cmake .. fails: Cannot find GL/gl.h #806

[ 25%] Building C object CMakeFiles/OpenCL.dir/icd_linux.c.o
[ 75%] Building C object CMakeFiles/OpenCL.dir/icd_dispatch.c.o
[ 75%] Building C object CMakeFiles/OpenCL.dir/icd.c.o
In file included from /home/turgut/.hunter/_Base/59b2b88/95f6d02/c20b399/Build/OpenCL/Source/icd_dispatch.c:38:0:
/home/turgut/.hunter/_Base/59b2b88/95f6d02/c20b399/Build/OpenCL/Source/icd_dispatch.h:66:10: fatal error: GL/gl.h: No such file or directory
#include <GL/gl.h>
^~~~~~~~~
compilation terminated.
gmake[5]: *** [CMakeFiles/OpenCL.dir/build.make:87: CMakeFiles/OpenCL.dir/icd_dispatch.c.o] Error 1
gmake[5]: *** Waiting for unfinished jobs....
In file included from /home/turgut/.hunter/_Base/59b2b88/95f6d02/c20b399/Build/OpenCL/Source/icd.c:39:0:
/home/turgut/.hunter/_Base/59b2b88/95f6d02/c20b399/Build/OpenCL/Source/icd_dispatch.h:66:10: fatal error: GL/gl.h: No such file or directory
#include <GL/gl.h>
^~~~~~~~~
compilation terminated.
gmake[5]: *** [CMakeFiles/OpenCL.dir/build.make:63: CMakeFiles/OpenCL.dir/icd.c.o] Error 1
gmake[4]: *** [CMakeFiles/Makefile2:68: CMakeFiles/OpenCL.dir/all] Error 2
gmake[3]: *** [Makefile:130: all] Error 2
gmake[2]: *** [CMakeFiles/OpenCL-Release.dir/build.make:115: OpenCL-Release-prefix/src/OpenCL-Release-stamp/OpenCL-Release-build] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/OpenCL-Release.dir/all] Error 2
gmake: *** [Makefile:84: all] Error 2

[hunter ** FATAL ERROR **] Build step failed (dir: /home/turgut/.hunter/_Base/59b2b88/95f6d02/c20b399/Build/OpenCL
[hunter ** FATAL ERROR **] [Directory:/home/turgut/.hunter/_Base/Download/Hunter/0.19.213/59b2b88/Unpacked/cmake/projects/OpenCL]