Document RAJA CMake config for external projects

[llnl]

Document RAJA CMake config for external projects

[davidbeckingsale]

Maybe in a "Using RAJA" section? I know @rhornung67 is planning to add some primer documentation, so it would probably be] appropriate to link back to the documentation about the CMake file at the point in the primer we send people off to work on their own code.

[DavidPoliakoff]

Where should this live? http://software.llnl.gov/RAJA/config_build.html ?

[rhornung67]

@davidbeckingsale is this adequately documented in the RAJA user guide? If so, please close issue. If not, please beef up the docs.

[davidbeckingsale]

I will add another section to the docs.

[rhornung67]

Thanks.

[rhornung67]

@davidbeckingsale is this done?

[davidbeckingsale]

Nope. Shall I add it to the rc branch?

[rhornung67]

Sure. That's where I've been adding to the documentation. Thanks.

[rhornung67]

@davidbeckingsale did this get added to the docs?

[davidbeckingsale]

Yup: https://raja.readthedocs.io/en/master/using_raja.html