[CMake] Find script distribution strategy

[Barth]

Hello, 

Let be a project A developed and distributed by organization AA. 
Let be another project B depending on A, developed by organization BB. B
calls find_package(A) in its CMakeLists.txt as to get the dependencies
libraries and includes. 

How should FindA.cmake be distributed ? 
Option 1: package A (eg. A.rpm) installs it in /usr/share/cmake/ (on Linux)
so that it is found by B or any other project that needs it.
Option 2: package A installs it in a more specific location such as
/opt/A/cmake. However, how would B find it ? 
Option 3: package A doesn't install it anywhere and we let the developers of
B download it manually. 

I would go for option 1 but I am not really sure what is the standard way. 

Thank you in advance
Barth

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