adding extra libraries in branches...

adding extra libraries in branches...

[Basile STARYNKEVITCH]

Hello All

I am trying to clean up the configure.ac & Makefile.in inside the MELT 
branch. [Several people rightly complained about that].

But I am not an autoconf expert. I welcome a big lot the recent update 
to autoconf 2.64

I have no clear understanding of:

how to add an extra libary (free software) into the middle end [that is 
is, into cc1 binary) Apparently there are several cases:

* the extra library is [L]GPL-ed & FSF-owned & blessed somehow by I 
don't know who, eg GDBM or readline, so could be handled as MPFR.

* the extra library is LGPL-ed but not FSF-owned, but is required by the 
branch

* the extra library is optional to the branch


Any practical hints are very welcome. If someone have time to explain it 
on the wiki or the mailing list, I would be delighted.

BTW, I am trying to
   make PPL & plugin machinery mandatory in the MELT branch
   adding GDBM inside [1].

Regards.

NB: the motivation for GDBM is to perhaps be able to persistently store 
data. http://gcc.gnu.org/ml/gcc/2009-09/msg00053.html

-- 
Basile STARYNKEVITCH         http://starynkevitch.net/Basile/
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