https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89090
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Csaba Ráduly from comment #0) > The two nested "#if __cplusplus >= 201103L" checks are suspicious > (copy-paste error?) > Generating preprocessor output from a one-liner of #include <vector> with > -std=c++11 -save-temps results in a .ii file which shouldn't even compile in > C++11 mode. But it does compile, because the usage in only in a system header, and gcc allows that. Are you actually seeing a problem because of this?
