[gdb 19981224] Enable linking gdb against shared libbfd

Stan Shebs shebs@cygnus.com
Wed Dec 30 13:56:00 GMT 1998


   From: Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
   Date: Tue, 29 Dec 1998 20:19:40 +0100 (MET)

   The following patch is a first shot at linking gdb 19981224 against a
   shared libbfd (tried on IRIX 6.2).  It has a couple of shortcomings:

Thanks, we'll take a look at it.

   * libtool support was added manually to gdb/Makefile.in.  It currently
     lacks the libtool clean targets usually generated by automake's libtool
     support.  This will happen naturally once the gdb Makefile is converted
     to use automake.

We don't have any concrete plans to use automake for GDB, although it's
been talked about.

   * Using a shared libbfd isn't currently very useful since it doesn't
     support proper (in the libtool sense) interface versioning, without
     -release $(VERSION).  Since any release of binutils and gdb comes with
     it's own version of libbfd, there cannot happen any sharing, at least not
     between binutils and gdb.  Are there any plans to convert libbfd to
     proper versioning?  I doubt it is easy, if at all possible, given it's
     constant state of flux.

Exactly, which is why there hasn't been much incentive to try to make the
library shared.  In theory, BFD would only need an internal change from
to time, and would vary little if at all in its interfaces, but in
practice, BFD has to know a number of details about minor OS revisions
and semi-private file formats, so it's proven harder to stabilize than
originally envisioned.

To answer the specific question, I don't know of any plans to do
interface versioning for BFD.  I've cc'ed the bfd list to see if
anyone has more to say.

							Stan



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