xmingw-binutils doesn't compile with gcc-4. Here is simple fix posted on LFS ftp-server.
Created attachment 72598 [details, diff] patch for xmingw-binutils to compile with gcc-4 Applies cleanly to latest (~arch) xmingw-binutils: [ebuild R ] dev-util/xmingw-binutils-2.15.94.20050118.1
Thanks, I checked it still works with gcc3. Added the patch to portage. ( no version bump needed as it does not change what is installed )