[CMake] How to determine origin of variable

[David Cole]

On Thu, Aug 25, 2011 at 7:34 AM, Martin Weber <m.weber at razorcat.com> wrote:
> Hi all,
>
> is there a way in CMake to detect, whether a variable has been set on the
> command-line (with the -D option) and not in a CMakelists.txt?
>
> For example, GNU-make has the origin function do do something similar.
>
> Thanks,
>  Martin
>
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No, there's no way to tell.

Why do you ask?