Building and Installing gcc-4.7.0 on Ubuntu 12.04

[Anup Ghatage <ghatage@gmail.com>]

Hello,

I installed a mint Ubuntu 12.04, ran the updates and then downloaded
the tar for gcc-4.7.0.

Untar'ed it.
./configure
make -j4

then it showed this:
make[4]: Leaving directory `/home/UserPC/Downloads/gcc-4.
7.0/i686-pc-linux-gnu/libgcc'
In file included from /usr/include/stdio.h:28:0,
                 from ../.././libgcc/../gcc/tsystem.h:88,
                 from ../.././libgcc/libgcc2.c:29:
/usr/include/features.h:324:26: fatal error: bits/predefs.h: No such
file or directory
compilation terminated.
make[3]: *** [_negdi2.o] Error 1
In file included from /usr/include/stdio.h:28:0,
                 from ../.././libgcc/../gcc/tsystem.h:88,
                 from ../.././libgcc/libgcc2.c:29:
/usr/include/features.h:324:26: fatal error: bits/predefs.h: No such
file or directory
compilation terminated.
make[3]: *** [_lshrdi3.o] Error 1
make[3]: Leaving directory
`/home/UserPC/Downloads/gcc-4.7.0/i686-pc-linux-gnu/libgcc'
make[2]: *** [all-stage1-target-libgcc] Error 2
make[2]: Leaving directory `/home/UserPC/Downloads/gcc-4.7.0'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/UserPC/Downloads/gcc-4.7.0'
make: *** [all] Error 2
UserPC@UserPC-desktop:~/Downloads/gcc-4.7.0$

I did some background search, the predefs.h error seems to occur when
trying to install a 32 bit binary on a 64 bit Linux.
But My Linux is 32 bit, I double checked that with uname -m, it was i686.

Also something worth mentioning, when I installed GMP from source, its
configuration file showed a waring saying : gmp.h and libgmp are of
different versions 5.0.5 and 5.0.2 respectively.

Pretty clueless right now, would really appreciate it if anyone could
help. Also, apologies, if this is a repost.

Regards