Bugs item #1600860, was opened at 2006-11-22 01:29 Message generated for change (Comment added) made by marienz You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1600860&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Distutils Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Marien Zwart (marienz) Assigned to: Nobody/Anonymous (nobody) Summary: --enable-shared links extensions to libpython statically Initial Comment: python 2.5 tries to link extension modules to libpython2.5 if python is compiled with --enable-shared (patch #1429775, bug #83279, svn r45232). To do this it adds -lpython2.5 and -L$PREFIX/lib/python2.5/config to the link command line. -lpython2.5 is fine, however the "config" directory it adds contains a static libpython2.5.a library. The libpython2.5.so I think it should be linking to is in $PREFIX/lib. The result is even a trivial extension pulls in (nearly) all of that library, so you get an extension that is over a megabyte in size where older pythons produce one of a few kilobytes. There is a comment on the referenced bug saying """ You can probably rely on libpythonxy.so ending up in $(DESTDIR)$(LIBDIR)/$(INSTSONAME), whose values you can retrieve from the installed Makefile (i.e. through distutils.config). """ so I think the patch that got applied does not do what was intended. ---------------------------------------------------------------------- >Comment By: Marien Zwart (marienz) Date: 2006-11-27 02:01 Message: Logged In: YES user_id=857292 Originator: YES Yes, that seems to fix it, thanks! ---------------------------------------------------------------------- Comment By: Martin v. Löwis (loewis) Date: 2006-11-25 14:42 Message: Logged In: YES user_id=21627 Originator: NO gustavo: you can only attach a patch if you are team member or creator of the bug report. I'm attaching your patch. marienz: can you please confirm whether this patch solves this problem? ---------------------------------------------------------------------- Comment By: Gustavo J. A. M. Carneiro (gustavo) Date: 2006-11-25 14:10 Message: Logged In: YES user_id=908 Originator: NO *sigh* why doesn't SF let me attach patches? :( You can find a patch to fix this here: http://www.gnome.org/~gjc/linux-shlib.diff ---------------------------------------------------------------------- Comment By: Gustavo J. A. M. Carneiro (gustavo) Date: 2006-11-23 21:47 Message: Logged In: YES user_id=908 Originator: NO Hmm.. I think I wrongfully assumed $prefix/lib/pythonX.Y/config contained a shared python library in addition to the static one. It seems that was an Ubuntu specific thing :| I'll take a good look and fix this within a couple of days... ---------------------------------------------------------------------- Comment By: Marien Zwart (marienz) Date: 2006-11-22 14:02 Message: Logged In: YES user_id=857292 Originator: YES I can reproduce this by using either gentoo's python 2.5 or one I installed temporarily with ./configure --enable-shared --prefix $HOME/tmp/pytem, using a trivial distutils extension (I used http://dev.gentooexperimental.org/~marienz/ext.c and http://dev.gentooexperimental.org/~marienz/setup.py for testing). The relevant command that is run is: gcc -pthread -shared build/temp.linux-i686-2.5/ext.o -L/home/marienz/tmp/pytem/lib/python2.5/config -lpython2.5 -o build/lib.linux-i686-2.5/ext.so for the manually-configured python and something similar for gentoo's python. The code doing the adding was added by r45232 in svn. From the diff (svn di -r45231:45232 http://svn.python.org/projects/python/trunk/Lib/distutils/command/build_ext.py) with some extra context added: - if sys.platform[:6] == 'cygwin' or sys.platform[:6] == 'atheos': + if sys.platform[:6] == 'cygwin' or sys.platform[:6] == 'atheos' or \ + (sys.platform.startswith('linux') and + sysconfig.get_config_var('Py_ENABLE_SHARED')): if string.find(sys.executable, sys.exec_prefix) != -1: # building third party extensions self.library_dirs.append(os.path.join(sys.prefix, "lib", "python" + get_python_version(), "config")) (that is around line 188 of Lib/distutils/command/build_ext.py) sys.platform on this host is linux2 and as far as I can tell Py_ENABLE_SHARED is true if --enable-shared is passed to configure. If you need any more information please ask. ---------------------------------------------------------------------- Comment By: Martin v. Löwis (loewis) Date: 2006-11-22 08:09 Message: Logged In: YES user_id=21627 Originator: NO I can't reproduce the problem. Why do you think -L$PREFIX/lib/python2.5/config is added to the link command line? AFAICT, it never is. What operating system are you using? ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1600860&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
