Due to the changes in g++ 2.5.x. The OI 4.0 compiled with g++ 2.4.x is not compatible with g++ 2.5.x or above. Here I included a few fixes. I only tested with OI/demos/simple/hello_world.C. You need to do cd /tmp gzip -dc OI-4.0-gcc-2.5.patches.tar.gz | tar xof - ar ucv /usr/lib/libOI.a __old_static.o ar -d /usr/lib/libOI.a __.SYMDEF ranlib /usr/lib/libOI.a ar ucv /usr/lib/libOI.sa __old_static.o __old_shared.o ar -d /usr/lib/libOI.sa __.SYMDEF ranlib /usr/lib/libOI.sa cd /usr/include patch -p0 < /tmp/OI-4.0.diff H.J. hjl@nynexst.com 02/12/94