Re: Some problems with the ctypes-python-bindings branch

On Tue, Jul 1, 2008 at 12:54 PM, Arfrever Frehtes Taifersar Arahesis
<arfrever.fta_at_gmail.com> wrote:
> I tried to build ctypes Python bindings, but I got some errors.
>
> $ python autogen.py
> cd /tmp/tmpWGmhA9 && /usr/bin/python /home/Arfrever/ctypesgen_trunk/wrap.py --cpp 'i686-pc-linux-gnu-gcc -E -I/usr/include/apr-1 -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -I/usr/include/apr-1 -I/usr/include/db4.7 -I/usr/include/subversion-1' -L/usr/lib -lapr-1 -L/usr/lib -L/usr/lib -laprutil-1 -lsvn_subr-1 -lsvn_diff-1 -lsvn_delta-1 -lsvn_fs-1 -lsvn_repos-1 -lsvn_wc-1 -lsvn_ra-1 -lsvn_client-1 /usr/include/subversion-1/svn_*.h /usr/include/apr-1/ap[ru]_*.h -o svn_all.py
> /home/Arfrever/ctypesgen_trunk/ctypesgencore/parser/yacc.py:72: DeprecationWarning: the md5 module is deprecated; use hashlib instead
> import re, types, sys, cStringIO, md5, os.path
> /home/Arfrever/ctypesgen_trunk/ctypesgencore/parser/preprocessor.py:13: DeprecationWarning: The popen2 module is deprecated. Use the subprocess module.
> import os, re, shlex, sys, tokenize, lex, yacc, traceback, popen2
> Traceback (most recent call last):
> File "/home/Arfrever/ctypesgen_trunk/wrap.py", line 36, in <module>
> import ctypesgencore
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/__init__.py", line 52, in <module>
> import processor
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/processor/__init__.py", line 12, in <module>
> from pipeline import process
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/processor/pipeline.py", line 4, in <module>
> from ctypesgencore.processor.operations import *
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/processor/operations.py", line 12, in <module>
> import ctypesgencore.libraryloader
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/libraryloader.py", line 226, in <module>
> loader = loaderclass[sys.platform]()
> KeyError: 'linux2'
> $
>
> I applied the attached patch (ctypesgen-libraryloader.py.patch) to ctypesgen
> and I tried to build ctypes Python bindings again.
>
> $ python autogen.py
> cd /tmp/tmpTAKs1q && /usr/bin/python /home/Arfrever/ctypesgen_trunk/wrap.py --cpp 'i686-pc-linux-gnu-gcc -E -I/usr/include/apr-1 -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -I/usr/include/apr-1 -I/usr/include/db4.7 -I/usr/include/subversion-1' -L/usr/lib -lapr-1 -L/usr/lib -L/usr/lib -laprutil-1 -lsvn_subr-1 -lsvn_diff-1 -lsvn_delta-1 -lsvn_fs-1 -lsvn_repos-1 -lsvn_wc-1 -lsvn_ra-1 -lsvn_client-1 /usr/include/subversion-1/svn_*.h /usr/include/apr-1/ap[ru]_*.h -o svn_all.py
> /home/Arfrever/ctypesgen_trunk/ctypesgencore/parser/yacc.py:72: DeprecationWarning: the md5 module is deprecated; use hashlib instead
> import re, types, sys, cStringIO, md5, os.path
> /home/Arfrever/ctypesgen_trunk/ctypesgencore/parser/preprocessor.py:13: DeprecationWarning: The popen2 module is deprecated. Use the subprocess module.
> import os, re, shlex, sys, tokenize, lex, yacc, traceback, popen2
> Status: Preprocessing /tmp/tmpdmsAj6.h
> Status: i686-pc-linux-gnu-gcc -E -I/usr/include/apr-1 -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -I/usr/include/apr-1 -I/usr/include/db4.7 -I/usr/include/subversion-1 -U __GNUC__ -dD "-Dinline=" "-D__inline__=" "-D__extension__=" "-D_Bool=uint8_t" "-D__const=const" "-D__asm__(x)=" "-D__asm(x)=" "-Dwith=with_" /tmp/tmpdmsAj6.h
> Status: Parsing /tmp/tmpdmsAj6.h
> Error: /usr/include/asm/types.h:16: Syntax error at 'short'
> Error: /usr/include/subversion-1/svn_iter.h:40: Syntax error at 'svn_iter_apr_hash_cb_t'
> Error: /usr/include/subversion-1/svn_iter.h:42: Syntax error at 'apr_ssize_t'
> Error: /usr/include/subversion-1/svn_iter.h:43: Syntax error at 'apr_pool_t'
> Error: /usr/include/subversion-1/svn_iter.h:77: Syntax error at 'svn_iter_apr_array_cb_t'
> Error: /usr/include/subversion-1/svn_iter.h:79: Syntax error at 'apr_pool_t'
> Error: /usr/include/lber.h:61: Syntax error at '\n'
> Status: Processing description list.
> Traceback (most recent call last):
> File "/home/Arfrever/ctypesgen_trunk/wrap.py", line 132, in <module>
> ctypesgencore.processor.process(descriptions,options)
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/processor/pipeline.py", line 47, in process
> find_source_libraries(data,options)
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/processor/operations.py", line 180, in find_source_libraries
> library=ctypesgencore.libraryloader.load_library(library_name)
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/libraryloader.py", line 53, in load_library
> for path in paths:
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/libraryloader.py", line 80, in getpaths
> for path in self.getplatformpaths(libname):
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/libraryloader.py", line 186, in getplatformpaths
> self._create_ld_so_cache()
> File "/home/Arfrever/ctypesgen_trunk/ctypesgencore/libraryloader.py", line 148, in _create_ld_so_cache
> directories = self.other_paths.copy()
> AttributeError: 'LinuxLibraryLoader' object has no attribute 'other_paths'
> $

Hi Arfever,

I get the same error on my (Linux) box as well. It looks like this
error is new in r47 of ctypesgen because the ctypes python bindings
build fine on my machine with r46.

Changing "linux" to "linux2" and replacing "self.other_paths.copy()"
with "self.other_dirs[:]" in ctypesgencore/libraryloader.py seems to
fix the compile problem. Tim, is this the right solution? I've
attached the complete patch (including Arfrever's changes) as
libraryloader-patch.txt.

Unfortunately, after running ctypesgen on the new version, I still get
errors in the csvn test suite because NULL is defined as 0 instead of
None. (ctypesgen got this from /usr/include/linux/stddef.h). Should
ctypesgen override this with NULL = None? Python doesn't treat "0" as
a NULL pointer.

Cheers,

David

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