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Re: Mathinlines and GCC

On 05/02/2012 10:03 PM, Joseph S. Myers wrote:
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.

You're right, this is for __atan2l which is used internally in glibc in a few locations. Not worth exporting at all - but seems there is no better way to place it.

Andreas
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