rxvt-unicode fails build 9 stable i386

[Robert]

On Fri, 27 Jul 2012 11:10:23 +0200
Guido Falsi <madpilot at FreeBSD.org> wrote:

> On Thu, Jul 26, 2012 at 07:17:48PM -0700, Robert wrote:
> > 
> > Greetings
> > 
> > I have been unable to build rxvt-unicode since updating perl to
> > 5.16. I thought I saw an email that someone else had this problem
> > but I cannot find it.
> 
> It happened to me on -current. There I worked around it by forcing
> clang as compiler for rxvt-unicode. This should do the trick:
> 
> cd /usr/ports/x11/rxvt-unicode && make clean && make CC=clang
> CXX=clang++ CPP=clang-cpp install
> 
> Not sure what the cause is.
> 
Thanks for this information. This worked as you said. 

If I put this clang information into /etc/make.conf will I need to
rebuild all of my installed ports?

Robert