gcc 4.1.2 miscompiles uClibc 0.9.32

[u-uclibc-y2lt at aetey.se]

Thanks Denys,

I compiled master including your patch and it is not segfaulting
on a weak symbol (fine otherwise also, as much as I could see).

(I can not for the moment confirm that this fixed the problem while
compiling with 4.1.2 but) this works fine while compiling with 4.2.3.
Hope the previous compiler is not crucial to test. The old code looked
anyway very unreliable in the face of optimization and your change did
not break the functionality. Nice.

Regards,
Rune

On Thu, Sep 15, 2011 at 05:01:16PM +0200, Denys Vlasenko wrote:
> > Setting -O0 produces a sane exit.os and a usable library.
> 
> I committed a fix which uses:
> 
> +static __always_inline int not_null_ptr(const void *p)