New submission from Stefan Krah <stefan-use...@bytereef.org>: When CFLAGS are set, distutils drops -fno-strict-aliasing (among other flags):
$ python2.7 setup.py build ... gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I./src -I/usr/local/include -I/usr/local/include/python2.7 -c src/gmpy.c -o build/temp.linux-x86_64-2.7/src/gmpy.o ... $ CFLAGS="-fomit-frame-pointer" python2.7 setup.py build ... gcc -pthread -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fomit-frame-pointer -fPIC -I./src -I/usr/local/include -I/usr/local/include/python2.7 -c src/gmpy.c -o build/temp.linux-x86_64-2.7/src/gmpy.o src/gmpy.c: In function ‘_cmp_to_object’: src/gmpy.c:4692: warning: dereferencing type-punned pointer will break strict-aliasing rules ... I'm not sure if this is intentional. The documentation says: "Compiler flags can also be supplied through setting the CFLAGS environment variable. If set, the contents of CFLAGS will be added to the compiler flags specified in the Setup file." To me, this sounds as if they should be appended to the regular flags. ---------- assignee: tarek components: Distutils messages: 125591 nosy: eric.araujo, skrah, tarek priority: high severity: normal status: open title: Distutils drops -fno-strict-aliasing when CFLAGS are set type: behavior versions: Python 2.7, Python 3.1, Python 3.2 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue10847> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
