tar -xjf gcc-4.7.2.tar.bz2
cd gcc-4.7.2
sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in
sed -i 's/BUILD_INFO=info/BUILD_INFO=/' gcc/configure
case `uname -m` in
  i?86) sed -i 's/^T_CFLAGS =$/& -fomit-frame-pointer/' gcc/Makefile.in ;;
esac
sed -i -e /autogen/d -e /check.sh/d fixincludes/Makefile.in
mkdir -v ../gcc-build
cd ../gcc-build
../gcc-4.7.2/configure --prefix=/usr            \
                       --libexecdir=/usr/lib    \
                       --enable-shared          \
                       --enable-threads=posix   \
                       --enable-__cxa_atexit    \
                       --enable-clocale=gnu     \
                       --enable-languages=c,c++ \
                       --disable-multilib       \
                       --disable-bootstrap      \
                       --with-system-zlib
make
ulimit -s 32768
make -k check
../gcc-4.7.2/contrib/test_summary
make install
ln -sv ../usr/bin/cpp /lib
ln -sv gcc /usr/bin/cc

# Test Phase
#
echo 'main(){}' > dummy.c
cc dummy.c -v -Wl,--verbose &> dummy.log
readelf -l a.out | grep ': /lib' # [Requesting program interpreter: /lib/ld-linux.so.2]

grep -o '/usr/lib.*/crt[1in].*succeeded' dummy.log
grep -B4 '^ /usr/include' dummy.log
grep 'SEARCH.*/usr/lib' dummy.log |sed 's|; |\n|g'
grep "/lib.*/libc.so.6 " dummy.log
grep found dummy.log
rm -v dummy.c a.out dummy.log

mkdir -pv /usr/share/gdb/auto-load/usr/lib
mv -v /usr/lib/*gdb.py /usr/share/gdb/auto-load/usr/lib

cd ..
rm -fr gcc-4.7.2