Seems Qt creator “platform codegen flags” does not take effect (Tools->Options…->Build&Run->Compillers). Mentioned there “-std=c++11” flag however it was not added to Makefile. Also added g++-5 there – also no effect: CXX = g++ CXXFLAGS = -pipe -g -Wall -W $(DEFINES)
Should be: CXX = g++-5 CXXFLAGS = -pipe -g -Wall -W $(DEFINES) -std=c++11
How to correctly add flags there.
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Answer
If you use qmake as build system, then you can add flags to the compiler via QMAKE_CXXFLAGS variable in your .pro file:
QMAKE_CXXFLAGS += -std=c++11
And specify a compiler for C++:
QMAKE_CXX = g++-5
Also you can pass additional arguments to make in the “Projects” tab.
Don’t know what is “platform codegen flags” though.