On Tue, 3 Jan 2023 10:51:36 -0500 Stefan Hajnoczi <stefa...@gmail.com> wrote:
> QEMU's Makefile used to a use a technique where it generated > "timestamp" files and used cmp(1) to check if rebuilding was > necessary: > 1. Always generate meson-buildoptions.sh-timestamp. `meson-buildoptions.sh-timestamp` would be the full expected output, right? It's not just a date or something. AFAIU that would make sure that if nothing changed in the output you don't trigger other targets depending on `meson-buildoptions.sh`. It's a solution for a different problem. The problem with always rebuilding `meson-buildoptions.sh` is that we spend 1 extra second on every build, even those that doesn't need to rebuild anything else. Not unacceptable, but I think we should strive not to commit generated files and move the file to the build directory, unless there's a reason why this is not viable that I'm not seeing. -- Alessandro Di Federico rev.ng Labs
