AMD64 configure error

[James Lockie]

checking if start is defined by the compiler... no
checking if _start is defined by the compiler... no
configure: error: neither start nor _start is defined

# gcc -v
Using built-in specs.
Target: x86_64-pc-linux-gnu
Configured with: 
/var/tmp/portage/sys-devel/gcc-4.1.1-r3/work/gcc-4.1.1/configure 
--prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.1.1 
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.1/include 
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.1 
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.1/man 
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.1/info 
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.1/include/g++-v4 
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec 
--enable-nls --without-included-gettext --with-system-zlib 
--disable-checking --disable-werror --disable-libunwind-exceptions 
--disable-multilib --disable-libmudflap --disable-libssp 
--disable-libgcj --enable-languages=c,c++,fortran --enable-shared 
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 4.1.1 (Gentoo 4.1.1-r3)