CMake: how best to build multiple (optional) subprojects?

Question

Imagine an overall project with several components:

• basic
• io
• web
• app-a
• app-b
• app-c

Now, let\'s say web

Answer 1

Have multiple CMakeLists.txt.

Many open-source projects take this appraoch (LibOpenJPEG, LibPNG, poppler &etc). Take a look at their CMakeLists.txt to find out how they've done this.

Basically allowing you to just toggle features as required.