[redland-dev] Re: Compiling Python binding on OSX

Mon Aug 6 14:37:51 BST 2007

	Hello,

>>     I'm trying to compile the Python bindings for librdf on my OSX  
>> box (10.4.10). Is there somebody that tried that already? I get a  
>> linking error but I can't figure out how to correct it (compiling  
>> librdf itself already was a pain due to a bug for the version  
>> detection of flex).
>
> Could you say more about that?

	Sure; for both raptor and rasql the configure file compares Flex  
versions by creating and comparing an hash value. For a version X.Y.Z  
for example, the hash is X * 10000 + Y * 100 + Z. So the required  
version of Flex, 2.5.19, will gives 20519. Fine. But the problem is  
that my version of Flex, 2.5.4, albeit being newer, will give 20504,  
which is less than the previous value ... So my Flex is considered  
outdated while it's not. I had to modify the configure.ac files in  
both raptor/ and rasqal/ subdirectories to force them to accept it. A  
solution would be to pad the Z part of the version to 2 numbers for  
example, by appending zeroes.

>> What's weird is that the log show no reference to the Python  
>> framework and libraries I have. Maybe it's the problem?
>
> Clearly the question is - where did you install redland/raptor/ 
> rasqal ? It's not in the default library search path that is used.  
> It's also not in the path that `redland-config --libs` prints. Once  
> you figure out why that's the case, it should work.

	Well, I just ran (for redland-1.0.6) 'autogen.sh' then 'configure'  
then 'make', 'make check' and 'make install', without any parameter.  
So I guess the default compilation values are used? I know redland- 
config and roqet, for example, are installed in /usr/local/bin/.  
Running 'redland-config --libs' return "-L/usr/local/lib -lrdf". And  
the /usr/local/lib indeed contains a bunch of librdf.*, librasqal.*  
and libraptor.* files. Looks like everything is there?

	I'm not expert but it looks like the problem is not accessing the  
previously install librdf library -- it's accessing the Python  
library. The 'undefined symbols' found sounds all related to python,  
or maybe the librdf / python binding. I re-ran the installation  
process of both redland-1.0.6 and redland-bindings-1.0.6. For the  
bindings I again ran './autogen.sh' then './configure --with-python=/ 
sw/bin/python', and once in the python/ subdirectory, I tried 'make'.  
Interestingly the log is slightly different, albeit ending the same.  
Again, here is an excerpt:

Making all in test
make[1]: Nothing to be done for `all'.
gcc -DPACKAGE_NAME=\"Redland\ RDF\ Application\ Framework\ bindings\"  
-DPACKAGE_TARNAME=\"redland-bindings\" -DPACKAGE_VERSION=\"1.0.6.1\" - 
DPACKAGE_STRING=\"Redland\ RDF\ Application\ Framework\ bindings\  
1.0.6.1\" -DPACKAGE_BUGREPORT=\"http://bugs.librdf.org/\" -DPACKAGE= 
\"redland-bindings\" -DVERSION=\"1.0.6.1\" -DSTDC_HEADERS=1 - 
DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 - 
DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 - 
DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 - 
DHAVE_DLFCN_H=1 -I. -DREDLAND_POST_I -DREDLAND_DECL_I - 
DREDLAND_TYPEMAP_I   -I/usr/local/include -I/usr/local/include -I/usr/ 
local/include -I/sw/include/python2.5 -DSWIG_PYTHON_SILENT_MEMLEAK  - 
g -O2  -I/usr/local/include -I/usr/local/include -I/usr/local/ 
include  -DSWIG_PYTHON_SILENT_MEMLEAK -g -O2 -fPIC -DPIC ./ 
Redland_wrap.c -c -o Redland_wrap.so
In file included from ./Redland_wrap.c:2521:
./redland-post.i: In function 'librdf_python_unicode_to_bytes':
./redland-post.i:161: warning: pointer targets in passing argument 2  
of 'raptor_unicode_char_to_utf8' differ in signedness
./Redland_wrap.c: In function '_wrap_librdf_digest_update':
./Redland_wrap.c:3017: warning: pointer targets in passing argument 2  
of 'librdf_digest_update' differ in signedness
./Redland_wrap.c: In function '_wrap_librdf_digest_update_string':
./Redland_wrap.c:3063: warning: pointer targets in passing argument 2  
of 'librdf_digest_update_string' differ in signedness
./Redland_wrap.c: In function '_wrap_librdf_new_uri':
./Redland_wrap.c:3730: warning: pointer targets in passing argument 2  
of 'librdf_new_uri' differ in signedness
./Redland_wrap.c: In function '_wrap_librdf_new_node_from_uri_string':
./Redland_wrap.c:4008: warning: pointer targets in passing argument 2  
of 'librdf_new_node_from_uri_string' differ in signedness
./Redland_wrap.c: In function '_wrap_librdf_new_node_from_literal':
./Redland_wrap.c:4122: warning: pointer targets in passing argument 2  
of 'librdf_new_node_from_literal' differ in signedness
./Redland_wrap.c: In function  
'_wrap_librdf_new_node_from_typed_literal':
./Redland_wrap.c:4194: warning: pointer targets in passing argument 2  
of 'librdf_new_node_from_typed_literal' differ in signedness
./Redland_wrap.c: In function  
'_wrap_librdf_new_node_from_blank_identifier':
./Redland_wrap.c:4280: warning: pointer targets in passing argument 2  
of 'librdf_new_node_from_blank_identifier' differ in signedness
./Redland_wrap.c: In function  
'_wrap_librdf_model_add_typed_literal_statement':
./Redland_wrap.c:5662: warning: pointer targets in passing argument 4  
of 'librdf_model_add_typed_literal_statement' differ in signedness
./Redland_wrap.c: In function  
'_wrap_librdf_parser_parse_string_as_stream':
./Redland_wrap.c:7674: warning: pointer targets in passing argument 2  
of 'librdf_parser_parse_string_as_stream' differ in signedness
./Redland_wrap.c: In function  
'_wrap_librdf_parser_parse_string_into_model':
./Redland_wrap.c:7739: warning: pointer targets in passing argument 2  
of 'librdf_parser_parse_string_into_model' differ in signedness
./Redland_wrap.c: In function  
'_wrap_librdf_parser_parse_counted_string_as_stream':
./Redland_wrap.c:7804: warning: pointer targets in passing argument 2  
of 'librdf_parser_parse_counted_string_as_stream' differ in signedness
./Redland_wrap.c: In function  
'_wrap_librdf_parser_parse_counted_string_into_model':
./Redland_wrap.c:7878: warning: pointer targets in passing argument 2  
of 'librdf_parser_parse_counted_string_into_model' differ in signedness
./Redland_wrap.c: In function '_wrap_librdf_parser_guess_name':
./Redland_wrap.c:8033: warning: pointer targets in passing argument 2  
of 'librdf_parser_guess_name' differ in signedness
./Redland_wrap.c:8033: warning: pointer targets in passing argument 3  
of 'librdf_parser_guess_name' differ in signedness
./Redland_wrap.c: In function '_wrap_librdf_new_query':
./Redland_wrap.c:8235: warning: pointer targets in passing argument 4  
of 'librdf_new_query' differ in signedness
gcc -g -O2  -I/usr/local/include -I/usr/local/include -I/usr/local/ 
include  -DSWIG_PYTHON_SILENT_MEMLEAK -g -O2   -Wl,-F. -Wl,-F. - 
bundle Redland_wrap.so `redland-config --libs` -o Redland.so
/usr/bin/ld: Undefined symbols:
_PyArg_ParseTuple
_PyArg_UnpackTuple
_PyBool_FromLong
_PyCObject_FromVoidPtr
_PyCObject_Import

... lines cut here ...

_raptor_locator_byte
_raptor_locator_column
_raptor_locator_file
_raptor_locator_line
_raptor_locator_uri
_raptor_unicode_char_to_utf8
_raptor_version_decimal
_raptor_version_major
_raptor_version_minor
_raptor_version_release
_raptor_version_string
_rasqal_version_decimal
_rasqal_version_major
_rasqal_version_minor
_rasqal_version_release
_rasqal_version_string
collect2: ld returned 1 exit status
make[1]: *** [Redland-stamp] Error 1
make: *** [all-recursive] Error 1

> For what it is worth, I develop on Linux and OSX and check things  
> work on both.  Since sourceforge abandoned helping open source  
> devels in this are, there are no other compile farms with a variety  
> of systems available.

	Too bad :-\ Well, let's hope it's a problem from my side, and not  
some incompatibility with OSX.

	Thanks again,

	Aurelien