[CMake] Find packages coming from homebrew

[Cedric Doucet]

Hello, 

I would like to write some FindFoo.cmake files to find packages installed on different systems including Mac. 
I have noticed that homebrew install packages in a repertory whose name depends on the version of the package. 
For example, I have installed a scientific library called scotch, and it is now installed here: 



/usr/local/Cellar/scotch/6.0.4_4 




What is the best way to handle such a path in FindScotch.cmake? 




I have think about these ones: 

- looking for /usr/local/Cellar/scotch/${SCOTCH_VERSION} where SCOTCH_VERSION has to be provided by users; 

- force users to install a specific version of Scotch which is hardcoded in SCOTCH_VERSION variable. 

I think the latter option is better since there is no reason that any version of scotch will be compatible with my own code. 

Is there a better way? 

Best regards, 

Cédric 
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