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[Gcl-devel] Re: gcc-3.2 problems in compiling GCL

From: Richard Zidlicky
Subject: [Gcl-devel] Re: gcc-3.2 problems in compiling GCL
Date: Wed, 19 Feb 2003 00:31:14 +0100
User-agent: Mutt/1.4i

On Tue, Feb 18, 2003 at 04:46:46PM -0500, Camm Maguire wrote:
> Greetings, and thanks for the insight.  GCL does a subbuild of part of
> GMP.  With the default configure script canonical host of
> m68k-unknown-linux-gnu, gmp3 adds -m68000 to the command line.

this is slightly broken - there has never been 68000 support
in Linux.

> Perhaps the autobuilders should use m68020-unknown-linux-gnu as the
> lowest common denominator?

this would work but not very well on 68060 models though.. here
are the options:
  a) use m68k-*linux WITHOUT -m68000 flag. Will loose some
     performance on 68020-40 models, nearly optimal for 68060
  b) m68020-linux will loose *lots* of performance on 68060 models.
  c) compile 2 versions of the library/program for 20-40 or 60

(a) is pretty acceptable, (b) would be probably the worst alternative. 
(c) would be nice and I think it is time to use multilibs for m68k-linux.


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