diff options
| -rw-r--r-- | Misc/ACKS | 1 | ||||
| -rw-r--r-- | Misc/NEWS | 4 | ||||
| -rw-r--r-- | configure.in | 6 |
3 files changed, 10 insertions, 1 deletions
@@ -167,6 +167,7 @@ Yves Dionne Daniel Dittmar Walter Dörwald Jaromir Dolecek +Ismail Donmez Dima Dorfman Cesar Douady Dean Draayer @@ -1123,6 +1123,10 @@ Tools/Demos Build ----- +- Bug #1608: use -fwrapv when GCC supports it. This is important, + newer GCC versions may optimize away overflow buffer overflow checks + without this option! + - Patch #1418: Make the AC_REPLACE_FUNCS object files actually work. - Add a FAST_LOOPS build option that speeds-up looping by trading away diff --git a/configure.in b/configure.in index b0313e2472..496495483e 100644 --- a/configure.in +++ b/configure.in @@ -757,6 +757,10 @@ then if test "$CC" != 'g++' ; then STRICT_PROTO="-Wstrict-prototypes" fi + # For gcc 4.x we need to use -fwrapv so lets check if its supported + if "$CC" -v --help 2>/dev/null |grep -- -fwrapv > /dev/null; then + WRAP="-fwrapv" + fi case $ac_cv_prog_cc_g in yes) if test "$Py_DEBUG" = 'true' ; then @@ -764,7 +768,7 @@ then # debug builds. OPT="-g -Wall $STRICT_PROTO" else - OPT="-g -O3 -Wall $STRICT_PROTO" + OPT="-g $WRAP -O3 -Wall $STRICT_PROTO" fi ;; *) |