ports/175299: graphics/dri fails to build with clang

[Simon]

>Number:         175299
>Category:       ports
>Synopsis:       graphics/dri fails to build with clang
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 14 18:50:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Simon
>Release:        9.1-RELEASE
>Organization:
>Environment:
FreeBSD x 9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec  4 09:23:10 UTC   2012     root at farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
The graphics/dri port will not build with clang currently.
>How-To-Repeat:
With:
CC=clang
CXX=clang++
CPP=clang-cpp
in /etc/make.conf, cd /usr/ports/graphics/dri; make
>Fix:
Set the makefile to require GCC (or find out why it's not building)

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