Building SageMath 6.8: gf2x, ncurses error in ArchLinux

[fidelbc]

Hello,

I'm trying to build sage on arch linux:

$ uname -a

Linux 4.1.2-2-ARCH #1 SMP PREEMPT Wed Jul 15 08:30:32 UTC 2015 x86_64 GNU/Linux

The packages that seem to fail to build are gf2x and ncurses (please see attached logs).

I usually build sage using

MAKE="make -j4"

Any help on trying to get the build to succeed are greatly appreciated!

Fidel

PS I used to be able to build sage without any issues, but after around v6.6 this was no longer the case. Do you think these are OS specific issues?

[Volker Braun]

Shipping with GCC 5.2.0 is probably a bit too risky on the Arch side... Can you try

make distclean && SAGE_INSTALL_GCC=yes make

[fidelbc]

Thanks for the advice Volker!

Unfortunately now gcc is failing to build.

[William Stein]

(corrected subject)


---------- Forwarded message ----------
From: William Stein <wst...@gmail.com>
Date: Wed, Jul 29, 2015 at 12:08 AM
Subject: Fwd: message for sage-support
To: sage-support <sage-s...@googlegroups.com>




---------- Forwarded message ----------
From: paul zimmermann <Paul.Zi...@inria.fr>
Date: Tuesday, July 28, 2015
Subject: message for sage-support
To: wst...@gmail.com


Hi William,

please could you post the message below for me, in case it does not reach
sage-support?
Thanks,
Paul

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>
> Hello paul.zi...@inria.fr,
>
> We're writing to let you know that the group you tried to contact (sage-support) may not exist, or you may not have permission to post messages to the group. A few more details on why you weren't able to post:
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> Message-Id: <mwoaiva...@tarte.loria.fr>
> From: paul zimmermann <Paul.Zi...@inria.fr>
> To: sage-s...@googlegroups.com
> Subject: Building SageMath 6.8: gf2x, ncurses error in ArchLinux
>
> Hi,
>
> I am a developer of gf2x. I looked at the log file. It seems the TC3 result
> is wrong up from degree 703. Please could you try to compile gf2x with a
> previous version of gcc (say 4.9.x), by running the following, and send us
> the corresponding log? You might also want to try again with GCC 5.2.0 to
> check the error is deterministic, and is independent from the Sage patches.
>
> $ wget https://gforge.inria.fr/frs/download.php/file/30873/gf2x-1.1.tar.gz

> $ tar xf gf2x-1.1.tar.gz
> $ cd gf2x-1.1
> $ ./configure
> $ make
> $ make tune-lowlevel
> $ make tune-toom TOOM_TUNING_LIMIT=100
>
> Best regards,
> Paul Zimmermann
>



--
Sent from my massive iPhone 6 plus.


--
William (http://wstein.org)

[fidelbc]

Hello Paul,

Unfortunately I don't have access to GCC 4.9.x. I think after Volker's suggestion GCC 4.9.2 was supposed to be built, but it failed.

I did try to build the source you suggested using GCC 5.2.0 and it failed again. Please find attached the compilation log (the error seems to be the same).

Best,
Fidel

[fidelbc]

These seem to be known issues with gcc version >= 5, see [1] and [2].

A possible workaround is to use the attached patch (adapted to fix the issue for gcc 5.2.0).

For anyone using ArchLinux with llvm installed and trying to follow Volker's suggestion, you may want to try using

$ export LD_PRELOAD=/usr/lib/libstdc++.so.6

before compiling (as suggested in [3]). This will allow you to compile gcc 4.9.2 without any issues.

Fidel

[1]: http://trac.sagemath.org/ticket/18580

[2]: http://trac.sagemath.org/ticket/18301
[3]: https://aur4.archlinux.org/packages/gcc48/

[fidelbc]

I have compiled the sage 6.8 source code twice. Just wanted to add that the two proposed solutions from above work.