CMake Community Modules

The CMake Community Modules are CMake modules created and maintained by the community.

This repository's main product is the CMakeCM.cmake file in the repository root. It defines what modules are available for download and consumption.

How Do I Use the CMakeCM Modules?

There are two ways to use the modules provided by CMakeCM

Use PMM (Recommended)

PMM is a CMake tool that drives package management facilities from your own CMakeLists.txt.

After including pmm.cmake in your project, pass CMakeCM to the pmm() function, and the CMakeCM modules will be available for usage.

PMM will periodically download the latest version of CMakeCM without any user intervention.

Example:

include(pmm.cmake)
pmm(CMakeCM)  # Enable the CMakeCM modules

# Include a module:
include(CMakeRC)

That's all there is to it!

Download the CMakeCM.cmake File to Your Own Project.

The CMakeCM.cmake file can be placed in your own project and include()'d just like a regular file.

After you include(CMakeCM.cmake), all modules from CMakeCM will be ready to use.

Note: The modules are defined by CMakeCM.cmake, and it will not upgrade itself automatically! For this reason, using PMM is recommended.

Example:

include(CMakeCM.cmake)

# Include a module:
include(CMakeRC)

I Want to Contribute a Module!

There are two ways to contribute a module to CMakeCM:

1. Add a "local" module in this repository.
2. Add a reference to a "remote" module.

Both methods will require modifying the repository and declaring the module in CMakeCM.cmake

Adding a "Local" Module

Local modules are contained within the CMakeCM repository. If you do not wish to own a separate repository to contain the module, this is the recommended way to do so.

To start, add a module file to the modules directory. This will be the module that will be included by the user. It should consist of a single CMake file.

After adding the module, add a call to cmcm_module in CMakeCM.cmake.

Suppose you add a SuperCoolModule.cmake to modules. The resulting call in CMakeCM.cmake will look something like this:

cmcm_module(
    SuperCoolModule.cmake
    LOCAL modules/SuperCoolModule.cmake
    VERSION 1
    )

The VERSION argument is an arbitrary string that is used to invalidate local copies of the module that have been downloaded.

Adding a "Remote" Module

If you have a module that you wish to add, but it is contained in a remote location, you simply need to add the call in CMakeCM.cmake:

cmcm_module(
    MyAwesomeModule.cmake
    REMOTE https://some-place.example.com/files/path/MyAwesomeModule.cmake
    VERSION 1
    )

The VERSION argument is an arbitrary string that is used to invalidate local copies of the module that have been downloaded.

The REMOTE is a URL to the file to download for the module. In order for your modification to be accepted into the repository, it must meet certain criteria:

1. The URL must use https.
2. The URL must refer to a stable file location. If using a Git URL, it should refer to a specific commit, not to a branch.