On quarta-feira, 8 de fevereiro de 2017 20:40:04 PST Marc Mutz wrote: > Hi, > > I just filed https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79433 > complaining that __has_include returns true for headers which then, when > included, #error out about the wrong C++ standard used.
I'm with you. SD-6 says that we should use __has_include to check if it exists, so I'd argue it shouldn't complain when we do it. > We use this mechanism for at least <chrono>, and are either about to > ship it or already do. That's fine since we compile at least in C++11 > mode these days. > > I, however, intended to use the same feature for <string_view> and > <experimental/string_view>, which don't seem to have SD-6 feature test > macros (or else define them in the header which you're not allowed to > include to check), but since we compile qmake only in C++11, not higher, > this was greeted with an #error. > > How do other compilers/platforms behave? I don't think any of them check if the included file #errors out. -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel Open Source Technology Center _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development
