Can't build lib due to exception model?

[Jerry Quinn]

After updating in preparation to merge in my documentation patch, I can no
longer build the library.  During the library configure, I'm getting the
following: 

checking whether a program can dlopen itself... (cached) yes
checking whether a statically linked program can dlopen itself... (cached) no
appending configuration tag "CXX" to libtool
checking for GNU make... (cached) make
checking for exception model to use... configure: error: unable to detect exception model
make[1]: *** [configure-target-libstdc++-v3] Error 1
make[1]: Leaving directory `/home/jlquinn/gcc/build'
make: *** [bootstrap] Error 2
jlquinn@tiamat:~/gcc/build$


Any clues?

Thanks,
Jerry