CMake find_package: where did it find the package?

Ah ok, I found a solution here:

https://riptutorial.com/cmake/example/21128/debug-find-package---errors

Turns out there is a special debug flag to make find_package tell you where it is searching:

cmake -D CMAKE_FIND_DEBUG_MODE=ON ..

As of CMake 3.17, the cmake command line has native support for printing the search directories for all of the CMake find_* commands. Use the --debug-find flag:

cmake --debug-find ..