Your message dated Tue, 6 Sep 2022 22:56:15 +0200
with message-id <yxez76be9q9d6...@aurel32.net>
and subject line Re: Bug#798691: libc6-i686: sin() sometimes broken
has caused the Debian Bug report #798691,
regarding libc6-i686: sin() sometimes broken
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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798691: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=798691
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--- Begin Message ---
Package: libc6-i686
Version: 2.19-18+deb8u1
Severity: important
Hi,
I was trying to create a local backport of python-cffi onto
jessie/i386.
On a system with libc6-i686 installed, I get a failure in
the self test of the build:
> assert library.sin(12.3) == math.sin(12.3)
E assert 0.8444952930965295 == -0.26323179136580094
Uninstalling libc6-i686 lets the full build and tests run
through.
Something very related has already happened before:
https://www.sourceware.org/bugzilla/show_bug.cgi?id=16625
This suggests a compiler bug in gcc 4.8. But jessie is
compiled with 4.9, so it must be something a bit different.
Severity: important as giving wrong results to math
functions isn't something trivial, really and can affect
multiple unrelated components/packages.
Cheers
Christian
--
www.cosmokey.com
--- End Message ---
--- Begin Message ---
Version: 2.21-0experimental0
On 2015-09-13 16:26, Aurelien Jarno wrote:
> On 2015-09-11 20:33, Christian Tacke wrote:
> > Package: libc6-i686
> > Version: 2.19-18+deb8u1
> > Severity: important
> >
> > Hi,
>
> Hi,
>
> > I was trying to create a local backport of python-cffi onto
> > jessie/i386.
> >
> > On a system with libc6-i686 installed, I get a failure in
> > the self test of the build:
> >
> > > assert library.sin(12.3) == math.sin(12.3)
> > E assert 0.8444952930965295 == -0.26323179136580094
> >
> > Uninstalling libc6-i686 lets the full build and tests run
> > through.
> >
> > Something very related has already happened before:
> > https://www.sourceware.org/bugzilla/show_bug.cgi?id=16625
> >
> > This suggests a compiler bug in gcc 4.8. But jessie is
> > compiled with 4.9, so it must be something a bit different.
>
> No, the glibc on jessie is actually built with gcc 4.8, as gcc 4.9
> introduces some regression on the pthread cleanup functions. This
> means it's very likely to be the same bug.
This is a bug in gcc 4.8 that has been fixed in gcc 4.9, which is used
to build the glibc since version 2.21-0experimental0. I am therefore
closing the bug accordingly.
Regards
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurel...@aurel32.net http://www.aurel32.net
--- End Message ---
