The CMake project to check if a dependency exists can be affected by the cache of other profiles

[gracicot]

We currently use the same dummy project to find dependencies for all profile. An argument that affect the cache (such as compiler) will bleed on other profiles.

Furthermore, you can screw the cache using only one profile by setting an argument and then remove it.

We should have one dummy project by profile and clean it if the profile arguments has changed.

[gracicot]

Fixed!