[CMake] CCACHE_DIR Environment Variable

[David Lind]

I am porting existing makefiles to cmake. One of the key features of these makefiles is setting the CCACHE_DIR environment variable based upon the tool chain selected.

I have TC_<toolchain>.cmake files created. Ideally, I would add a line to these files to set the CCACHE_DIR. But, CMake doesn’t have the ability to set environment variables during the build step. So, I’m stuck.

Has anyone encountered this kind of situation?

—Dave