[CMake] Find out if a target exists?

[Gonzalo Garramuño]

I was wondering what's the best way to determine if a target exists.

I wanted to modify a target's properties but depending on the type of 
build, it may not always exist.


-- 
Gonzalo Garramuño
ggarra at advancedsl.com.ar

AMD4400 - ASUS48N-E
GeForce7300GT
Kubuntu Edgy