installing nspluginwrapper 2.

during make I run into the following problem:

agi@Alice:~/programok/nspluginwrapper-1.0.0$ make
gcc -std=c99 -m32 -o npviewer.bin npviewer-npw-viewer.o npviewer-npw-rpc.o npviewer-rpc.o npviewer-debug.o npviewer-utils.o npviewer-npruntime.o npviewer-cxxabi-compat.o -m32 -Llsb-build-i386 -lgtk-x11-2.0 -lgdk-x11-2.0 -lgobject-2.0 -ldl -lglib-2.0 -lX11 -lXt -ldl -lpthread -lgthread-2.0 -Wl,--export-dynamic -Wl,--version-script,/home/agi/programok/nspluginwrapper-1.0.0/src/npw-viewer.map -lsupc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.1.3/libsupc++.a when searching for -lsupc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.1.3/libsupc++.a when searching for -lsupc++
/usr/bin/ld: cannot find -lsupc++
collect2: ld returned 1 exit status
make: *** [npviewer.bin] Error 1

So, what to do?