gcc 2.95.3 building problem x86_64

[cihan]

I have intel core2 duo 64 bit processor and I try to build gcc 2.95.3 on 
ubuntu 8.04 but the gcc cant build

 ./configure --target=x86_64-linux-gnu --host=x86_64-linux-gnu 
--build=x86_64-linux-gnu --prefix=/usr/local
Invalid configuration `x86_64-linux-gnu': machine `x86_64' not recognized
Unrecognized build system name x86_64-linux-gnu.


and

# gcc -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v 
--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr 
--enable-shared --with-system-zlib --libexecdir=/usr/lib 
--without-included-gettext --enable-threads=posix --enable-nls 
--with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2 
--enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc 
--enable-mpfr --enable-checking=release --build=x86_64-linux-gnu 
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)