# Example module¶

This is an example module used to explain the structure of an HPX module.

The tool create_library_skeleton.py can be used to generate a basic skeleton. The structure of this skeleton is as follows:

• <lib_name>/
• README.rst
• CMakeLists.txt
• cmake
• docs/
• index.rst
• examples/
• CMakeLists.txt
• include/
• hpx/
• <lib_name>
• src/
• CMakeLists.txt
• tests/
• CMakeLists.txt
• unit/
• CMakeLists.txt
• regressions/
• CMakeLists.txt
• performance/
• CMakeLists.txt

A README.rst should be always included which explains the basic purpose of the library and a link to the generated documentation.

The include directory should contain only headers that other libraries need. For each of those headers, an automatic header test to check for self containment will be generated. Private headers should be placed under the src directory. This allows for clear seperation. The cmake subdirectory may include additional CMake scripts needed to generate the respective build configurations.

Documentation is placed in the docs folder. A empty skeleton for the index is created, which is picked up by the main build system and will be part of the generated documentation. Each header inside the include directory will automatically be processed by Doxygen and included into the documentation. If a header should be excluded from the API reference, a comment // sphinx:undocumented needs to be added.

In order to consume any library defined here, all you have to do is use target_link_libraries to get the dependencies. This of course requires that the library to link against specified the appropriate target include directories and libraries.