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| author | Ned Deily <nad@python.org> | 2016-03-08 05:40:12 (GMT) |
|---|---|---|
| committer | Ned Deily <nad@python.org> | 2016-03-08 05:40:12 (GMT) |
| commit | 686905fe13fdd00bb02d9343e7574e38763b3711 (patch) | |
| tree | 5b962e71dbbd7e9df23600ce0d55e88539e95a3a /configure.ac | |
| parent | 8cd8883d27c59ad70366a59490f5ef6186d11522 (diff) | |
| parent | bec699e40d7e68d4039d2c1a352dcdb1661e77ef (diff) | |
| download | cpython-686905fe13fdd00bb02d9343e7574e38763b3711.zip cpython-686905fe13fdd00bb02d9343e7574e38763b3711.tar.gz cpython-686905fe13fdd00bb02d9343e7574e38763b3711.tar.bz2 | |
Issue #24324: merge from 3.5
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 41df7c3..1be558e 100644 --- a/configure.ac +++ b/configure.ac @@ -1483,14 +1483,23 @@ yes) ])) CFLAGS="$save_CFLAGS" CC="$ac_save_cc" - AC_MSG_RESULT($ac_cv_enable_unreachable_code_warning) # Don't enable unreachable code warning in debug mode, since it usually # results in non-standard code paths. - if test $ac_cv_enable_unreachable_code_warning = yes && test "$Py_DEBUG" != "true" + # Issue #24324: Unfortunately, the unreachable code warning does not work + # correctly on gcc and has been silently removed from the compiler. + # It is supported on clang but on OS X systems gcc may be an alias + # for clang. Try to determine if the compiler is not really gcc and, + # if so, only then enable the warning. + if test $ac_cv_enable_unreachable_code_warning = yes && \ + test "$Py_DEBUG" != "true" && \ + test -z "`$CC --version 2>/dev/null | grep 'Free Software Foundation'`" then BASECFLAGS="$BASECFLAGS -Wunreachable-code" + else + ac_cv_enable_unreachable_code_warning=no fi + AC_MSG_RESULT($ac_cv_enable_unreachable_code_warning) # if using gcc on alpha, use -mieee to get (near) full IEEE 754 # support. Without this, treatment of subnormals doesn't follow |