py-cvxopt +DSDP

[Mark Brethen]

I installed cvxopt with -DSDP and that also worked (Not sure what I lose  not installing it).

Sent from my iPhone

On Jul 28, 2014, at 11:56 AM, Jonathan Stickel <jjstickel at gmail.com> wrote:

>> Date: Sun, 27 Jul 2014 13:47:20 -0500
>> From: Mark Brethen <mark.brethen at gmail.com>
>> Subject: py-cvxopt +DSDP
>> 
>> py-cvxopt installed fine without any errors. However, when I tried running example code it reports:
>> 
>> Symbol not found: _ATL_cGetNB
>>  Referenced from: /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cvxopt/lapack.so
>> 
>> Why does numpy and cvxopt use Apple's Accelerate framework by default and DSDP use macport's ATLAS?
>> 
>> Ticket #37097 describes issues building DSDP and other ports that depend on it (like cvxopt) due to linker issues with building against macports' ATLAS. I uninstalled DSDP and ATLAS and then patched DSDP as suggested in the ticket, but when I tried to install DSDP again it failed because it could not find Apple's Accelerate framework:
>> 
>> :info:build /usr/bin/clang -O3 -arch x86_64 -o maxcut maxcut.o /opt/local/var/macports/build/_Users_marbre_ports_math_DSDP/DSDP/work/DSDP5.8/lib/libdsdp.a -latlas -lm
>> :info:build ld: library not found for -latlas
>> :info:build clang: error: linker command failed with exit code 1 (use -v to see invocation)
>> 
>> I guess if you do this, you also need to provide the path to Apple's Accelerate framework?
> 
> 
> It seems that DSDP does not work with Apple's Accelerate framework,
> and hence if you use the +dsdp variant for py-cvxopt (not required),
> then you must use also use the +atlas variant for py-cvxopt. I suppose
> it is a bug that this conflict is not flagged in the py-cvxopt
> portfile. You could open a ticket for that part, if you like. In the
> meantime, just reinstall with consistent variants (I recommend using
> +atlas for all of the above, including numpy and scipy).
> 
> Regards,
> Jonathan