http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52899
Bug #: 52899 Summary: tabstop has no effect Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: preprocessor AssignedTo: unassig...@gcc.gnu.org ReportedBy: m...@gcc.gnu.org By grepping for tabstop in GCC sources, one can see that -ftabstop= is never used for anything. I am not sure what was its original purpose, but we can probably remove it now and accept the option silently for compatibility. On the other hand, GCC does not follow GNU conventions, since tabs are not counted as 8 spaces when reporting column info.