[cmake-developers] Why does CMAKE_CXX_STANDARD set 'gnu' flags?

[Brad King]

On 10/01/2017 08:29 PM, Nikola Smiljanic wrote:
> I'd like to know why CMake uses 'gnu' flags when setting C++ standard.
> I find this very surprising as 'gnu' mode enables non standard extensions?

Setting the standard level should not affect the extensions, and the compiler's
default mode includes extensions.  There is a separate property for extensions:

  https://cmake.org/cmake/help/v3.9/prop_tgt/CXX_EXTENSIONS.html

It is ON by default since most compilers have extensions on by default.

-Brad