Compiling Fortran code for Python module

[Frank Schima]

On May 2, 2013, at 7:32 PM, Joshua Root <jmr at macports.org> wrote:

> On 2013-5-3 08:35 , Frank Schima wrote:
>> As an update. I added the following line to the Portfile which fixed the
>> Fortran code and then goes on to break the C code being compiled later:
>> 
>>    build.env-append     LDFLAGS=-undefined dynamic_lookup -bundle
>> 
>> /usr/bin/clang -bundle -undefined dynamic_lookup -L/opt/local/lib
>> dynamic_lookup build/temp.macosx-10.8-x86_64-2.7/qutip/cyQ/spmatfuncs.o
>> -Lbuild/temp.macosx-10.8-x86_64-2.7 -o
>> build/lib.macosx-10.8-x86_64-2.7/qutip/cyQ/spmatfuncs.so
>> clang: error: no such file or directory: 'dynamic_lookup'
>> 
>> 
>> Any ideas?
> 
> The default LDSHARED command when building C extensions for python
> definitely contains "-bundle -undefined dynamic_lookup". For example
> this is a link command run by py27-game (which succeeds, of course):
> 
> /usr/bin/clang -bundle -undefined dynamic_lookup -L/opt/local/lib -arch
> x86_64 -arch x86_64 build/temp.macosx-10.7-x86_64-2.7/src/imageext.o
> -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib
> -lSDL -lSDL_image -lpng -ljpeg -o
> build/lib.macosx-10.7-x86_64-2.7/pygame/imageext.so
> 
> So it's not clear why (a) you would have to add it manually at all, or
> (b) why it would fail like that. For (a), I can only guess that maybe
> the setup.py is overriding some of the standard distutils behaviour for
> handling environment variables, and overwriting something when it should
> append. The environment is one of the relevant differences between
> running it manually and from a portfile.

I tweaked the Portfile some and for some reason a different error is occurring than this. I'm using the same unquoted build.env-append line above. But it fails at exactly at the same point. Here is the latest error:

compiling C sources
C compiler: /usr/bin/clang -fno-strict-aliasing -fno-common -dynamic -pipe -O2 -fwrapv -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes

creating build/temp.macosx-10.8-x86_64-2.7/qutip/cyQ
compile options: '-I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/include -I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/include -I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/include -I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c'
extra options: '-w -ffast-math -O3'
clang: qutip/cyQ/spmatfuncs.c
/usr/bin/clang -bundle -undefined dynamic_lookup -L/opt/local/lib -undefined build/temp.macosx-10.8-x86_64-2.7/qutip/cyQ/spmatfuncs.o -Lbuild/temp.macosx-10.8-x86_64-2.7 -o build/lib.macosx-10.8-x86_64-2.7/qutip/cyQ/spmatfuncs.so
clang: error: no input files
clang: error: no input files
error: Command "/usr/bin/clang -bundle -undefined dynamic_lookup -L/opt/local/lib -undefined build/temp.macosx-10.8-x86_64-2.7/qutip/cyQ/spmatfuncs.o -Lbuild/temp.macosx-10.8-x86_64-2.7 -o build/lib.macosx-10.8-x86_64-2.7/qutip/cyQ/spmatfuncs.so" failed with exit status 1

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