[PyQt] Symbol not found: _sipQtConnect (Qt5 and PyQt 4.10 on OSX, 32 bit)

[Glenn Ramsey]

On 15/03/13 22:07, Phil Thompson wrote:
> On Fri, 15 Mar 2013 15:51:00 +1300, Glenn Ramsey <gr at componic.co.nz>
> wrote:
>> Hi,
>>
>> I have built a 32 bit version of PyQt on OSX (10.8.2) using Qt5, but it
>> doesn't
>> work:
>>
>> Python 2.7.3 (default, Feb 26 2013, 11:03:37)
>> [GCC 4.2.1 Compatible Apple Clang 4.0 ((tags/Apple/clang-421.0.60))] on
>> darwin
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> import PyQt4.QtCore
>> Traceback (most recent call last):
>>     File "<stdin>", line 1, in <module>
>> ImportError:
>>
> dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyQt4/QtCore.so,
>> 2): Symbol not found: _sipQtConnect
>>     Referenced from:
>>
> /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyQt4/QtCore.so
>>     Expected in: flat namespace
>>    in
>>
> /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyQt4/QtCore.so
>>
>> Is there a workaround for this issue?
>>
>> My setup:
>>
>> I'm using the git version of qt5 (5.0.x), because there is a bug in
> 5.0.1
>> that
>> prevents 32 bit builds on OSX, with the following config.
>> ./configure -platform macx-clang-32 -nomake docs -nomake examples
> -nomake
>> demos
>> -nomake tests  -nomake webkit -opensource -confirm-license -release
>> -no-c++11
>>
>> sip 4.14.4
>> python configure.py --arch i386
>>
>> PyQt 4.10 (commercial)
>> python configure.py --use-arch i386
>>
>> I had to change qt_macx_spec in configure.py to get it work:
>> #qt_macx_spec = 'macx-g++'
>> qt_macx_spec = 'macx-clang-32'
>>
>> The python version is 2.7 from MacPorts, built as 32 bit.
>>
>> I have also rebuilt both sip and PyQt4 after doing a "make clean".
>>
>> Glenn
>
> You are doing a few things which, at best, are untested.
>
> Can you "import sip"?

yes, that works fine:

Python 2.7.3 (default, Feb 26 2013, 11:03:37)
[GCC 4.2.1 Compatible Apple Clang 4.0 ((tags/Apple/clang-421.0.60))] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> import sip
 >>> dir(sip)
['SIP_VERSION', 'SIP_VERSION_STR', '_C_API', '__doc__', '__file__', '__name__', 
'__package__', '_unpickle_enum', '_unpickle_type', 'cast', 'delete', 'dump', 
'getapi', 'isdeleted', 'ispycreated', 'ispyowned', 'setapi', 'setdeleted', 
'setdestroyonexit', 'settracemask', 'simplewrapper', 'transferback', 
'transferto', 'unwrapinstance', 'voidptr', 'wrapinstance', 'wrapper', 'wrappertype']
 >>> print sip.SIP_VERSION_STR
4.14.4

>
> There may be an issue building sip with macx-g++ and PyQt with
> macx-clang-32.

Even though the spec is macx-g++ sip actually builds using the system cc and 
c++, which are symlinks to clang and clang++ so they are both being built by the 
clang compiler.

sip-4.14.4$ python configure.py --arch=i386
This is SIP 4.14.4 for Python 2.7.3 on darwin.
The SIP code generator will be installed in
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin.
The sip module will be installed in
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages.
The sip.h header file will be installed in
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7.
The default directory to install .sip files in is
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/share/sip.
The platform/compiler configuration is macx-g++.
MacOS/X binaries will be created for i386.
Creating siplib/sip.h...
Creating siplib/siplib.c...
Creating siplib/siplib.sbf...
Creating sipconfig.py...
Creating top level Makefile...
Creating sip code generator Makefile...
Creating sip module Makefile...
sip-4.14.4$ make
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o main.o main.c
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o transform.o transform.c
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o gencode.o gencode.c
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o extracts.o extracts.c
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o export.o export.c
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o heap.o heap.c
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o parser.o parser.c
cc -c -pipe -arch i386 -Os -w -DNDEBUG -I. -o lexer.o lexer.c
c++ -headerpad_max_install_names -arch i386 -o sip main.o transform.o gencode.o 
extracts.o export.o heap.o parser.o lexer.o
cc -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o siplib.o siplib.c
cc -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o apiversions.o apiversions.c
cc -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o descriptors.o descriptors.c
cc -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o qtlib.o qtlib.c
cc -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o threads.o threads.c
cc -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o objmap.o objmap.c
cc -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o voidptr.o voidptr.c
c++ -c -pipe -fPIC -arch i386 -Os -w -DNDEBUG -I. 
-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 
-o bool.o bool.cpp
c++ -headerpad_max_install_names -bundle -undefined dynamic_lookup -arch i386 -o 
sip.so siplib.o apiversions.o descriptors.o qtlib.o threads.o objmap.o voidptr.o 
bool.o

>  From previous experience I don't trust MacPorts stuff.

It was all working fine with Qt 4.8.4/PyQt4.9.5, but there is an issue with 
4.8.4 on OSX 10.6 that prompted us attempt to move to Qt 5.

What alternatives do I have given that I need a 32 bit build (due to some 3rd 
party code that isn't yet 64 bit compatible)?

Glenn