Compiling C++11 with g++ 5.4

-std=c++11 sounds to be ignored when compiling :

    g++ -std=c++11 -I../include -I ../../../Toolbox/CShmRingBuf/ -I$MILDIR/include CFrameProd.cpp -o CFrameProd.o
CFrameProd.cpp: In constructor ‘CFrameProd::CFrameProd()’:
CFrameProd.cpp:33:24: error: assigning to an array from an initializer list
     MilGrabBufferList_ = {0};

I tries -std=c++0x, -std=gnu++0x, -std=c++14, nothing helped.

Here is my g++ version :

g++ --version
g++ (Ubuntu 5.4.0-6ubuntu1~16.04.11) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

May I ask you some hints ?

Cheers !

Sylvain