pkg/46254: libxml2 fails to avoid getting linked against libpthread on SunOS

[filip%hajny.net@localhost]

>Number:         46254
>Category:       pkg
>Synopsis:       libxml2 fails to avoid getting linked against libpthread on 
>SunOS
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Mar 24 21:45:00 +0000 2012
>Originator:     Filip Hajny
>Release:        
>Organization:
Joyent
>Environment:
SunOS af9b008b-434d-4d53-af5c-bb9ee6ea4746 5.11 joyent_20111206T013343Z i86pc 
i386 i86pc
>Description:
The change implemented by drochner that tries to avoid linking against 
libpthread - without disabling it altogether - doesn't work on SunOS, where 
libpthread always gets linked, and the package fails the crude post-install 
test.
>How-To-Repeat:
Try to build libxml2-2.7.8nb8 or later on SunOS.
>Fix: