Summary

When configuring an engine build using a custom toolchain, ccache is not used for the target build.

Expected behaviour

All C & C++ build steps should be cacheable

Actual behaviour

Only build steps for the build host are cached

Cacheable calls:   1423 / 1423 (100.0%)

Steps to reproduce

1. Zero ccache stats

   $ ccache -z
   

2. Configure an engine build using ccache and a custom toolchain

   $ gn --target-toolchain=<toolchain> --target-sysroot=<sysroot> --ccache --target-dir=target-ccache
   $ ninja -C engine/src/out/target-ccache
   

3. Verify ccache stats

   ccache -s