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Re: Additional link flags for HP aCC and SGI CC


From: Bob Friesenhahn
Subject: Re: Additional link flags for HP aCC and SGI CC
Date: Tue, 24 Aug 2004 09:55:39 -0500 (CDT)

On Tue, 24 Aug 2004, Gary V. Vaughan wrote:

The main barrier to providing a good interface to many of the features
we are obviously missing is our lack of support for multilibs.  I think
that if we do that right, abi support, and thread support would fall
out pretty much of their own accord.  Unfortunately, none of the libtool
developers use multilib, and I'm not aware of a libtool using project
that would need it (at least until I saw Bob's message about gcc multilib
builds just now).

It seems to me that the need for multilib has little to do with project requirements. It has to do with target environment/install requirements. Some usages never have a need for multilib, while others benefit. It would certainly be helpful to me if my project could build both static & shared libraries for both 32 bit and 64 bit SPARC from a single build. Likewise, Opteron users would probably want to build 32 bit and 64 bit libraries from a single build. Even if multiple targets are not generated by a single build, a multilib install usually uses special library naming or install directories, and libtool can support/enforce that.

Multilib does present some issues for projects though. They need to be prepared for it. If a single set of headers does not work for all multilib targets, then special headers may need to be installed for each multilib target.

Bob
======================================
Bob Friesenhahn
address@hidden
http://www.simplesystems.org/users/bfriesen




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