c++ - How to enable C++11 in CLion?

Question

I'm trying to run C++11 code in CLion but it doesn't work. It says:

...
    /projects/CLion/untitled/main.cpp:7:1: note: C++11 ‘constexpr’ only available with -std=c++11 or -std=gnu++11
...

I tried to set CMAKE_C_FLAGS to -std=c++11 or -std=gnu++11 but I still have the same problem. Regular C++ code compiles fine.

What flag do I have to set in CLion's CMake window to compile my C++11 code?

Answer 1

I tried to set CMAKE_C_FLAGS

According to the documentation the CMAKE_C_FLAGS set C language flags for all build types. For C++ you need use CMAKE_CXX_FLAGS instead:

set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")