The C compiler cannot create executables when trying to build Binutils

I am trying to build Linux From Scratch and now I am in chapter 5.4 which explains how to build Binutils. I have binutils 2.20 source code, but when I try to build it:

time { ./binutils-2.20/configure --target=$LFS_TGT --prefix=/tools --disable-nls --disable-werror ; }

      

        
        
        
      

    

this gives me an error:

checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-lfs-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether ln works... yes
checking whether ln -s works... yes
checking for a sed that does not truncate output... /bin/sed
checking for gawk... gawk
checking for gcc... GCC
checking for C compiler default output file name... 
configure: error: in `/media/LFS':
configure: error: C compiler cannot create executables
See `config.log' for more details.

      

        
        
        
      

    

You can see my config.log at pastebin.com page: http://pastebin.com/hX7v5KLn

I just installed Ubuntu 10.04 and reinstalled GCC and installed g ++. In addition, the build is done by a non-root non-administrator user called "lfs" (also described in Linux From Scratch) and in a different section than where the system is installed.

Can anyone help me? Thanks to