[CMake] Built-in way to detect if a root script is standalone or not?

[Robert Maynard]

That is about the easiest way to check if you are standalone.

On Mon, Jul 17, 2017 at 10:58 AM, Robert Dailey
<rcdailey.lists at gmail.com> wrote:
> I have logic similar to this in some of my middleware libraries' root
> CMakeLists.txt:
>
> if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
>     set( STANDALONE TRUE )
> endif()
>
> Is there a built-in way to detect this?
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