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Re: [Discuss-gnuradio] Building gnuradio with Pybombs on MacOSX

From: Brian Cuthie
Subject: Re: [Discuss-gnuradio] Building gnuradio with Pybombs on MacOSX
Date: Sat, 22 Oct 2016 22:12:19 +0000

Hi Ron,

That’s a great pointer, thanks. I hadn’t noticed that gr-fec also uses gsl. 

Looking at the CMake config for gr-fec I can see where it adds the path for 
libgsl, however, the path definition appears to be missing from the gr-dtv and 
gr-atsc configs. So while the link command for gr-fec includes 
"-L/opt/local/lib” to define where to find libgsl, the link commands for 
gr-atsc and gr-dtv do not and the link fails.

Here’s the link command CMake spit out for gr-dtv swig:

   -std=c++98 -O2 -g -DNDEBUG -bundle -Wl,-headerpad_max_install_names  -o 
_dtv_swig.so CMakeFiles/_dtv_swig.dir/dtv_swigPYTHON_wrap.cxx.o 
../../gr-fft/lib/libgnuradio-fft.3.7.11git.dylib /opt/local/lib/libfftw3f.dylib 
/opt/local/lib/libboost_system-mt.dylib /opt/local/lib/libboost_regex-mt.dylib 
/opt/local/lib/libboost_thread-mt.dylib /opt/local/lib/libboost_chrono-mt.dylib 
/opt/local/lib/libboost_atomic-mt.dylib /opt/local/lib/liblog4cpp.dylib -lgsl 
-lgslcblas -lm ../../volk/lib/libvolk.1.3.dylib /opt/local/lib/liborc-0.4.dylib 

I can’t really figure why this builds for anyone else. Am I missing something?


> On Oct 19, 2016, at 10:21 PM, Ron Economos <address@hidden> wrote:
> For the gr-dtv issue, it's probably because gr-dtv needs gr-fec for the 
> Reed-Solomon encoder and decoder. But gr-fec needs libgsl for the LDPC stuff.
> If you look at the cmake output, it checks for libgsl right before 
> configuring gr-fec. On my Ubuntu 16.04 box, it looks like this.
> -- Checking for module 'gsl >= 1.10'
> --   Found gsl , version 2.1
> -- Found GSL: gsl;gslcblas;m
> -- 
> -- Configuring gr-fec support...
> --   Dependency ENABLE_VOLK = ON
> --   Dependency Boost_FOUND = 1
> --   Dependency ENABLE_GR_BLOCKS = ON
> --   Dependency GSL_FOUND = TRUE
> --   Enabling gr-fec support.
> --   Override with -DENABLE_GR_FEC=ON/OFF
> You might as well leave gr-atsc disabled. All of it's functionality has been 
> replicated in gr-dtv, and it's going away in Gnu Radio 3.8.
> Ron
> On 10/19/2016 03:13 PM, Brian Cuthie wrote:
>> Greetings,
>> After a few failures, I’ve been able to build gnuradio from source using 
>> pybombs on a Mac. But I ran into a some issues that I’m hoping someone can 
>> share their wisdom on.
>> In no particular order:
>> 1) gr-dtv and gr-atsc fail trying to link to libgsl.
>> The libraries are installed, but there doesn’t seem to be any relevant path 
>> information on the link command line. I suspect this is a cmake 
>> configuration error, but I’m still finding my way around cmake and haven’t 
>> yet even been able to see where the cmake configuration requires gsl for 
>> those modules.
>> I had to temporarily exclude gr-dtv and gr-atsc by adding the following to 
>> config_opt in the gnuradio.lwr recipe file:
>>      -DENABLE_GR_DTV=0
>>      -DENABLE_GR_ATSC=0
>> 2) On a successful build, gnuradio-companion crashed miserably because 
>> everything was not linked to the same python interpreter. Adding specific 
>> path definitions to the recipe fixed that problem.
>>      -DPYTHON_EXECUTABLE=/opt/local/bin/python2.7
>> -DPYTHON_INCLUDE_DIR=/opt/local/Library/Frameworks/Python.framework/Versions/2.7/Headers
>> -DPYTHON_LIBRARY=/opt/local/Library/Frameworks/Python.framework/Versions/2.7/Python
>>      -DSPHINX_EXECUTABLE=/opt/local/bin/rst2html-2.7.py).
>> I can see where this is a mac specific issue because with ports we end up 
>> with competing python interpreters (the one supplied with the system, and 
>> the one used by ports in /opt). Perhaps there’s a solution in cmake or a 
>> conditional configuration directive might be a useful enhancement to pybombs.
>> 3) Thrift failed to build because it wanted to link to a static version of 
>> some boost libraries. But the default port install of boost doesn’t include 
>> the static version of its libraries. So I had to pre-install boost with the 
>> “-no_static” option. Again, this is a Mac specific thing. But a conditional 
>> directive in pybombs recipes might also help here.
>> Any advice is welcome. Thanks in advance.
>> -brian
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