GCC/G++ : Enable -std=c++11 from environment variable

Question

I have some OpenCV/C++ application which compiles with a CMake definitions file, in which I did not find a way to pass flags to the compiler.

I know that there are the flags C_INCLUDE_PATH CPLUS_INCLUDE_PATH, and all the rest of their friends...

But, is there an environment variable for definition of any other flags, in which I'd be able to define -std=c++11 ?

Does [this question](http://stackoverflow.com/questions/10851247/how-to-activate-c-11-in-cmake) solve your issue? — TartanLlama, Mar 24 '16 at 09:49

score 2 · Answer 1 · answered Oct 25 '16 at 08:02

2

If you're using CMake, equally easy and nicer solution will be to pass

-DCMAKE_CXX_STANDARD=11 -DCMAKE_CXX_STANDARD_REQUIRED=ON

to CMake.

answered Oct 25 '16 at 08:02

mfolusiak

score 1 · Accepted Answer · edited May 23 '17 at 12:16

1

The easiest but certainly not nicest solution if you want to force it by hand would be:

add_compile_options(-std=c++11)

However CMake should be able to pick the necessary standard for you. Have a look to this answer: How to detect c++11 support of a compiler with cmake

edited May 23 '17 at 12:16

Community

answered Mar 24 '16 at 10:32

Stefano

2 Answers2