https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63670
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- C_INCLUDE_PATH is exactly like PATH and that an empty part is considered the current working directory.