Hi RhoSigma,
it seems that -std=gnu++0x is not working, I've sent all the technical information to Felippe, maybe he can help. It would be nice if qb64's internal c++ compiler had c++11, 14 and 17 support, I think that the gcc version that we're using is old (timestamps date 2012), and therefore its c++11 implementation is not bug-free, maybe the core c++ compiler should be updated? I tried downloading a fresh new version of MinGW and then just stuck it in the "..\internal\c\c_compiler\" folder, which solved the c++11 problem, however, there were a lot of #include not found errors (which could be easily solved by moving them, or just modifying the common.h file, I think), so maybe this can actually be updated without breaking anything, giving us support for c++ standards up to std=c++17?