Corinna Vinschen via Newlib <newlib@sourceware.org> writes:

> You can't do that.  gamma_r/gammaf_r/lgamma_r/lgammaf_r are BSD
> functions.  They have been exported by Cygwin since 2001.  The entry
> points need to be kept available with unchanged semantics.

They changed on accident in 2002 -- gamma_r *used* to be an alias for
lgamma_r and was changed to be a (broken) alias for tgamma.

-- 
-keith