tar xjf gcc-4.7.2.tar.bz2 
cd gcc-4.7.2
tar -Jxf ../mpfr-3.1.1.tar.xz
tar -Jxf ../gmp-5.1.1.tar.xz   
tar -zxf ../mpc-1.0.1.tar.gz
mv -v mpfr-3.1.1 mpfr
mv -v gmp-5.1.1 gmp
mv -v mpc-1.0.1 mpc

for file in \
 $(find gcc/config -name linux64.h -o -name linux.h -o -name sysv4.h)
do
  cp -uv $file{,.orig}
  sed -e 's@/lib\(64\)\?\(32\)\?/ld@/tools&@g' \
      -e 's@/usr@/tools@g' $file.orig > $file
  echo '
#undef STANDARD_STARTFILE_PREFIX_1
#undef STANDARD_STARTFILE_PREFIX_2
#define STANDARD_STARTFILE_PREFIX_1 "/tools/lib/"
#define STANDARD_STARTFILE_PREFIX_2 ""' >> $file
  touch $file.orig
done

sed -i '/k prot/agcc_cv_libc_provides_ssp=yes' gcc/configure
sed -i 's/BUILD_INFO=info/BUILD_INFO=/' gcc/configure

mkdir -v ../gcc-build
cd ../gcc-build

../gcc-4.7.2/configure         \
    --target=$LFS_TGT          \
    --prefix=/tools            \
    --with-sysroot=$LFS        \
    --with-newlib              \
    --without-headers          \
    --with-local-prefix=/tools \
    --with-native-system-header-dir=/tools/include \
    --disable-nls              \
    --disable-shared           \
    --disable-multilib         \
    --disable-decimal-float    \
    --disable-threads          \
    --disable-libmudflap       \
    --disable-libssp           \
    --disable-libgomp          \
    --disable-libquadmath      \
    --enable-languages=c       \
    --with-mpfr-include=$(pwd)/../gcc-4.7.2/mpfr/src \
    --with-mpfr-lib=$(pwd)/mpfr/src/.libs
make
make install
pushd $(dirname $(find $LFS/tools -type f -name 'libgcc.a'))
ln -sv libgcc.a `$LFS_TGT-gcc -print-libgcc-file-name | sed 's/libgcc/&_eh/'`
popd
cd ..
rm -fr gcc-4.7.2 gcc-build