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Date: Tue, 14 Oct 2014 17:33:42 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: RE???[BUG][math]build musl with optimizing flags, some
math functions are broken.
* bobodog <8192542@...com> [2014-10-14 15:09:45 +0800]:
> Further confirmation, the problem is -ffast-math flag, just remove this flag, all tests passed, please fix this bug, the openbsd's msun math library, have not any problem with this flags.
>
how did you verify that openbsd "have not any problem with this flag" ?
(without looking at your methodology i can guarantee that openbsd
msun math library is completely broken with gcc -ffast-math too
unless openbsd explicitly disabled this option in their compiler..
they maintain their own compiler so they can implement -ffast-math
as a no-op, but a modern unpatched gcc with -ffast-math breaks all
math functions which depend on exact ieee arithmetics)
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