Re: [PATCH] Check compiler version, SMP and PREEMPT.

[Kai Germaschewski]

On Mon, 13 Jan 2003, Daniel Jacobowitz wrote:

> On Mon, Jan 13, 2003 at 04:13:19PM +1100, Rusty Russell wrote:
> > Linus, please apply if you agree.
> > 
> > Tridge reported getting burned by gcc 3.2 compiled (Debian) XFree
> > modules not working on his gcc 2.95-compiled kernel.  Interestingly,
> > (as Tridge points out) modversions probably would not have caught the
> > change in spinlock size, since the ioctl takes a void*, not a
> > structure pointer...
> 
> > D: and compiler version (spinlocks change size on UP with gcc major,
> > D: at least).
> 
> Why does this happen?  It doesn't look like it should, but I only
> skimmed the headers checking...

I suppose it's due to the

	#if (__GNUC__ > 2)
	[...]

in include/linux/spinlock.h, i.e. it's not at all gcc's fault.

--Kai