Hello Bernhard, "Bernhard M. Wiedemann via rb-general" <rb-general@lists.reproducible-builds.org> skribis:
> in openSUSE there are some packages that so far refuse to build > reproducibly. The common theme around them is that they use scheme or > lisp to produce binaries with a 'dump' command. I think this practice is vanishing. For one, Emacs had an ‘unexec’ function that produced an ELF executable containing an image of its heap at the time the function was called; this was replaced by a portable and reproducible mechanism in Emacs 27, released in August 2020. [...] > The list of our packages I think are affected by this is: > clisp > scheme48 > chezscheme > emacs > maxima > scsh > xindy > > Most distros seem to be affected by this: > http://ismypackagereproducibleyet.org/?pkg=scheme48 > http://ismypackagereproducibleyet.org/?pkg=emacs surprisingly shows as > reproducible in Archlinux, but I could not figure out why. > maxima also shows as green there. > > Can we get them reproducible? Or can we drop+replace these > implementations with guile? Scheme implementations are all vastly different, notably because they implement different things: the standards were historically very minimal, so to do practical things, you had to implement custom extensions. Because of that, you can’t just use one “Scheme” implementation as a drop-in replacement for another one. The implementations are also very different: for instance, Chez implements a native ahead-of-time compiler whereas Guile has bytecode compilation plus just-in-time compilation. Thus problems and solutions for one implementation are unlikely to translate to other implementations. That said I’m surprised about Emacs, this needs more investigation… HTH, Ludo’.