https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69145
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to David Malcolm from comment #3) > (In reply to Tobias Burnus from comment #1) > > Test case (seems as if the file name of the included file matters): > > It may be that the threshold for triggering the bug is length of token >= > 32: libcpp uses location_t to store range information for tokens and > expressions, and uses 5 bits of location_t to store short ranges. i.e. for > tokens of up to 31 chars length, it can store them directly in location_t; > for 32 and above it needs to use an ad-hoc location. Yes, one char shorter filename works fine. > > $ g++ TDICmds.cc > > > > TDICmds.cc:1:24: warning: #pragma implementation for > > ‘create_defect_script_SCDBase.cc’ appears after file is included > > #pragma implementation "create_defect_script_SCDBase.cc" > > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > FWIW, this token is 32 chars long (including the quotes), and so would have > its location stored as an ad-hoc location. Indeed, see the patch I've attached.
