you've build and install binutils so you are currently in $LFS/sources/binutils-build you come out of that to $LFS/sources you remove binutils-1.2.3 and binutils-build you then untar gcc and cd into the created directory Then you follow the instructions on the page, this is where you are told to unpack gmp and mpfr after you unpacked them you should have $LFS/sources/gcc-1.2.3/mpfr and $LFS/sources/gcc-1.2.3/gmp