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Re: -no-undefined support for GNU/Linux
From: |
Ralf Wildenhues |
Subject: |
Re: -no-undefined support for GNU/Linux |
Date: |
Wed, 18 Mar 2009 08:00:07 +0100 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
Hi Mike,
* Mike Frysinger wrote on Wed, Mar 18, 2009 at 06:22:18AM CET:
> in a project for a LD_PRELOAD module, i like to use -no-undefined because
> undefined symbols will not work in it at all. i would like to see a link
> error up front rather than random runtime failures. googling around shows
> patches from 6-8 years ago. they refer to an older glibc bug (which at this
> point makes it a bug on decade old systems) that should be accounted for, but
> otherwise there wasnt any response to the proposed patch. is there any real
> reason for Linux not supporting something so basic as -no-undefined ?
> especially considering it only needs one linker flag (-Wl,--no-undefined) ?
IIRC lots of things would break on Linux if we used -Wl,--no-undefined.
I don't recall the details, but I'm sure glibc wasn't the only problem
child in this area.
Before we do this, I'd like to see some real-world exposure of it, say,
using it to build the better part of a distribution or so. Running the
Libtool testsuite with it would be a good starter. :-)
Cheers,
Ralf