scheme and lisp

[Bernhard M. Wiedemann]

Hi,

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.

e.g. for scheme48 I extracted this reproducer:

pushd ~/rpmbuild/BUILD/scheme48-*/ps-compiler
     ../go -h 20000000 -a batch <<- 'EOF'
         ,config ,load ../scheme/prescheme/interface.scm
         ,config ,load ../scheme/prescheme/package-defs.scm
         ,exec ,load load-ps-compiler.scm
         ,in prescheme-compiler prescheme-compiler
         ,user (define prescheme-compiler ##)
         ,dump ../ps-compiler.image "(Pre-Scheme)"
         ,exit
EOF

I also know that guile implements scheme and builds reproducibly (with 
-j1). So there must be a way to do it right.

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?

I'd appreciate some insight from this knowledgeable crowd.

Ciao
Bernhard M.
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