Bug 176433

I found a depend error in the dri-7.6.1_2 port. It lists ptyhon32 amd py32-libxml2 as dependancies. when python3.2 is already installed, dri-7 will not compile. It creates various errors. It will not allow py32-libxml2 to install,
with an "already installed" error, when that is bypassed with a "force-pkg-register" the continued compile begins to generate syntax and missing file errors. After checking the faq, mail lists and forums, I found that the dependancies for python 32 were few, and didn't include dri-7. With python32 installed first, an inherent default version issue prevented the make command in the dri-7 from installing the correct version of pyXX-libxml2. It keeps trying to install the py32-libxml2, and stops at the version conflict.
The make search name=dri-7.6.1_2 returns the B/R-deps lists and both python32-3.2.3_1 and py32-libxml2-2.7.8_2 are listed as B-deps. As you know, "make" follows the rules. There is an issue, but I can't solve it, I'm sure you can. There was to much work on attempts to get through it, to list everything here.

Fix: 

Before any other ports are installed, make the dri-7 port. It installs the correct versions of python and pyXX-libxml2. If both python versions are on the
system, both must be removed(make deinstall), along with whatever version of pyXX-libxml2 is there. Then dri-7 will install the correct ports as dependants.No other fix was found.

Extra technical details can be sent, if they are needed. A longer text was written, but can't be pasted so, I"ll put it in a forum post.

SirDice wrote this, which reminded me that I saw the python B-deps listing.

forums.freebsd.org/showthread.php?t=33026&highlight=py-libxml2 comment/post #13
How-To-Repeat: Install python32-3.2.3_1 as the first port, after a new install. Then try to install dri-7.6.1_2,2. If you install python27, as a "make depend" does,
you will not finish the build. As I wrote, the errors vary, depending on how you try to bypass the py32-libxml2 error.