CMake find_package not finding Find<package>.cmake
I made and installed the aruco library, which put a Findaruco.cmake file in the /usr/local/lib/cmake directory. In my CMakeLists.txt file I have
...
find_package(aruco REQUIRED)
and it always returns the standard error
By not providing "Findaruco.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "aruco", but
CMake did not find one.
Could not find a package configuration file provided by "aruco" with any of
the following names:
arucoConfig.cmake
aruco-config.cmake
Add the installation prefix of "aruco" to CMAKE_PREFIX_PATH or set
"aruco_DIR" to a directory containing one of the above files. If "aruco"
provides a separate development package or SDK, be sure it has been
installed.
I've set the environment variable $CMAKE_PREFIX_PATH to each of the following, and none work
/usr/local
/usr/local/lib
/usr/local/lib/cmake
The only thing that works is setting the following in CMakeLists
set(CMAKE_MODULE_PATH /usr/local/lib/cmake)
I'm not sure what I'm doing wrong
Answer
Try setting CMake variable called CMAKE_PREFIX_PATH, not environment one. Use -D flag during cmake invocation:
cmake -D CMAKE_PREFIX_PATH=/usr/local/lib <path to source or build dir>
But AFAIR, CMake should look into /usr/local prefix as its default behavior.