https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125964
--- Comment #2 from Nikita Leontiev <nikita.leontiev at gmail dot com> --- The paragraph about a separate directory should be something like this: "Alternatively, you might decide to put the precompiled header file in a separate directory, then -include can be used to prevent header lookup in the directory containing the original header and -I can be used to add this directory to the lookup list."
