https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47618
--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> --- Created attachment 41481 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41481&action=edit Patch candidate I'm attaching patch that supports following expansion of -fprofile-dir (or arguments of -fprofile-generate and -fprofile-use) option value: %w - expands during compile time to working directory; it's handy when one wants to preserve tree hierarchy of gcda files corresponding to another build directory %p - expands during run-time to PID %q{ENV} - expands to value of environmental variable 'ENV' during run-time Having that, I guess we can eventually drop GCOV_PREFIX_STRIP and GCOV_PREFIX as one can use -fprofile-dir="%q{PREFIX}" and then e.g. set PREFIX="../my/folder/". Feel free to comment the patch.