diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/configure.ac b/configure.ac index d7316b9..cb79ea8 100644 --- a/configure.ac +++ b/configure.ac @@ -1454,8 +1454,15 @@ then # Clang also needs -fwrapv case $CC in - *clang*) WRAP="-fwrapv" - ;; + *clang*) + WRAP="-fwrapv" + # bpo-30104: Python/dtoa.c requires to be build with + # -fno-strict-aliasing to fix compiler issue on the + # double/ULong[2] union using clang 4.0 and optimization level + # -O2 or higher + # https://bugs.llvm.org//show_bug.cgi?id=31928 + ALIASING="-fno-strict-aliasing" + ;; esac case $ac_cv_prog_cc_g in @@ -1464,18 +1471,21 @@ then # Optimization messes up debuggers, so turn it off for # debug builds. if "$CC" -v --help 2>/dev/null |grep -- -Og > /dev/null; then - OPT="-g -Og -Wall $STRICT_PROTO" + OPT="-g -Og -Wall" else - OPT="-g -O0 -Wall $STRICT_PROTO" + OPT="-g -O0 -Wall" fi else - OPT="-g $WRAP -O3 -Wall $STRICT_PROTO" + OPT="-g $WRAP -O3 -Wall" fi ;; *) - OPT="-O3 -Wall $STRICT_PROTO" + OPT="-O3 -Wall" ;; esac + + OPT="$OPT $STRICT_PROTO $ALIASING" + case $ac_sys_system in SCO_SV*) OPT="$OPT -m486 -DSCO5" ;; |