ARG_ENABLE([valgrind], AS_HELP_STRING([--enable-valgrind],[run all tests under valgrind]), |