when we try to install g++ in simulator, it meet an error.

the original configure is as follows:
./gcc-3.1/configure --target=or32-uclinux --prefix=/opt/or32-uclinux \
--local-prefix=/opt/or32-uclinux/or32-uclinux --with-gnu-as \
--with-gnu-ld --verbose --enable-languages=c

And we change another configuration:
./gcc-3.1/configure --target=or32-uclinux --prefix=/opt/or32-uclinux \
--local-prefix=/opt/or32-uclinux/or32-uclinux --with-gnu-as \
--with-gnu-ld --verbose --enable-languages=c,c++

the error message is as follows:
make[1]: Leaving directory `/root/or1k/b-gcc/gcc'
Configuring in or32-uclinux/libstdc++-v3
configure: error: --local-prefix=/opt/or32-uclinux/or32-uclinux: invalid
option; use --help to show usage
make: *** [configure-target-libstdc++-v3] Error 1