Hi Andy,
I found _ATL_drotg defined in /opt/local/lib/libatlas.a.
_ATL_drotg is listed as an undefined reference in libcblas.a, libf77blas.a, and
libptcblas.a.
That said, I'm mystified as to why these symbols cannot be located. Does this
hint at a potential problem in linking?
Thanks again,
Andrew
On Oct 16, 2012, at 3:26 PM, Andrew Godbehere
<[email protected]> wrote:
> Also, for some reason, scikit-learn tries to build for posix on my system,
> rather than mac osx.
>
> On Oct 16, 2012, at 3:07 PM, Andrew Godbehere
> <[email protected]> wrote:
>
>> Hi Andy,
>>
>> I was suspicious of clang, I'd rather this build with gcc. I'll look into
>> changing that.
>>
>>
>> Here's the output from distutils on blas_opt:
>> {'extra_link_args': ['-Wl,-framework', '-Wl,Accelerate'],
>> 'extra_compile_args': ['-msse3',
>> '-I/System/Library/Frameworks/vecLib.framework/Headers'], 'define_macros':
>> [('NO_ATLAS_INFO', 3)]}
>>
>> Do you see anything suspicious there?
>>
>> I'm trying to find _ATL_drotg, but I'm first having trouble locating the
>> appropriate .so files on my system. I'll have more info once I track them
>> down. I'll check cblas and atlas.
>>
>> Thanks for the help!
>>
>> Best,
>> Andrew
>>
>> On Oct 16, 2012, at 1:11 PM, Andreas Mueller <[email protected]>
>> wrote:
>>
>>> Hi Andrew.
>>> Let's see if we can get to the bottom of this.
>>> I'm really no expert here.
>>>
>>> On 10/16/2012 09:01 PM, Andrew Godbehere wrote:
>>>> otools (as opposed to ldd) on arrayfuncs.so yields:
>>>> (1) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
>>>> version 169.3.0)
>>>> (2) /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate
>>>> (compatibility version 1.0.0, current version 4.0.0)
>>>>
>>>> I'm hoping this isn't an issue with OSX Accelerate.
>>>>
>>>> arrayfuncs.so was built as follows:
>>>>
>>>> /usr/bin/clang -bundle -undefined dynamic_lookup -L/opt/local/lib
>>>> build/temp.macosx-10.8-x86_64-2.7/sklearn/utils/arrayfuncs.o
>>>> -Lbuild/temp.macosx-10.8-x86_64-2.7 -lcblas -lm -o
>>>> sklearn/utils/arrayfuncs.so -Wl,-framework -Wl,Accelerate
>>>>
>>> Err. Has any one tried building with clang yet? But I guess that's not the
>>> problem ;)
>>> I would have expected some atlas linker flags.
>>> Do you by any chance know where
>>> _ATL_drotg is defined? I have drotg from cblas and it is defined in
>>> cblas.so. So I would guess some linker flag is missing.
>>>
>>> Also, could you please run:
>>>
>>> from numpy.distutils.system_info import get_info; print
>>> get_info('blas_opt', 0)
>>>
>>> This should tell us what numpy things are good compiler flags.
>>>
>>> Andy
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