* build-aux/download.scm (file-name->uri): Update URL to /20131110.
* gnu-system.am (nodist_bootstrap_x86_64_linux_DATA,
nodist_bootstrap_i686_linux_DATA): Change base name to
'guile-2.0.9.tar.xz'.
(gnu/packages/bootstrap/x86_64-linux/guile-2.0.9.tar.xz,
gnu/packages/bootstrap/i686-linux/guile-2.0.9.tar.xz): New targets.
(gnu/packages/bootstrap/x86_64-linux/guile-2.0.7.tar.xz,
gnu/packages/bootstrap/i686-linux/guile-2.0.7.tar.xz): Remove.
(gnu/packages/bootstrap/mips64el-linux/guile-2.0.9.tar.xz): Update
hash.
* gnu/packages/base.scm (gcc-boot0): Base upon GCC-4.8. Enable C++, and
add a few --disable flags. Remove MPFR workaround.
(cross-gcc-wrapper): Base upon GCC-4.8. Wrap both 'gcc' and 'g++'.
(libstdc++): New variable.
(gcc-final): Add it as an input; pass corresponding -I and -L flags.
* gnu/packages/bootstrap.scm (%bootstrap-guile): Always use
"guile-2.0.9.tar.xz.
(%bootstrap-coreutils&co): Update hashes.
(%bootstrap-binutils): Update URL and hashes.
(%bootstrap-glibc): Likewise.
(%bootstrap-gcc): Likewise.
* gnu/packages/gcc.scm (gcc-4.7): Add LDFLAGS.
Add --disable-libstdcxx-pch.
Modify the GNU_USER*_SPEC macros from gnu-user*.h instead of the raw
_SPEC macros.