https://dfux.me/tags/cmake/ Recent content in Cmake on Dirk Hugo en-us This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Mon, 19 Oct 2026 17:39:27 +0200 https://dfux.me/posts/2026-10-19-why-does-the-build-take-so-long/ Mon, 19 Oct 2026 19:30:00 +0200 https://dfux.me/posts/2026-10-19-why-does-the-build-take-so-long/ <p>Building <a href="https://github.com/difu/Brainiac">Brainiac</a> on my Mac took too long. Long enough that working on two things in parallel was no fun at all. So I had a look at what my machine was actually doing all that time.</p> <h3 id="55-times-the-same">55 times the same</h3> <p>Brainiac has about 120 source files and 55 test executables. And every single test compiled all of the sources again. Every new test got its own <code>add_executable</code> with the complete source list. Fine for three tests. Not for 55.</p>