C++ preprocessor fails sanity check

Hello.

I am trying to install software (tetex) using Fink on a G4 PowerBook (1 GHz). I get an error message when it checks the C++ preprocessor (see below). I had this exact error when I attempted to install on my G3, and I got around it by reinstalling the Developer Tools (or anyway, that's what I did between it not working and working). But that hasn't worked this time.

Thanks for any help

-Hans

Error message:

checking how to run the C++ preprocessor... /lib/cpp
configure: error: C++ preprocessor "/lib/cpp" fails sanity check
### execution of /var/tmp/tmp.2.CDsLG6 failed, exit code 1
Failed: compiling ncurses-5.3-20031018-2 failed

Question: Do you have more than one version of gcc installed on your machine? Run the following commands and tell us what it says.

sudo /usr/libexec/locate.updatedb
locate gcc | grep bin/

The first line might be optional, but I didn't want to make any assumptions about how up to date your locatedb was. However, if you know that your locatedb is regularly updated, just run the second line.