libXt build issue

[Justin C. Sherrill]

For some reason, libXt doesn't build on DragonFly 2.6/x86_64 but it does
on DragonFly 2.7/x86_64.  This kills a lot of packages in the bulk build.

Package                               Breaks Maintainer
-------------------------------------------------------------------------
x11/libXt                               2455 joerg at NetBSD.org

http://avalon.dragonflybsd.org/reports/x86_64/2.6/20100517.2338/libXt-1.0.7/build.log

It just seems to fail.  Can someone with DragonFly 2.7.x attempt building
it to see if it's my local problem and not actually related to DragonFly
version?