linux下安装gcc所需的包及安装步骤：
gmp
configure --prefix=/usr/local/gmp-6.0.0 --enable-cxx
------------------------------------------------------------------------
mpfr
configure --prefix=/usr/local/mpfr-3.1.2 --with-gmp=/usr/local/gmp-6.0.0
------------------------------------------------------------------------
mpc
configure --prefix=/usr/local/mpc-1.0 --with-gmp=/usr/local/gmp-6.0.0
--with-mpfr=/usr/local/mpfr-3.1.2
------------------------------------------------------------------------
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpc-1.0/lib:/usr/local/gmp-6.0.0/lib:/usr/local/mpfr-3.1.2/lib
------------------------------------------------------------------------
gcc
./configure --prefix=/usr/local/gcc-4.8.2 --enable-threads=posix --disable-checking
--disable-multilib --enable-languages=c,c++ --with-gmp=/usr/local/gmp-6.0.0
--with-mpfr=/usr/local/mpfr-3.1.2 --with-mpc=/usr/local/mpc-1.0
------------------------------------------------------------------------