branch wip-build-systems-gexp created (now 4c2ade2)

[Ludovic Courtès]

civodul pushed a change to branch wip-build-systems-gexp
in repository guix.

        at  4c2ade2   store: Add a functional object cache and use it in 
'lower-object'.

This branch includes the following new commits:

       new  f887a9a   gnu: bootstrap: Move 'use-modules' forms to the beginning 
of build expressions.
       new  dc75026   build-system: Rewrite using gexps.
       new  6f95773   gexp: Micro-optimize sexp serialization.
       new  5f297a0   monads: Micro-optimize 'foldm'.
       new  042da62   tests: Add 'test-assertm' to (guix tests).
       new  e207a49   packages: Turn 'bag->derivation' into a monadic procedure.
       new  4c2ade2   store: Add a functional object cache and use it in 
'lower-object'.

The 7 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.