On Wed, Oct 08, 2014 at 08:54:07PM +0200, Michael Büsch wrote:
> Another thing is the sincos configure test we do.
> What does it test? Userspace or kernelspace? Or both?

Configure tests userspace.  It's always assumed there's no sincos in
kernel space -- sincos.c:
 22 #if defined(__KERNEL__)
 23 #undef HAVE_SINCOS
 24 #endif

A slight complicating factor is HAVE___SINCOS, which is again determined
by configure checking userspace; if HAVE___SINCOS were defined then I
think the kernel would end up without a definition of sincos.  But on my
debian 7 system, the configure result for the function __sincos is 'no',
so this doesn't come up.

> What happens, if I have a userspace with sincos and kernelspace
> without sincos (like in my case)? Does it work correctly and compile in
> the workaround for kernelspace posemath and leave it out for userspace
> posemath?

Yes, that is what is intended to happen.

Jeff

> 
> Please CC me in replies, so I can respond faster without reading the list.
> 
> -- 
> Michael



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