>   I don't know that anyone's solved this yet.

It's very straightforward.  build two copies: one as a tool to run
during the build, and one as a program to be installed later.

> 
>     Assar> 5. I don't quite understand how this is supposed to fit into
>     Assar>    crypto-intl/Makefile* and src/Makefile*.  Anyone care to enlighten me?
> 
>   I think that this is not yet decided.

No, it's very well defined.

Directories in src/crypto-foo/bar which "belong" as subdirectories of
src/bar should be listed in src/crypto-foo/bar/Makefile.frag

						- Bill