Mathinlines and GCC

[Joseph S. Myers]

On Wed, 2 May 2012, Andreas Jaeger wrote:

> One more question:  why do we explicitely call the builtin via an inline
> instead of letting gcc do this?
> 
> here's an example from the i386 header:
> #if __GNUC_PREREQ (3, 4)
> __inline_mathcodeNP2_ (long double, __atan2l, __y, __x,
> 		       return __builtin_atan2l (__y, __x))

Since this refers to __atan2l, maybe it's about mapping __atan2l to the 
built-in function (whereas GCC would only do that for atan2l, not 
__atan2l)?  Though that's hardly relevant unless __atan2l is used in other 
inlines or within glibc.

-- 
Joseph S. Myers
joseph@codesourcery.com