Compile error, cannot find source file buf.c

[aeetos]

I am attempting a clean compile on ubuntu with a lot of options enabled, specifically:

./prepare.py -c ; ./prepare.py -DENABLE_PROTOBUF=ON -DENABLE_QRCODE=ON -DENABLE_VIDEO=ON -DENABLE_TRANSCODER=ON -DENABLE_CONFERENCE=ON -DENABLE_FFMPEG=ON -DENABLE_SOCI=ON -DENABLE_JPEG=ON -DENABLE_SRTP=ON -DENABLE_MPEG4=ON -DENABLE_PRESENCE=ON -DENABLE_PROTOBUF=ON -DENABLE_OPENH264=ON -DENABLE_NON_FREE_CODECS=ON -DENABLE_LIME_X3DH=ON -DENABLE_WEBRTC_AECM=ON -DENABLE_WEBRTC_AEC=ON -DENABLE_PRESENCE=ON -DENABLE_VCARD=ON -DENABLE_LIME=ON -DENABLE_G729=ON -DENABLE_V4L=ON -DENABLE_ZRTP=ON -DENABLE_OPUS=ON

Things go smoothly until EP_xml2 when I get an error about an unknown buf.c file.

When I remove the include from CMakeLists.txt the compile continues past the error, but of course I have no idea if that's the best solution.

This is with commit c23a39bc0f92362489e7fb37517bd8f8400a58d7

Details:

Cloning into 'EP_xml2'...
Note: checking out 'v2.8.0'.
<< snip >>

HEAD is now at c943f70... Release of libxml2-2.8.0
[ 27%] Performing patch step for 'EP_xml2'
[ 27%] Performing update step for 'EP_xml2'
[ 28%] Performing configure step for 'EP_xml2'

<< snip >>

CMake Error at CMakeLists.txt:351 (add_library):
  Cannot find source file:

    buf.c

  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
  .hxx .in .txx

-- Generating done
-- Build files have been written to: /root/build/flexisip_clean/WORK/flexisip/Build/xml2
CMakeFiles/EP_xml2.dir/build.make:107: recipe for target '/root/build/flexisip_clean/WORK/flexisip/Stamp/EP_xml2/EP_xml2-configure' failed
make[3]: *** [/root/build/flexisip_clean/WORK/flexisip/Stamp/EP_xml2/EP_xml2-configure] Error 1
make[3]: Leaving directory '/root/build/flexisip_clean/WORK/flexisip/cmake'
CMakeFiles/Makefile2:1280: recipe for target 'CMakeFiles/EP_xml2.dir/all' failed
make[2]: *** [CMakeFiles/EP_xml2.dir/all] Error 2
make[2]: Leaving directory '/root/build/flexisip_clean/WORK/flexisip/cmake'
Makefile:83: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/root/build/flexisip_clean/WORK/flexisip/cmake'
Makefile:14: recipe for target 'flexisip-build' failed
make: *** [flexisip-build] Error 2