Re: [Discuss-gnuradio] Out-of-tree module build fails for lack of Doxygen, despite -DENABLE_DOXYGEN=OFF

[Monahan-Mitchell, Tim]

> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden
> On Behalf Of Monahan-Mitchell, Tim
> Sent: Friday, April 05, 2013 2:40 PM
> To: address@hidden
> Subject: [Discuss-gnuradio] Out-of-tree module build fails for lack of
> Doxygen, despite -DENABLE_DOXYGEN=OFF
> 
> I first used gr_modtool.py to successfully create my out-of-tree module on
> an Ubuntu 12.04 LTS x86 system (GNU Radio 3.6.4.1).
> 
> I am now building my module on an Ubuntu system that does not have
> /usr/bin/doxygen (the new system is based on 12.04 LTS for Arm).
> 
> Despite specifying -DENABLE_DOXYGEN=OFF, the build fails thusly:
> 
> # cmake -DENABLE_DOXYGEN=OFF ../
> -- Build type not specified: defaulting to release.
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /src/gr-mymodule/build
> # make
> [  5%] Built target gnuradio-mymodule
> [ 16%] Built target test-mymodule
> [ 22%] Built target _mymodule_swig_doc_tag
> [ 27%] Built target _mymodule_swig_swig_tag
> [ 33%] Generating doxygen xml for mymodule_swig_doc docs
> /bin/sh: 1: /usr/bin/doxygen: not found
> make[2]: *** [swig/mymodule_swig_doc_swig_docs/xml/index.xml] Error
> 127
> make[1]: *** [swig/CMakeFiles/_mymodule_swig.dir/all] Error 2
> make: *** [all] Error 2
> 
> I have duplicated the above failure on the Ubuntu 12.04 LTS x86 machine by
> first doing "sudo mv /usr/bin/doxygen /usr/bin/doxygen_tmp" to simulate
> no doxygen installed.
> 
> I am trying the same experiment on the gnuradio tree (3.6.4.1) on Ubuntu
> 12.04 LTS x86; if it builds, maybe I can compare various files to see the
> difference.

The gnuradio tree build was able to handle this test, so that is good.

> But maybe one of you can beat me to the solution or a work-around :)

I found a work-around by a hostile takeover of the FindDoxygen module of Cmake:

(with sudo as needed)
# echo 'set(DOXYGEN_FOUND "NO")' >/usr/share/cmake-2.8/Modules/FindDoxygen.cmake
# echo 'set(DOXYGEN_DOT_FOUND "NO")' 
>>/usr/share/cmake-2.8/Modules/FindDoxygen.cmake

I will leave it to the smarter people of this list to find a better solution. 
Cheers!