[ python-Bugs-1600860 ] --enable-shared links extensions to libpython statically
Bugs item #1600860, was opened at 2006-11-22 00:29
Message generated for change (Comment added) made by gustavo
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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: Gustavo J. A. M. Carneiro (gustavo)
Date: 2006-11-25 13:10
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*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 20:47
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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 13:02
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I can reproduce this by using either gentoo's python 2.5 or one I
installed temporarily with ./configure --enable-shared --prefix
$HOME/tmp/pytem, using a trivial distutils extension (I used
http://dev.gentooexperimental.org/~marienz/ext.c and
http://dev.gentooexperimental.org/~marienz/setup.py for testing). The
relevant command that is run is:
gcc -pthread -shared build/temp.linux-i686-2.5/ext.o
-L/home/marienz/tmp/pytem/lib/python2.5/config -lpython2.5 -o
build/lib.linux-i686-2.5/ext.so
for the manually-configured python and something similar for gentoo's
python. The code doing the adding was added by r45232 in svn. From the
diff (svn di -r45231:45232
http://svn.python.org/projects/python/trunk/Lib/distutils/command/build_ext.py)
with some extra context added:
-if sys.platform[:6] == 'cygwin' or sys.platform[:6] == 'atheos':
+if sys.platform[:6] == 'cygwin' or sys.platform[:6] == 'atheos'
or \
+ (sys.platform.startswith('linux') and
+sysconfig.get_config_var('Py_ENABLE_SHARED')):
if string.find(sys.executable, sys.exec_prefix) != -1:
# building third party extensions
self.library_dirs.append(os.path.join(sys.prefix, "lib",
"python" +
get_python_version(),
"config"))
(that is around line 188 of Lib/distutils/command/build_ext.py)
sys.platform on this host is linux2 and as far as I can tell
Py_ENABLE_SHARED is true if --enable-shared is passed to configure.
If you need any more information please ask.
--
Comment By: Martin v. Löwis (loewis)
Date: 2006-11-22 07:09
Message:
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I can't reproduce the problem. Why do you think
-L$PREFIX/lib/python2.5/config is added to the link command line? AFAICT,
it never is.
What operating system are you using?
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[ python-Bugs-1600860 ] --enable-shared links extensions to libpython statically
Bugs item #1600860, was opened at 2006-11-22 01:29
Message generated for change (Comment added) made by loewis
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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: 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?
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[ python-Bugs-1602742 ] itemconfigure returns incorrect text property of text items
Bugs item #1602742, was opened at 2006-11-25 17:27
Message generated for change (Tracker Item Submitted) made by Item Submitter
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Category: Tkinter
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Wojciech Mula (wmula)
Assigned to: Martin v. Löwis (loewis)
Summary: itemconfigure returns incorrect text property of text items
Initial Comment:
Tkinter: canvas itemconfigure bug
Consider following code:
-- tkbug.py ---
from Tkinter import *
root = Tk()
canvas = Canvas(root)
text = "sample text with spaces"
id = canvas.create_text(0, 0, text=text)
text2 = canvas.itemconfigure(id)['text'][-1]
print text
print text2
--- eof ---
This toy prints:
sample text with spaces
('sample', 'text', 'with', 'spaces')
The returned value is not a string -- Tk returns the same
string as passed on creating item, but Tkinter split it.
To fix this problem, internal method '_configure' have
to be changed a bit:
*** Tkinter.py.old 2006-11-20 16:48:27.0 +0100
--- Tkinter.py 2006-11-20 17:00:13.0 +0100
***
*** 1122,1129
cnf = _cnfmerge(cnf)
if cnf is None:
cnf = {}
! for x in self.tk.split(
self.tk.call(_flatten((self._w, cmd:
cnf[x[0][1:]] = (x[0][1:],) + x[1:]
return cnf
if type(cnf) is StringType:
--- 1122,1134
cnf = _cnfmerge(cnf)
if cnf is None:
cnf = {}
! for x in self.tk.splitlist(
self.tk.call(_flatten((self._w, cmd:
+ if type(x) is StringType:
+ if x.startswith('-text '):
+ x = self.tk.splitlist(x)
+ else:
+ x = self.tk.split(x)
cnf[x[0][1:]] = (x[0][1:],) + x[1:]
return cnf
if type(cnf) is StringType:
Maybe better/faster way is to provide Canvas method, that
return a 'text' property for text items:
---
def get_text(self, text_id):
try:
r = self.tk.call(self._w, 'itemconfigure', text_id, '-text')
return self.tk.splitlist(r)[-1]
except TclError:
return ''
---
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