Configuring gcc compiler switches in Qt / QtCreator / QMake

Answer 1

I think you might have forgotten to create Makefile based on new .pro file. Just run:

qmake yourproject.pro

If it still fails you can edit generated Makefile and add this flag.

EDIT: New solution. Add -std=c++0x directly to Makefile. There's a line similar to this:

CXXFLAGS = -pipe -g -gdwarf-2 -arch i386 -Wall -W $(DEFINES)

Just add -std=c++0x so the result is:

CXXFLAGS = -pipe -g -gdwarf-2 -arch i386 -Wall -std=c++0x -W $(DEFINES)

Answer 2

It boils down to reading the manual. Instead of using CXXFLAGS in the .pro file, you need to use QMAKE_CXXFLAGS as in:

main.cpp:

#include <cinttypes>

int main() { return 0; }

main.pro:

SOURCES += main.cpp
QMAKE_CXXFLAGS += -std=c++0x