[PATCH] Fix test-tgmath failure on alpha

[Ulrich Drepper]

Richard Henderson <rth@twiddle.net> writes:

> The whole __NO_LONG_DOUBLE_MATH thing should only be set while
> building glibc.  Afterward, the ##l symbols exist as aliases in libm.

We have the aliases but not the prototypes.  This way we can introduce
the long double functions once the correct type gets introduced.

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