Compiling GNU 4.8.1 on CentOS 6

I encountered error when compiling GCC 4.8.1 on CentOS 6 I have the prequistics (via yum installed)

1. gmp 4.3.1-7.el6_2.2
2. mpfr 2.4.1-6.el6
3. mpc 0.19-1.el6.rf

But still I enountered the error

configure: error: Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+. 
Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify their locations.  
Source code for these libraries can be found at their respective hosting sites as well as 
at ftp://gcc.gnu.org/pub/gcc/infrastructure/

To resolve the issue, download from the ftp://gcc.gnu.org/pub/gcc/infrastructure/ the following application and compile them.

1. gmp-4.3.2.tar.bz2
2. mpfr-2.4.2.tar.bz2
3. mpc-0.8.1.tar.gz

1. Install gmp-4.3.2

# bunzip2 gmp-4.3.2.tar.bz2
# tar -zxvf gmp-4.3.2.tar
# cd gmp-4.3.2
# ./configure --prefix=/usr/local/gmp-4.3.2
# make
# make install

2. Install mpfr-2.4.2 (requires gmp-4.3.2 as prerequisites)

# bunzip2 mpfr-2.4.2.tar.bz2
# tar -zxvf mpfr-2.4.2.tar
# cd mpfr-2.4.2
# ./configure --prefix=/usr/local/mpfr-2.4.2 --with-gmp=/usr/local/gmp-4.3.2/
# make
# make install

3. Install mpc-0.8.1 (requires gmp-4.3.2 and mpfr-2.4.2 as prerequisites )

# tar -zxvf mpc-0.8.1.tar.gz
# cd mpc-0.8.1
#./configure --prefix=/usr/local/mpc-0.8.1/ --with-gmp=/usr/local/gmp-4.3.2/ --with-mpfr=/usr/local/mpfr-2.4.2
# make
# make install

4. Update your LD_LIBRARY_PATH reflect /usr/local/mpc-0.8.1/lib In your .bash_profile include the following

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpc-0.8.1

5. Install the glibc-devel.i686. For more information, do look at Error when compiling GCC 4.8.1 (linuxtoolkit.blogspot.com)

6. Finally install GNU CC 4.8.1

# tar -zxvf  gcc-4.8.1.tar.gz
# cd gcc-4.8.1
# mkdir build-gcc
# cd build-gcc
# ../configure --prefix=/usr/local/gcc-4.8.1 --with-mpfr=/usr/local/mpfr-2.4.2 --with-mpc=/usr/local/mpc-0.8.1 --with-gmp=/usr/local/gmp-4.3.2
# make
# make install