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Re: Does a zero-sized object in BSS go away?
> Date: Thu, 19 Jun 2003 14:19:39 -0400 (EDT)
> Cc: binutils@sources.redhat.com
> From: Kazu Hirata <kazu@cs.umass.edu>
> Hi Geoff,
>
> > The linker should assign an address to it. However, some object file
> > formats can't represent zero-sized common objects, in which case the
> > assembler should probably report an error if someone tries to create one.
>
> Thanks. That means some valid C using a zerosized object program
> may not be represented in those formats. Sigh...
ISO C programs can't create zero-size objects, but you can do it in
GCC.
I think there's no way to tell if an object, which the program thinks
is zero-size, actually has non-zero size. So you could just make the
common symbols have size 1 if the user asks for size 0...
--
- Geoffrey Keating <geoffk@geoffk.org>