[CMake] Setting CXX_STANDARD 11 Enables GNU Extensions

[digitalriptide]

Thank you for the pointers, adding
set( CMAKE_CXX_EXTENSIONS OFF )
to the root CMakeLists.txt disabled the extensions through the project.

On Sat, Jul 4, 2015 at 3:52 PM, Thompson, KT <kgt at lanl.gov> wrote:

>  Try setting CMAKE_CXX_EXTENSIONS this to OFF.
>
>
>
>
> http://www.cmake.org/cmake/help/v3.2/prop_tgt/CXX_EXTENSIONS.html#prop_tgt:CXX_EXTENSIONS
>
>
>
> *From:* CMake [mailto:cmake-bounces at cmake.org] *On Behalf Of *Scott Aron
> Bloom
> *Sent:* Saturday, July 04, 2015 1:17 AM
> *To:* digitalriptide; cmake at cmake.org
> *Subject:* Re: [CMake] Setting CXX_STANDARD 11 Enables GNU Extensions
>
>
>
> This is why I don’t use the CXX_STANDARD and instead use the CXX_FLAGS and
> add the flag I need.
>
>
>
> *From:* CMake [mailto:cmake-bounces at cmake.org <cmake-bounces at cmake.org>] *On
> Behalf Of *digitalriptide
> *Sent:* Friday, July 3, 2015 1:56 PM
> *To:* cmake at cmake.org
> *Subject:* [CMake] Setting CXX_STANDARD 11 Enables GNU Extensions
>
>
>
> If I enable C++11 for some target via
>
> set_target_properties( SomeTarget PROPERTIES CXX_STANDARD 11 )
>
> set_target_properties( SomeTarget PROPERTIES CXX_STANDARD_REQUIRED ON )
>
> with GCC, the code will then compile with -std=gnu++11. Compiling with
> -std=gnu++11 enables C++11 *and* the GNU extensions. Is there an option
> that will result in -std=c++11 in lieu of -std=gnu++11, to build without
> the the GNU extensions?
>
>
>
> Thank you!
>
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