Issues with readline and ncurses

[Travis Glenn Hansen]

From what I can tell libtinfo.so has long been deprecated in favor of libncurses.so. The binary builds of xtra server link against libncurses.so.5 why not xtradb cluster?

Thanks!

[Alexey Bychko (abychko)]

confirmed for centos-6

[Ignacio Nin (ignacio-nin)]

The binary is linked against ncurses, but for CentOS (where the binary is built) libncurses.so is what links against libtinfo.so. This may bring issues in systems where libtinfo symbols are contained in libnurses and no libtinfo.so library is provided separately.

A viable solution for this would be to link statically against ncurses.

[Raghavendra D Prabhu (raghavendra-prabhu)]

There are issues with readline in upstream Percona Server as well (which were not fixed in earlier issues), adding that as well.

[Raghavendra D Prabhu (raghavendra-prabhu)]

The issues are as follows:

a) Not only the binary builds (centos 6, on which PXC is, PS binary builds are on centos5, hence are not), but the mysql client binaries in RPM and DEB are also linked with libtinfo (which is deprecated). However, libreadline on these platforms link against libtinfo anyways (or libncurses does) so this should be fine.

b) mysql client binary is also not linked to libncursesw, hence
multi-byte capability may be broken.

c) The reason centos6 builds are affected is that, symbol `tputs` (the one
checked in readline.cmake) is not provided by libncurses but by
libtinfo (which libncurses also links against).

=================================================================

So, for distro builds, it should be fine except multi-byte may not work
(which I will file separate bug against).

As far as binary builds are concerned, building against
system readline-static (not builtin) should do.

[Raghavendra D Prabhu (raghavendra-prabhu)]

Removed PS since I will separate bug for multi-byte.

[Raghavendra D Prabhu (raghavendra-prabhu)]

Looks like multi-byte is provided elsewhere, so this shouldn't be
an issue.

[Raghavendra D Prabhu (raghavendra-prabhu)]

Filed a related bug:
https://bugs.launchpad.net/percona-xtradb-cluster/+bug/1245817

Due to certain issues, libtinfo is stil linked into mysql even if built with libreadline.

Regarding libtinfo itself, even if it is deprecated, it is linked into most of the libraries, not to mention libncurses and libreadline themselves. So, you should report this part of the bug upstream (by upstream I mean to centos/rhel/deb/ubuntu).

As far as fixing this goes, I will make PXC build on centos5 itself like PS, so this should be fixed.

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXC-1132