Max Mayzel wrote:
> Dag Sverre Seljebotn <da...@...> writes:
>
>
>> Max wrote:
>>
>>> Hi,
>>> I'm trying to run testlapack example from cython-notur09 on OS X 10.6.
>>> First, while compiling I faced with following error
>>> gcc -L/sw64/lib -bundle -L/sw64/lib/python2.6/config -lpython2.6
>>> build/temp.macosx-10.4-i386-2.6/lapack.o
>>> -L/Applications/development/sage//local/lib -llapack -lf77blas -lcblas
>>> -latlas -o lapack.so -g
>>> Undefined symbols:
>>> "_clapack_dgesv", referenced from:
>>> _dgesv in lapack.o
>>> _dsolve in lapack.o
>>> ld: symbol(s) not found
>>> So I changed clapack_dgesw in lapack.pxd to dgesw and successfully
>>> build it against SAGE (sage-4.2.1-OSX10.6-Intel-64bit-i386-Darwin.dmg)
>>> but when I run testlapack.test() python froze, using 100% of CPU,
>>> below is debuging info.
>>>
>>>
>>>>>> tl.test()
>>>>>>
>>> test start
>>> ^C
>>> Program received signal SIGINT, Interrupt.
>>> 0x00000001005280a4 in dgesv (__pyx_v_Order=CblasRowMajor, __pyx_v_N=3,
>>> __pyx_v_NRHS=1, __pyx_v_A=0x7fff5fbfdda0, __pyx_v_lda=3,
>>> __pyx_v_ipiv=0x7fff5fbfde10, __pyx_v_B=0x7fff5fbfddf0, __pyx_v_ldb=3)
>>> at lapack.c:775
>>> 775 static int dgesv(enum CBLAS_ORDER __pyx_v_Order, int __pyx_v_N,
>>> int __pyx_v_NRHS, double *__pyx_v_A, int __pyx_v_lda, int
>>> *__pyx_v_ipiv, double *__pyx_v_B, int __pyx_v_ldb) {
>>> (gdb) exit
>>>
>>> I was also tried to build it against Mac OS X accelerated framework
>>> and the result is the same, while on linux this example works fine.
>>> Any suggestions what's wrong?
>>>
>> Your change likely caused calling the Fortran dgesv instead. Fortran
>> functions must be called in a different manner, which explains the crash.
>>
>> As to getting it working, what does
>>
>> import numpy
>> numpy.show_config()
>>
>> say? Also, I'm worried that -L/sw64/lib comes before the Sage
>> include...perhaps some libraries come from that directory and some from
>> Sage and they don't match... *shrug*
>>
>>
>
> Hi Dag, thanks for answer.
>
> Here is a numpy config.
>
> In [3]: numpy.show_config()
> lapack_opt_info:
> extra_link_args = ['-Wl,-framework', '-Wl,Accelerate']
> extra_compile_args = ['-msse3']
> define_macros = [('NO_ATLAS_INFO', 3)]
>
> blas_opt_info:
> extra_link_args = ['-Wl,-framework', '-Wl,Accelerate']
> extra_compile_args = ['-msse3',
> '-I/System/Library/Frameworks/vecLib.framework/Headers']
> define_macros = [('NO_ATLAS_INFO', 3)]
>
> I tried to remove -L/sw64/lib, but gcc didn't found libf77blas; moving
> -L/sw64/lib after -L/Applications/development/sage//local/lib still gave
> Undefined symbols:
> "_clapack_dgesv", referenced from:
> _dgesv in lapack.o
> _dsolve in lapack.o
> ld: symbol(s) not found
>
Hmm. I expected a line libraries=[...] in there. Try
scipy.show_config()? I'm afraid I don't have a good answer, one just has
to find the right set of libraries to link with.
Dag Sverre
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