[CMake] Check if a command exists?

[Andreas Naumann]

I don't know if it's the right way, but I am looking for the 
executable/script with find_file and set up a custom command for it.

Regards,
Andreas Naumann

Am 03.09.2012 21:59, schrieb Rui Maciel:
> I have a small project which includes a couple of parsers whose lexers 
> are generated by re2c.  I intended to set cmake so that it could check 
> if re2c is present in the system, but after browsing through the docs 
> I've ended up empty-handed.
>
> So, is there a way to set a cmake project so that it checks if a 
> tool/program/command is present in the build system?  If there is a 
> way to run that check, can anyone provide an example?
>
>
> Thanks in advance,
> Rui Maciel
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