title: GNU Radio build error "No rule to make target "filter_generated_includes', needed by 'docs/doxygen/xml
body: <p>I am running CentOs 6.5 i686 and trying to install GNU Radio.  I made a build directory and executed "sudo cmake ../" which resulted in the following:</p>
  
  <pre><code>######################################################
  -- # Gnuradio enabled components                         
  -- ######################################################
  --   * python-support
  --   * testing-support
  --   * volk
  --   * doxygen
  --   * sphinx
  --   * gnuradio-runtime
  --   * gr-blocks
  --   * gnuradio-companion
  --   * gr-fec
  --   * gr-fft
  --   * gr-filter
  --   * gr-analog
  --   * gr-digital
  --   * gr-atsc
  --   * gr-audio
  --   * gr-channels
  --   * gr-noaa
  --   * gr-pager
  --   * gr-qtgui
  --   * gr-uhd
  --   * gr-utils
  --   * gr-vocoder
  --   * gr-fcd
  --   * gr-wavelet
  --   * gr-wxgui
  -- 
  -- ######################################################
  -- # Gnuradio disabled components                        
  -- ######################################################
  --   * gr-ctrlport
  --   * gr-comedi
  --   * gr-trellis
  --   * gr-video-sdl
  --   * gr-zeromq
  -- 
  -- Using install prefix: /usr/local
  -- Building for version: 3.7.4 / 3.7.4
  -- Configuring done
  </code></pre>
  
  <p>Warning: Source file "/usr/local/gnuradio/gnuradio-3.7.4/gr-digital/lib/header_payload_demux_impl.cc" is listed multiple times for target "gnuradio-digital".
  -- Generating done
  -- Build files have been written to: /usr/local/gnuradio/gnuradio-3.7.4/build</p>
  
  <p>Then I executed "sudo make" which resulted in the following error:</p>
  
  <pre><code>[alinux build]$ sudo ldconfig
  [alinux build]$ sudo make
  Scanning dependencies of target volk
  [  0%] Building C object volk/lib/CMakeFiles/volk.dir/constants.c.o
  Linking C shared library libvolk.so
  [  2%] Built target volk
  Linking CXX executable test_all
  [  2%] Built target test_all
  Linking CXX executable volk-config-info
  [  2%] Built target volk-config-info
  Linking CXX executable volk_profile
  [  2%] Built target volk_profile
  [  2%] Built target pygen_python_volk_modtool_42925
  [  2%] Built target pygen_python_volk_modtool_fe100
  [  2%] Built target digital_generated_includes
  [  2%] Built target pmt_generated
  [  3%] Built target blocks_generated_includes
  [  3%] Built target filter_generated_includes
  [  3%] Built target analog_generated_includes
  make[2]: *** No rule to make target `filter_generated_includes', needed by `docs/doxygen/xml'.  Stop.
  make[1]: *** [docs/doxygen/CMakeFiles/doxygen_target.dir/all] Error 2
  make: *** [all] Error 2
  [alinux build]$ 
  </code></pre>
  
  <p>I have already built doxygen and it's in my path, I don't know what else could be wrong?
  Any help appreciated!</p>