clang+libc++ using missing powl

[Baptiste Daroussin]

On Thu, Sep 05, 2013 at 09:52:13AM +0100, David Chisnall wrote:
> On 4 Sep 2013, at 23:38, Baptiste Daroussin <bapt at freebsd.org> wrote:
> 
> > As a result we have a lot of fallouts of ports complaining about:
> > undefined reference to `powl'
> > 
> > It seems like libc++ is relying on a function we don't have yet in libm, am I
> > missing something?
> 
> I've attached a diff that I'd like to commit to msun that should allow these things to link.  This:
> 
> - Provides thin wrappers around the 8 missing libm functions that libc++ exposes that just call the double versions
> 
> - Makes these weak references, so other libraries can replace them with more precise versions if required
> 
> - On platforms where long double is greater precision than double (e.g. x86), it emits a linker warning when they are referenced
> 
> These can then be replaced by proper versions as they become available (at which point the linker warnings will go away).
> 
> David
> 

Thanks I'll test it on my next full run, probably tomorrow.

regards,
Bapt
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