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. cheers, DaveK