NB Sorry for a lengthy reply -- more like notes for myself I guess ;)
Short story -- imp.get_suffixes()[0] != get_config_var('SO')
on Debian multiarch sid
Perspective patch is at the bottom.
On Wed, 25 Jul 2012, Stefan Behnel wrote:
> > anything familiar? (I see PY3 fix bf7981fb37b19f08a331c704df8bf25d3b299be5
> > but
> > it doesn't look relevant for this one, or am I wrong?)
> No, I haven't seen this before.
cool -- I am glad then to bring the freshiest stuff to the table ;)
> > ImportError:
> > /tmp/cython_inline_zo_0tz/_cython_inline_d0fe156ce72658e73c2b9a9438fd8d6a.cpython-32mu-x86_64-linux-gnu.so:
> > cannot open shared object file: No such file or directory
> That's weird, and I don't think this is Cython's fault. According to the
> logs, the shared library file that it built is called
> _cython_inline_d0fe156ce72658e73c2b9a9438fd8d6a.cpython-32mu.so
> i.e. the "cpython-32mu-x86_64-linux-gnu" should be "cpython-32mu".
Thanks for the analysis! Additional suffix comes from
$> cc --print-multiarch
x86_64-linux-gnu
for multiarch Debian support
> The module path that Cython tries (and fails) to load the module from is
> built like this in the code:
> """
> so_ext = [ ext for ext,_,mod_type in imp.get_suffixes()
> if mod_type == imp.C_EXTENSION ][0]
just a note: [0] -- so only the first possible one is considered
> So, apparently, imp.get_suffixes() returns an unexpected result here. Could
> you figure out what exactly that function returns in your Py3.2 build
> environment?
here it is in my local environment:
$> python3 -c 'import imp; print(imp.get_suffixes())'
[('.cpython-32mu.so', 'rb', 3), ('module.cpython-32mu.so', 'rb', 3),
('.abi3.so', 'rb', 3), ('module.abi3.so', 'rb', 3), ('.so', 'rb', 3),
('module.so', 'rb', 3), ('.py', 'U', 1), ('.pyc', 'rb', 2)]
BUT it is with python 3.2.3-2 while sid (the build environment) was with
up-to-date python 3.2.3-3, which according to
http://packages.debian.org/changelogs/pool/main/p/python3.2/python3.2_3.2.3-3/changelog
did:
* Lookup extension modules with a multiarch suffix too.
updated my local env to match the build env:
$> python3 -c 'import imp; print(imp.get_suffixes())'
[('.cpython-32mu-x86_64-linux-gnu.so', 'rb', 3), ('.cpython-32mu.so', 'rb',
3), ('module.cpython-32mu-x86_64-linux-gnu.so', 'rb', 3),
('module.cpython-32mu.so', 'rb', 3), ('.abi3.so', 'rb', 3), ('module.abi3.so',
'rb', 3), ('.so', 'rb', 3), ('module.so', 'rb', 3), ('.py', 'U', 1), ('.pyc',
'rb', 2)]
so here we get it ;):
(gdb) py-down
#3 Frame 0x2814760, for file
/home/yoh/deb/gits/cython/build/work-dir/Cy3/Cython/Build/Inline.py, line 194,
in cython_inline (code='return global_value + 1', get_type=<function at remote
0x260b4b0>, lib_dir='/home/yoh/.tmp/cython_inline_mr_ml9',
cython_include_dirs=['.'], force=True, quiet=True, locals={'self':
<TestInline(_outcomeForDoCleanups=<_Outcome(unexpectedSuccess=None, errors=[],
success=True, expectedFailure=None, skipped=None, failures=[]) at remote
0x297d290>, _testMethodName='test_globals', test_kwds={'lib_dir':
'/home/yoh/.tmp/cython_inline_mr_ml9', 'force': True, 'quiet': True},
_cleanups=[], _type_equality_funcs={<type at remote 0x9aac20>:
'assertDictEqual', <type at remote 0x8a54a0>: 'assertMultiLineEqual', <type at
remote 0x89fb60>: 'assertTupleEqual', <type at remote 0x89ebc0>:
'assertSetEqual', <type at remote 0x89f0a0>: 'assertSetEqual', <type at remote
0x9a8de0>: 'assertListEqual'}, listing_file=None, _testMethodDoc=None,
echo_file=None) at remote 0x260cfb0>
}, globals={'CythonTest': <type a...(truncated)
module = imp.load_dynamic(module_name, module_path)
(gdb) py-print module_name
local 'module_name' = '_cython_inline_7bc6bab54c5c46dc2ccbec2dc048aa42'
(gdb) py-print module_path
local 'module_path' =
'/home/yoh/.tmp/cython_inline_mr_ml9/_cython_inline_7bc6bab54c5c46dc2ccbec2dc048aa42.cpython-32dmu-x86_64-linux-gnu.so'
while there is only:
$> ls -l
/home/yoh/.tmp/cython_inline_mr_ml9/_cython_inline_7bc6bab54c5c46dc2ccbec2dc048aa42.cpython-32dmu*.so
-rwx------ 1 yoh yoh 49027 Jul 25 14:22
/home/yoh/.tmp/cython_inline_mr_ml9/_cython_inline_7bc6bab54c5c46dc2ccbec2dc048aa42.cpython-32dmu.so*
So -- there is a dichotomy between what is the first in the list of
imp.get_suffixes() and what is the default extension filename from build_ext
which is based on
(Pdb) from distutils.sysconfig import get_config_var
(Pdb) get_config_var('SO')
'.cpython-32dmu.so'
used by .get_ext_filename():
(Pdb) print build_extension.get_ext_filename(module_name)
'_cython_inline_7bc6bab54c5c46dc2ccbec2dc048aa42.cpython-32dmu.so'
So I wonder, wouldn't it be reasonable (i.e. more robust) in cython_inline to
instantiate first build_extension and seek full name for the resultant
extension from it? That should eliminate any possibility to get different
names.
e.g. smth like:
$> quilt diff
--- a/Cython/Build/Inline.py
+++ b/Cython/Build/Inline.py
@@ -139,8 +139,15 @@ def cython_inline(code,
key = orig_code, arg_sigs, sys.version_info, sys.executable,
Cython.__version__
module_name = "_cython_inline_" +
hashlib.md5(str(key).encode('utf-8')).hexdigest()
- so_ext = [ ext for ext,_,mod_type in imp.get_suffixes() if mod_type ==
imp.C_EXTENSION ][0]
- module_path = os.path.join(lib_dir, module_name+so_ext)
+ dist = Distribution()
+ # Ensure the build respects distutils configuration by parsing
+ # the configuration files
+ config_files = dist.find_config_files()
+ dist.parse_config_files(config_files)
+ build_extension = build_ext(dist)
+ build_extension.finalize_options()
+
+ module_path = os.path.join(lib_dir,
build_extension.get_ext_filename(module_name))
if not os.path.exists(lib_dir):
os.makedirs(lib_dir)
@@ -178,13 +185,6 @@ def __invoke(%(params)s):
sources = [pyx_file],
include_dirs = c_include_dirs,
extra_compile_args = cflags)
- dist = Distribution()
- # Ensure the build respects distutils configuration by parsing
- # the configuration files
- config_files = dist.find_config_files()
- dist.parse_config_files(config_files)
- build_extension = build_ext(dist)
- build_extension.finalize_options()
build_extension.extensions = cythonize([extension], ctx=ctx,
quiet=quiet)
build_extension.build_temp = os.path.dirname(pyx_file)
build_extension.build_lib = lib_dir
--
Yaroslav O. Halchenko
Postdoctoral Fellow, Department of Psychological and Brain Sciences
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834 Fax: +1 (603) 646-1419
WWW: http://www.linkedin.com/in/yarik
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