misc/179000: Updating graphics/png fails on make test

[roens]

>Number:         179000
>Category:       misc
>Synopsis:       Updating graphics/png fails on make test
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          update
>Submitter-Id:   current-users
>Arrival-Date:   Mon May 27 01:40:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     roens
>Release:        9.1-RELEASE-p3
>Organization:
>Environment:
FreeBSD fs 9.1-RELEASE-p3 FreeBSD 9.1-RELEASE-p3 #0: Mon Apr 29 18:27:25 UTC 2013     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
With an existing (working) install of libpng, it seems that the make test step of updating will fail. I think this is because make test ends up using (partly?) components of what is already installed, rather than just what has been built, ending up in a version mismatch situation. Some additional details can be found here:

http://forums.freebsd.org/showthread.php?p=201688

I typically use portmaster when installing/updating ports.
>How-To-Repeat:
Install graphics/png at one version, then update the package after a newer version has become available.
>Fix:
Remove the installed libpng, before "updating" to the newer version: `pkg delete -f graphics/png`

>Release-Note:
>Audit-Trail:
>Unformatted: