pkg/50358: chat/weechat-1.2nb: failed to load any python plugin

[netbsd.org%yegle.net@localhost]

>Number:         50358
>Category:       pkg
>Synopsis:       chat/weechat-1.2nb: failed to load any python plugin
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 22 19:15:00 +0000 2015
>Originator:     yegle
>Release:        
>Organization:
>Environment:
>Description:
I'm using pkgsrc on Ubuntu 14.04 LTS. I can install chat/weechat without problem, but running weechat against a profile which loads at least one python plugin failed.

12:10 =!= Error: unable to load plugin "/usr/local/google/home/ych/pkg/lib/weechat/plugins/python.so": /usr/local/google/home/ych/pkg/lib/weechat/plugins/python.so: undefined symbol: forkpty

Strace of running weechat available if it helps: http://paste.ubuntu.com/12896352/
>How-To-Repeat:
1. Find an Ubuntu 14.04 installation
2. bmake install in pkgsrc/chat/weechat directory
3. prepare a weechat configs that loads a Python script (e.g. run weechat from APT, install on python script, setup to load it on weechat startup)
4. run weechat from pkgsrc, there will be an error:
12:10 =!= Error: unable to load plugin "/usr/local/google/home/ych/pkg/lib/weechat/plugins/python.so": /usr/local/google/home/ych/pkg/lib/weechat/plugins/python.so: undefined symbol: forkpty
>Fix: