https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105238
--- Comment #2 from Esger Abbink <esgergn at hotmail dot com> --- There certainly is overlap yes, in particular: "(a) build directory relative paths were stored as the .gcda paths (/a/b/c/master/path/to/file.gcda becomes path/to/file.gcda)" from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105063#c8 is exactly what we want (without mangling). Where the build directory would then be /home/esger/src/application in the situation described above. I am happy to test the patch, but not quite sure how to proceed. -fprofile-prefix-map is not a valid option for gcc 9 or 10 as far as I can tell. To which gcc version/branch should I apply the patch? (the other issue mentions a 10.3.x branch, but a clone of the git gcc source does not seem to have such a branch?)
