This is a template CMake project.

The top-level. The CMake here defines our shippable executable and library targets.

This is a component of an application. Generally just a logical "chunk" for organizational purposes. Each component builds a static library that can be linked into final shared library and/or executable targets that are actually packaged and shipped.

There can be from 1 to N component libraries in an application.

Tests live under here, organized by component.

The CMake defines some helpers for creating tests based on a class within a component, as long as files are named appropriately.

Mock objects live here, again organized by component. There are no mock objects in this example.

3rd-party libraries which are included in the source tree live here. Most 3rd-party libraries include their own build systems. When they are simple, I prefer to simply replace those build systems with a basic CMake file that builds the library as if it were part of our application. Do whatever you like here, though.

This is an example of a vendored library with a custom CMake build script. In this case we add gmock to the EXCLUDE_FROM_ALL list so it is only built during make check. We also avoid building redundant gtest/gmock libraries that we don't care about in our test building model.