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I have a lib I installed by hand (to /usr/local) on a Linux system (Eigen3, by the way). There is a FindEigen3.cmake bundled with the lib but that is not installed anywhere by default.
There is /usr/share/cmake-x.y/Modules where CMake looks for additional modules, but putting these files there doesn't seem the way to do things. Is there an equivalent place under /usr/local that is also scanned by default? Or what is the standard way of creating custom library modules?
(Although the question isn't strictly connected to programming, I think library authors may also encounter the same question from the other side: where to put these files when installing manually.)
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Using Modules Allowing CMakeLists files to make use of reusable modules enables the entire community to share reusable sections of code. For CMake, these sections are called cmake-modules and can be found in the Modules subdirectory of your installation.
CMake ships with its own set of built-in find_package scripts, and their location is in the default CMAKE_MODULE_PATH.
;-list of directories specifying a search path for CMake modules to be loaded by the include() or find_package() commands before checking the default modules that come with CMake. By default it is empty, it is intended to be set by the project.
A CMAKE file is a project file created by the open-source, cross-platform tool CMake. It contains source script in the CMake language for the entire program. CMake tool uses programming scripts, known as CMakeLists, to generate build files for a specific environment such as makefiles Unix machine.
In our project we place FIndXXX.cmake modules in folder project root dir/cmake/modules. For this to work you have to specify in project root dir/CMakeLists.txt (similiar to what DLRdave has already said):
set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/modules)
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