From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yann E. MORIN <yann.morin.1998@free.fr>
Date: Sun, 15 Jan 2017 18:22:07 +0100
Subject: [Buildroot] [autobuild.buildroot.net] Your build results for
 2017-01-13
In-Reply-To: <1484408045.30558.1.camel@embedded.rocks>
References: <20170114072939.0FF8220B7E@mail.free-electrons.com>
 <1484408045.30558.1.camel@embedded.rocks>
Message-ID: <20170115172207.GG3552@free.fr>
List-Id: <buildroot.busybox.net>
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To: buildroot@busybox.net

J?rg, All,

On 2017-01-14 16:34 +0100, J?rg Krause spake thusly:
> Hi,
> 
> On Sat, 2017-01-14 at 08:29 +0100, Thomas Petazzoni wrote:
> > Hello,
> > 
> > This is the list of Buildroot build failures that occured on
> > 2017-01-13, and for which you are a registered architecture developer
> > or package developer. Please help us improving the quality of
> > Buildroot by investigating those build failures and sending patches
> > to
> > fix them. Thanks!
> > 
> > Build failures related to your packages:
> > 
> > ?????????arm |???????????????????????mpd-0.20 | http://autobuild.buil
> > droot.net/results/da259e57f96cf0dd6fbac9fe44826e93f986d9e9
> > ???????sparc |???????????????????????mpd-0.20 | http://autobuild.buil
> > droot.net/results/242b4cff0257f353ce6b2df744c51488dbc0d2c5
> > ???????sparc |???????????????????????mpd-0.20 | http://autobuild.buil
> > droot.net/results/8d50a025ffcc5b3408fa27f59f0cd896616dc2c6
> > ????????i686 |???????????????????????mpd-0.20 | http://autobuild.buil
> > droot.net/results/362233e40960f8f0410bf24404fa05ce38cbfb56
> > ???????nios2 |???????????????????????mpd-0.20 | http://autobuild.buil
> > droot.net/results/a5506440bd02726d6e3b0240ece876c73b92b546
> > ???????sparc |???????????????????????mpd-0.20 | http://autobuild.buil
> > droot.net/results/e964b1f0ac39ec9c14f5e3b368132d8dc671c249
> > 
> 
> The error message is:
> 
> error: 'exception_ptr' in namespace 'std' does not name a type
> 
> The problem is related to this bug report [1]. Both std::future and
> std::exception_prt are only enabled in libstdc++ if
> 'ATOMIC_INT_LOCK_FREE > 1'. std::exception_prt is only supported for
> targets with always-lock-free atomics for int. This is a long-standing
> issue in the libstdc++ and was finally fixed in GCC trunk r244051
> [2][3] and will be available in GCC 7.0.
> 
> Any suggestions how to handle this build error?
> 
> 1) Disable for the targets concerned and wait for GCC 7.0?
> 2) Backport the patch?

The patch is not small... :-(

So I'd say we disable it on archs that do not have the lock-free int.

Regards,
Yann E. MORIN.

> [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735
> [2] https://gcc.gnu.org/viewcvs/gcc/trunk/libstdc%2B%2B-v3/include/std/
> future?view=log&pathrev=244051
> [3] https://github.com/gcc-mirror/gcc/commit/c45be7f1aef92f2ea7363cbc46
> 27f943b83ca902
> 
> Best regards,
> J?rg Krause
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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