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| author | Yang Tse <yangsita@gmail.com> | 2010-11-18 17:11:38 +0100 |
|---|---|---|
| committer | Yang Tse <yangsita@gmail.com> | 2010-11-18 17:11:38 +0100 |
| commit | 4d44b54c75dfa0b64fcfb55362f54b54ec956059 (patch) | |
| tree | a577c0a8762bc1dfca7e0a09a87c3d0358af8eda /m4 | |
| parent | 461fa89e0a5d27c462dfab4dce26d4818ec3d22f (diff) | |
| download | c-ares-4d44b54c75dfa0b64fcfb55362f54b54ec956059.tar.gz c-ares-4d44b54c75dfa0b64fcfb55362f54b54ec956059.tar.bz2 c-ares-4d44b54c75dfa0b64fcfb55362f54b54ec956059.zip | |
configure: use autobuilds to temporarily verify strict aliasing warnings.
Temporarily, When cross-compiling with gcc 3.0 or later, enable strict aliasing
rules and warnings. Given that cross-compiled targets autobuilds do not run the
test-suite, there is no risk of running code that violates strict aliasing rules
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/cares-compilers.m4 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/m4/cares-compilers.m4 b/m4/cares-compilers.m4 index 3a57389..695c82a 100644 --- a/m4/cares-compilers.m4 +++ b/m4/cares-compilers.m4 @@ -931,6 +931,11 @@ AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [ dnl Also, on gcc 4.0.X it is totally unbearable and complains all dnl over making it unusable for generic purposes. Let's not use it. tmp_CFLAGS="$tmp_CFLAGS" + dnl When cross-compiling with gcc 3.0 or later, + dnl enable strict aliasing rules and warnings. + if test "x$cross_compiling" = "xyes"; then + tmp_CFLAGS="$tmp_CFLAGS -fstrict-aliasing -Wstrict-aliasing=2" + fi fi # dnl Only gcc 3.3 or later |