https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119266
--- Comment #5 from Sam James <sjames at gcc dot gnu.org> --- Unfortunately, realpath isn't in POSIX shell, but: ``` $ realpath --relative-to=$A /usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15/bits/std.cc include/g++-v15/bits/std.cc ``` and indeed using `"source-path": "include/g++-v15/bits/std.cc",` and so on works fine for CMake.
