[tex-live] share sub-directory

[Karl Berry]

Hi Peter,

    It would be interesting, how the texmf.cnf is generated and/or from where
    it comes.

The texmf.cnf in Master/texmf/web2c/ is not generated from anywhere.  It
is maintained by hand, although I try to keep it in sync with
Build/source/texk/kpathsea/texmf.in.

The texmf.cnf that is generated by a build of the sources is not used
anywhere in TeX Live itself.  (That is the one you are talking about, I
take it.)  It is generated by rules in kpathsea/Makefile.in, which
basically substitute most of Make's directory-related variables.  It is
nothing terribly complex.

I would expect you to be able to get the paths you want by suitable
configure options, e.g., --datadir=$PREFIX.  (That is what our
Build/source/Build script does.)  The $prefix/share default comes from
the definition of datadir in Autoconf.

Best,
karl