Re: [Swig-user] undefined reference problem

[Victor W. T. K. <vi...@it...>]

Hi,

  I can't compile with -shared, though.  I get the following error message
if I specify both -shared and -fPIC:

===================================
 g++ -shared -fPIC Complex_wrap.o -o _Complex.so
/usr/bin/ld: Complex_wrap.o: relocation R_X86_64_32S against `a local
symbol' can not be used when making a shared object; recompile with -fPIC
Complex_wrap.o: could not read symbols: Bad value
collect2: ld returned 1 exit status
===================================

  If I specify just -fPIC, then I get all errors of the following type:

=================================
/usr/lib/gcc/x86_64-redhat-linux/3.4.3/../../../../lib64/crt1.o(.text+0x21):
In function `_start':
: undefined reference to `main'
Complex_wrap.o(.text+0xb92): In function `SWIG_Python_ErrorType(int)':
: undefined reference to `PyExc_MemoryError'
Complex_wrap.o(.text+0xba2): In function `SWIG_Python_ErrorType(int)':
: undefined reference to `PyExc_IOError'
Complex_wrap.o(.text+0xbb2): In function `SWIG_Python_ErrorType(int)':
: undefined reference to `PyExc_RuntimeError'
Complex_wrap.o(.text+0xbbf): In function `SWIG_Python_ErrorType(int)':
: undefined reference to `PyExc_IndexError'
=================================

  And so on.  Any ideas?

- Victor




On Tue, 28 Mar 2006, Marcelo Matus wrote:

> Sorry, I though you were using your python module from a separated main
> program.
> But it seems you are just loading it as a normal module, then you just
> need to be sure
> to create a 'shared' object. Keep the -shared object when you create the
> .so file, and
> add -fPIC to the compilation stage.
>
> Marcelo
>
> Victor Wai Tak Kam wrote:
>
> >How do I link against the python library?  For some reason I didn't have
> >to do that on the 32 bit machine, maybe thanks to global flags.  Thanks!
> >
> >- Victor
> >
> >
> >On Mon, 27 Mar 2006, Marcelo Matus wrote:
> >
> >
> >
> >>Check what python versions are you using and be sure you link against
> >>the python
> >>library in both cases.
> >>
> >>Marcelo
> >>
> >>
> >>Victor Wai Tak Kam wrote:
> >>
> >>
> >>
> >>>Hi all,
> >>>
> >>> I'm having trouble compiling something that works fine on a 32 bit
> >>>machine onto a 64 bit machine, with error messages of the following sort:
> >>>
> >>>=========================================
> >>>build/temp.linux-x86_64-2.3/Py_Scream_EE_wrap.o(.gnu.linkonce.t._ZN4swig19traits_asptr_stdseqISt3mapISsiSt4lessISsESaISt4pairIKSsiEEES4_ISsiEE5asptrEP7_objectPPS8_+0x5a1)
> >>>:/projects/Biogroup/SCREAM/SCREAM/swig/python/Py_Scream_EE_wrap.cpp:2373:
> >>>undefined reference to `PySequence_Size'
> >>>=========================================
> >>>
> >>> I only included one line of the undefined references, but where
> >>>"PySequence_Size" is, it also happens for PyExc_TypeError, PyExc_Format,
> >>>etc.  I'm using swig 1.3.29 on the 64 bit machine, and am using the exact
> >>>same compiler options as the 32 bit machine except I changed -shared to
> >>>-fPIC.  I also checked that the python version is compiled for the 64 bit
> >>>architecture.
> >>>
> >>> Does anybody know how to resolve this problem?  I'm suspecting I may
> >>>need to explicitly link to some 64 bit library for some swigged python
> >>>stuff but I don't know where and which files to look for.  Thanks in
> >>>advance!
> >>>
> >>>- Victor
> >>>
> >>>
> >>>
> >>>"I must say I am slightly disappointed.  I did not bring my flock of sheep
> >>>in the hope I could shepherd them across London Bridge."
> >>>
> >>>Alan Greenspan, made a Freeman of the City of London, an award bestowing
> >>>on him certain ancient privileges including the right to take sheep
> >>>through the city
> >>>
> >>>
> >>>
> >>>"If you have to cut down a tree on private land, gnaw the stump so that it
> >>>will appear that a beaver did it."
> >>>
> >>>-- From the Canada Committee on Ecological (Bio-Physical) Land
> >>>Classification, Newsletter, No 5, 1978.
> >>>
> >>>
> >>>________________________________________________________________________
> >>>Victor Kam                       |
> >>>Department of Chemistry          |       vi...@ca...
> >>>MC 139-74                        |       phone  #626-644-5947
> >>>California Institute of Tech.    |              #626-395-2440
> >>>Pasadena, CA 91125               |
> >>>________________________________________________________________________
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>-------------------------------------------------------
> >>>This SF.Net email is sponsored by xPML, a groundbreaking scripting language
> >>>that extends applications into web and mobile media. Attend the live webcast
> >>>and join the prime developer group breaking into this new coding territory!
> >>>http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
> >>>_______________________________________________
> >>>Swig-user mailing list
> >>>Swi...@li...
> >>>https://lists.sourceforge.net/lists/listinfo/swig-user
> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >
> >
> >-------------------------------------------------------
> >This SF.Net email is sponsored by xPML, a groundbreaking scripting language
> >that extends applications into web and mobile media. Attend the live webcast
> >and join the prime developer group breaking into this new coding territory!
> >http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
> >_______________________________________________
> >Swig-user mailing list
> >Swi...@li...
> >https://lists.sourceforge.net/lists/listinfo/swig-user
> >
> >
>
>