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Re: Warning about zero-sized dynamic symbols
- From: Alan Modra <amodra at gmail dot com>
- To: Ian Lance Taylor <iant at google dot com>
- Cc: binutils at sourceware dot org
- Date: Sat, 10 Mar 2012 17:14:52 +1030
- Subject: Re: Warning about zero-sized dynamic symbols
- References: <mcrobs5n7bw.fsf@dhcp-172-18-216-180.mtv.corp.google.com>
On Fri, Mar 09, 2012 at 07:05:07AM -0800, Ian Lance Taylor wrote:
> Alan, back in http://sourceware.org/ml/binutils/2005-08/msg00279.html
> you added an error to GNU ld about dynamic variables that have a zero
> size. The Go language permits global variables to have a zero size, and
> that is even useful as a way of aggregating methods (e.g., in the
> encoding/binary package in Go's standard library the variables BigEndian
> and LittleEndian have a zero size). I've worked around the problem in
> the gccgo compiler, but thinking about it I don't think the error is
> appropriate.
I think I added that code to fix a ld.so segfault when handling a copy
reloc for a zero size symbol. So what should ld do here? Make a zero
size entry in dynbss but omit any copy reloc?
--
Alan Modra
Australia Development Lab, IBM