another powerpc APUinfo patch

[Nathan Sidwell]

this is a followup to
2010-02-08  Nathan Sidwell  <nathan@codesourcery.com>

	* elf32-ppc.c (ppc_elf_begin_write_processing): Allow empty
	apuinfo sections, only scan input sections once and reuse the
	buffer.

I've now met a case where there were (only) multiple empty APUinfo sections in 
the input.  In such a case we end up with an empty list of APU attributes and 
then consequently don't think we need to do anything special writing out the 
matching output section.  We end up attempting to concatenate the input sections.

This patch adds an explicit boolean indicating that we met APUinfo sections in 
the input.  If we do, we always synthesize an APUinfo output section even if it 
has not attributes (just the header).  I didn't think it worth while optimizing 
the case I'd hit -- hey, if the producer can't be bothered, why try harder?

built and tested on powerpc-elf, ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::         CodeSourcery

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: ppc.diff
URL: <https://sourceware.org/pipermail/binutils/attachments/20100401/03265a7b/attachment.ksh>