Bug #76654 bigint and other tests fail with gcc 5.0

Description:
When building mysql-5.6.24 with gcc 5.0 on Fedora 22 or later some tests fail on big integers operations, for example bigint test case.

Full build log is available here:
https://kojipkgs.fedoraproject.org//work/tasks/3420/9443420/build.log

How to repeat:
Run bigint test or a small reproducer:

  MySQL [(none)]> select -(-9223372036854775808);
  +-------------------------+
  | -(-9223372036854775808) |
  +-------------------------+
  |               854775808 |
  +-------------------------+

Which is obviously wrong.

Patch for bigint on gcc 5

Attachment: gcc5.patch (application/octet-stream, text), 1.57 KiB.

I have just appended our patch for this issue, which should also make it into the next release.

Hello Honza Horak,

Thank you for the report.
This is duplicate of internal bug Bug 20768820 - MAIN.BIGINT TEST FAILS WHEN BUILT WITH GCC 5 IN RELEASE BUILD which is fixed in 5.6.25, 5.7.8-rc and 5.8.0.

Thanks,
Umesh

Bug#20768820 MAIN.BIGINT TEST FAILS WHEN BUILT WITH GCC 5 IN RELEASE BUILD

has been fixed in 5.6.25, 5.7.8 and 5.8.0.

Please, see the Sergei's comment at https://mariadb.atlassian.net/browse/MDEV-7973

Consider applying the following patch instead:
https://github.com/MariaDB/server/commit/ae18a28500974351cf42fa3cac67c83e0647d510

We will use our internally developed patch for this.

commit 49329220ea0f40e42344cef39b0d9b72bd5f557f
Author: Tor Didriksen <tor.didriksen@oracle.com>
Date:   Wed Apr 8 16:53:55 2015 +0200

    Bug#20768820 MAIN.BIGINT TEST FAILS WHEN BUILT WITH GCC 5 IN RELEASE BUILD
    
    Problem: with gcc5 in optmized mode, (- LLONG_MIN ) yields integer overflow.
    Fix: In ull2dec() change the loop which counts the number of decimal_digit_t's
    (cherry picked from commit b37d8bcc24f82f8e15c5f6e2243c8937af74acb7)