[FFmpeg-trac] #5530(undetermined:new): compile error with --enable-opengl on osx

[FFmpeg]

#5530: compile error with  --enable-opengl on osx
-------------------------------------+-------------------------------------
             Reporter:  ponpon       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 compile error arise with --enable-opengl on osx, where there is glx.h file
 of macports.
 the error doesnt appear, removing glx.h file.
 glx.h is included in ffmpeg/libavdevice/opengl_enc.c

 glx.h and opengl is installed when installing mesa with macports. mesa is
 used by xz, pkgconfig, flex, bison, indent, autoconf, automake, libtool,
 py27-libxml2, xorg-glproto, xorg-dri2proto, xorg-libxcb, xorg-libX11,
 xorg-libXext, xorg-libXdamage, xorg-libXfixes, xorg-libXi, xorg-libXmu,
 xorg-libXxf86vm.
 probably, many macports users abandon to use  --enable-opengl.


 {{{
 ./configure --cc=clang-mp-3.7 --cxx=clang++-mp-3.7  --extra-cflags="
 -I/opt/local/include "  --extra-ldflags=" -L/opt/local/lib "  --enable-
 opengl && make -j 8
 .
 .
 .
 CC      libavfilter/af_amerge.o
 libavdevice/opengl_enc.c:494:30: error: use of undeclared identifier
       'glCompileShader'
     procs->glCompileShader = glCompileShader;
                              ^
 fatal error: too many errors emitted, stopping now [-ferror-limit=]
 4 warnings and 20 errors generated.
 make: *** [libavdevice/opengl_enc.o] Error 1
 make: *** Waiting for unfinished jobs....

 }}}
 {{{
 ./configure --cc=clang-mp-3.7 --cxx=clang++-mp-3.7  --extra-cflags="
 -ferror-limit=0  -I/opt/local/include "  --extra-ldflags="
 -L/opt/local/lib "  --enable-opengl  && make -j 8
 .
 .
 .
 libavdevice/opengl_enc.c:499:70: error: use of undeclared identifier
 'glVertexAttribPointer'
     procs->glVertexAttribPointer = (FF_PFNGLVERTEXATTRIBPOINTERPROC)
 glVertexAttribPointer;
                                                                      ^
 CC      libavfilter/af_afade.o
 CC      libavfilter/af_afftfilt.o
 4 warnings and 24 errors generated.
 make: *** [libavdevice/opengl_enc.o] Error 1
 make: *** Waiting for unfinished jobs....

 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5530>
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