https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94928
--- Comment #14 from Myron Walker <myron.walker at gmail dot com> --- There are three types of files used to create a code coverage report. Notes, Data, and Source. It is likely that each type of file might have its own prefix GCOV_SRC_PREFIX, GCOV_NOTES_PREFIX and GCOC_DATA_PREFIX
