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安装依赖库

# Create the desired destination directory for GMP, MPFR, and MPC.
$ mkdir /home/case/local
# Download and un-tar the GMP source code. Change to GMP source directory and compile GMP.
$ cd ~/src/gmp-5.1.0
$ ./configure --prefix=/home/case/local
$ make -j 8
$ make -j 8 check
$ make install
# Download and un-tar the MPFR source code. Change to MPFR source directory and compile MPFR.
$ cd ~/src/mpfr-3.1.1
$ ./configure --prefix=/home/case/local --with-gmp=/home/case/local
$ make -j 8
$ make -j 8 check
$ make install
# Download and un-tar the MPC source code. Change to MPC source directory and compile MPC.
$ cd ~/src/mpc-1.0.1
$ ./configure --prefix=/home/case/local --with-gmp=/home/case/local --with-mpfr=/home/case/local
$ make -j 8
$ make -j 8 check
$ make install

上面装的3个库，GCC找不到，需要设置变量 LD_LIBRARY_PATH
   ~/.profile文件，在文件的最后加上一行：
   export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib （需先注销，永久有效）

编译 gcc

$ wget http://www.netgull.com/gcc/releases/gcc-4.8.1/gcc-4.8.1.tar.bz2
$ tar -xvjf gcc-4.8.1.tar.bz2
$ cd gcc-4.8.1
$ ./configure --prefix=/root/gcc481 --with-gmp=/root/gcc481 --with-mpfr=/root/gcc481 --enable-languages=c,c++,go
$ make

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