On Mon, Sep 16, 2024 at 07:51:31PM +0000, Anthony Ortega wrote: > Hi David, > > I had a question behind the intent of the versioning information > that gets compiled into the DTC programs. Apologies if a thread > exists on this already, but I had trouble finding one. I don't believe there's an existing discussion, but there is a mailing list it would be appropriate for: <devicetree-compiler@xxxxxxxxxxxxxxx>. I've added it to the CC. > I am trying to generate reproducible builds for a Linux environment > using Buildroot. One of the last packages that is giving me trouble > is the DTC programs. By "the DTC programs" I'm guessing you mean fdtget, fdtput and fdtoverlay primarily? Or do you mean the actual dtc binary itself too? > They all seem to intend to encode the git > version of the package they were pulled from. However, in a build > system such as Buildroot the DTC source is staged in such a way that > the git information is stripped away. While that in of itself is not > a problem, the problem is that it may be getting built in an output > directory that is within a larger git repository. Therefore, when > the setlocalversion script runs, it ends up pulling the version of > this larger git repository. Huh. > Is there any way that you recommend being able to override this > behavior in the DTC project? At the moment it appears to be the only > project with this unique issue. Which is a bit weird, since I'm pretty sure we copied that setlocalversion gunk from somewhere else (thuogh I forget where). > This is resulting in a different > binary executable for each commit of the build system. For > reference, I am referring to the following section of the Makefile: > > https://github.com/dgibson/dtc/blob/main/Makefile#L118-L119 I don't off hand know of a workaround for this.. but let's try a possible easy approach first. What happens if you build using meson instead of make? They're supposed to give the same results, but don't always, and I think meson has its own version logic which might be more sensible. -- David Gibson (he or they) | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you, not the other way | around. http://www.ozlabs.org/~dgibson
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