The documentation is not so great. What I’m doing is enabling platforms (https://docs.bazel.build/versions/master/platforms-intro.htm...), defining the OS and CPU target for my system, copying the configuration out of Bazel’s “local_config_cc”, and modifying it to fit my use case. This didn’t take me very long, but it’s also not the first time I’ve done it.

Thanks! I agree that the documentation isn’t that great and I feel there are lots of holes.

Did some searching and found this documentation on customizing C++ toolchain. I'll give it a try.

https://docs.bazel.build/versions/master/tutorial/cc-toolcha...