When building the Chromium project I was looking for a way to restart the entire build. This means removing all output files, so that every buildstep is executed again. When a build is started the need to recompile the files is normally determined automatically (by date for example).

The build tool used by chromium is called ninja. After some searching I found that there is an option to execute so-called sublevel tools via the -t option. It turns out that there is a subtool called clean which will remove all output files.

ninja -t clean