Hi Antonio.
Is there another reason why "cmake --build cmake_build -- install" might still result in "sbrk.c:21: undefined reference to `end'" link time error? I have done a "git checkout 9d455a7" of the Git hash you mention in your patch as well as forced "#define _CC_PAL_LOG(level, format, ...)" to be nil, but am still seeing the link error.
Regards, -Arun.