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From: Szabolcs Nagy <nsz@port70.net>
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Subject: Re: libm
Date: Fri, 27 Jan 2012 17:02:09 +0100
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* Szabolcs Nagy <nsz@port70.net> [2012-01-23 20:12:15 +0100]:
> * Rich Felker <dalias@aerifal.cx> [2012-01-23 12:07:15 -0500]:
> > On Mon, Jan 23, 2012 at 05:41:52PM +0100, Szabolcs Nagy wrote:
> > > many functions are the same in glibc and the various
> > > bsd libcs (they are mostly based on fdlibm, but glibc
> > > 64bit double precision functions are from the gpl
> > > licensed libultim)
> > 
> > You really mean double, not extended? That's odd since fdlibm covers
> > double.. I wonder when/why they switched.
> > 
> 

sorry libultim is lgpl
the source tree contains a gpl license for some reason, but all
source comments say lgpl, both in glibc and the original files

meanwhile i compared some implementations
openbsd, freebsd and glibc are worth to look at
(netbsd and bionic libms seem to be less maintained)