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Re: GCC 4.4.0-rc1 available
On Wed, Apr 15, 2009 at 7:34 AM, Dave Korn
<dave.korn.cygwin@googlemail.com> wrote:
> Jakub Jelinek wrote:
>> On Wed, Apr 15, 2009 at 03:27:01PM +0100, Dave Korn wrote:
>>>> It does look like a Cygwin specific issue.
>>> ? Can you tell me whether Linux treats COMMON as a separate section with its
>>> own alignment, or otherwise takes steps to ensure it has a base alignment that
>>> the compiler can assume? ?Otherwise I expect I need to look at the cygwin
>>> definitions of the ASM_OUTPUT_COMMON* macros.
>>
>> In ELF each STT_COMMON symbol has both size (st_size) and alignment
>> (st_value) and the linker is of course required to lay out all the common
>> symbols in a way that their alignment requirements are satisfied.
>
> ?Ah, thanks. ?I think probably PE doesn't support that and will need explicit
> .align pseudo-ops inserted in the assembly. ?I'm AFK for a few hours now but
> will pursue this later tonight.
>
If your COMMON doesn't support alignment, you may need to use .bss with
.align.
--
H.J.