New submission from Matteo Vescovi <matteo.vesc...@yahoo.co.uk>: Hi,
It seems like distutils passes an invalid "-Wstrict-prototypes" flag when compiling a C++ extension module on Linux (tested on Debian lenny and sid). running build running build_py creating build creating build/lib.linux-i686-2.6 copying presage.py -> build/lib.linux-i686-2.6 running build_ext building '_presage' extension creating build/temp.linux-i686-2.6 gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -O2 -g -Wall -O2 -fPIC -I../../src/lib -I/usr/include/python2.6 -c presage_wrap.cpp -o build/temp.linux-i686-2.6/presage_wrap.o cc1plus: warning: command line option "-Wstrict-prototypes" is valid for Ada/C/ObjC but not for C++ g++ -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -L/usr/local/lib -Wl,--as-needed -g -O2 -g -Wall -O2 build/temp.linux-i686-2.6/presage_wrap.o -L../../src/lib/.libs -lpresage -o build/lib.linux-i686-2.6/_presage.so running build_scripts creating build/scripts-2.6 copying and adjusting presage_python_demo -> build/scripts-2.6 changing mode of build/scripts-2.6/presage_python_demo from 644 to 755 I did a bit of digging on this one. It looks like distutils reuses whatever flags python was built with. m...@burrow:/usr/lib/python2.5/distutils$ python2.5 Python 2.5.2 (r252:60911, Jan 24 2010, 14:53:14) [GCC 4.3.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import sysconfig >>> sysconfig.get_config_var("CFLAGS") '-fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes' >>> In /usr/lib/python2.5/distutils/unixcompiler.py I found this comment: # XXX Things not currently handled: # * optimization/debug/warning flags; we just use whatever's in Python's # Makefile and live with it. Is this adequate? If not, we might # have to have a bunch of subclasses GNUCCompiler, SGICCompiler, # SunCCompiler, and I suspect down that road lies madness. It would be nice is distutils was smart enough to recognize that a c++ module was being built and to strip the unneeded flags. Please consider this as a wishlist request, as this causes only a warning, not a failure. Cheers, - Matteo ---------- assignee: tarek components: Distutils messages: 108136 nosy: matteo.vescovi, tarek priority: normal severity: normal status: open title: distutils uses invalid "-Wstrict-prototypes" flag when compiling C++ extension module type: feature request versions: Python 2.5, Python 2.6 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue9031> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com