On Wed, Apr 15, 2009 at 7:34 AM, Dave Korn <dave.korn.cyg...@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.
