Compile error happens on MacOS

[ZuyingWo]

fatal error: 'KHR/khrplatform.h' file not found

build$ make
Scanning dependencies of target glxw
[ 1%] Building C object glxw/CMakeFiles/glxw.dir/src/glxw.c.o
In file included from /Users/anonymous/git/OpenGL/OpenGL-Examples/build/glxw/src/glxw.c:1:
In file included from /Users/anonymous/git/OpenGL/OpenGL-Examples/build/glxw/include/GLXW/glxw.h:7:
/Users/anonymous/git/OpenGL/OpenGL-Examples/build/glxw/include/GL/glcorearb.h:82:10: fatal error: 'KHR/khrplatform.h' file not found
#include <KHR/khrplatform.h>
^~~~~~~~~~~~~~~~~~~
1 error generated.
make[2]: *** [glxw/CMakeFiles/glxw.dir/src/glxw.c.o] Error 1
make[1]: *** [glxw/CMakeFiles/glxw.dir/all] Error 2
make: *** [all] Error 2

[ZuyingWo]

Just for reference.

python2.7 ../glxw/glxw_gen.py --api khr --output ./glxw/
python2.7 ../glxw/glxw_gen.py --api egl --output ./glxw/

====
If you want to build it on the latest repo, check here.
https://github.com/ZuyingWo/OpenGL-Examples