“-std=gnu++0x”option for MacOS

Question

I\'m trying to compile a CMake project which uses

set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} \"-Wall -std=gnu++0x\")

in the CMakeLists.txt fil

Answer 1

For Lion users facing this issue:

Download and Install the MacPorts-2.2.1-10.7-Lion.pkg MacPorts installer package from here

in a terminal, search for newer GCC versions:

$  port search --name --glob 'gcc*' 

install a newer version (I went with gcc5)

$  sudo port install gcc5

get the name of your new version, and set it as default

$ port select --list gcc

Available versions for gcc:
    llvm-gcc42
    mp-gcc5
    none (active)

$ sudo port select --set gcc mp-gcc5

open a new terminal and validate you're updated:

$ c++ --version
c++ (MacPorts gcc5 5.2.0_0) 5.2.0