Compilation of C++14 in qtcreator

Question

I have a qt project containing parts in C++14.

Recently, I changed my ubuntu distro. Now I have 16.04 LTS and I installed Qt creator 4.02 (built on jun 13).

In order to enable C++14 compilation, I put in the project file:

QMAKE_CXXFLAGS += -std=c++14

However, when building project, the IDE generates the following command:

g++ -c -pipe -std=c++14 -g -O0 -g -std=gnu++11 -Wall -W -D_REENTRANT ...

As seen, the generated makefile puts the flag -std=gnu++11 which overrides the flag for C++14. This did not happen with my previous distro (LTS 12.04, same qt creator version).

I tried with

CONFIG += -std=c++14

But the behavior is the same.

Could someone give any clue?

Answer 1

Instead of:

CONFIG += -std=c++14

Use:

CONFIG += c++14