www/neon sees ghost version of GCC

[Michael Gardner]

I was trying to install www/neon, and the configuration failed with:

configure: error: C++ preprocessor "/lib/cpp" fails sanity check

The first strange thing about that is that there is no such file
(/lib/cpp) on my system. The second strange thing is that in
/usr/ports/www/neon/work/neon-0.25.5/config.log, I found this:

configure:4106: c++ --version </dev/null >&5
c++ (GCC) 3.2.3

I should only have GCC 3.4.4 and 4.1.2 installed, and indeed running
"c++ --version" tells me I have version 3.4.4, not 3.2.3. I'm running
FreeBSD 6.1, upgraded from 5.4 through 6.0. As far as I know, no other
ports have displayed this behavior on my machine. Where could
configure be getting the idea that I have GCC 3.2.3?

My apologies if this was the wrong list for the question, by the way.

Michael