cmake-childproject-minimumexample

cmake-childproject-minimumexample

This is a minimal example of adding a child project to cmake, ie instead of using include or add_subdirectory, both of which are conceptually simpler, but have their own set of issues, ie minimal isolation between projects.

This is based on the arrayfile cmake files/configuration, which downloads, builds, and installs clBLAS.

In this implementation in this repository here, it uses an existing source-code directory, but note that 'externalproject' can actually take a git repository url, and do the download automatically, and thus take the place of git submodule.

Variations

There are two variations:

• testextinc-manual: uses externalproject to build the external project, but sets up include directory paths etc manually in the parent project
  • eg, if we dont own the child proejct, this could be appropriate?
• testextinc-findpackage: puts the variables in a xxxConfig.cmake file, that we read using find_package

To build

Assumptions:

• using linux ubuntu 14.04
• cmake installed
• g++ installed

Procedure:

• cd into testextinc-manual or testextinc-findpackage
• run ./run.sh => hopefully binaries should pop out in install subdirectory. Can run it by doing:

install/run.sh