GCC

Note:

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/.  See also
http://gcc.gnu.org/install/prerequisites.html for additional info.  If
you obtained GMP, MPFR and/or MPC from a vendor distribution package,
make sure that you have installed both the libraries and the header
files.  They may be located in separate packages.

GCC 4.8.4

$ tar xvfj gcc-4.8.4.tar.bz2 
$ cd gcc-4.8.4
$ tar xvfj ../gmp-4.3.2.tar.bz2
$ tar xvfj ../mpfr-2.4.2.tar.bz2
$ tar xvfz ../mpc-0.8.1.tar.gz
$ tar xvfj ../isl-0.14.tar.bz2
$ mv gmp-4.3.2 gmp
$ mv mpfr-2.4.2 mpfr
$ mv mpc-0.8.1 mpc
$ mv isl-0.14 isl
$ ./configure --prefix=/pfs/sw/gcc/4.8.4 --disable-multilib
$ make -j8
$ make install

GCC 4.9.2

$ tar xvfj gcc-4.9.2.tar.bz2
$ cd gcc-4.9.2
$ tar xvfj ../gmp-4.3.2.tar.bz2
$ tar xvfj ../mpfr-2.4.2.tar.bz2
$ tar xvfz ../mpc-0.8.1.tar.gz
$ tar xvfj ../isl-0.14.tar.bz2
$ mv gmp-4.3.2 gmp
$ mv mpfr-2.4.2 mpfr
$ mv mpc-0.8.1 mpc
$ mv isl-0.14 isl
$ ./configure --prefix=/pfs/sw/gcc/4.9.2 --disable-multilib
$ make -j8
$ make install