https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79287
--- Comment #2 from Oliver Kiddle <okiddle at yahoo dot co.uk> --- The interpretation of the string being outside the scope of the standard doesn't stop this being an issue. Should I, as an outsider, interpret a WONTFIX resolution as meaning that you regard it as something that should not be changed - it is intended behavior - or merely that you as an individual are not motivated to fix it yourself. In the case of the former, some explanation would be nice and in the latter case, I'd have thought that leaving the issue open with a note to indicate whether a patch would be welcomed would be more helpful. To further elaborate on the issue, note that the preprocessor does work in the manner I suggest. The documentation for the -I option even states that "the general behavior of -I and "INCLUDE" is pretty much the same as of -I with "#include" in the cpp preprocessor.