Even though sccache has had #276 for a long time and now with 0.3.0 apparently also #952, for me it is still breaking profiled builds.

The first build with an empty cache (respectively a cache that presumably doesn't contain any remnants of previous PGO builds) goes through fine, but on a subsequent build during the -fprofile-instr-use-phase linking almost invariably fails with a message like

34:58.88 LLVM ERROR: Function Import: link error: linking module flags 'ProfileSummary': IDs have conflicting values in '..\xre\nsAppRunner.obj' and '....\layout\base\Unified_cpp_layout_base1.obj'