https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99241
--- Comment #7 from Christopher Greeley <cgreeley at student dot bridgew.edu> --- Created attachment 53759 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53759&action=edit The pre processed header I tried to import into my module and the module code This is the preprocessed header, -E on the module file only gives: "g++: warning: Source/Common.mpp: linker input file unused because linking not done"