[root@liuyanmin ~]# cd gmp-5.1.3 [root@liuyanmin gmp-5.1.3]# ./configure [root@liuyanmin gmp-5.1.3]# make [root@liuyanmin gmp-5.1.3]# make check
[root@liuyanmin gmp-5.1.3]# make install
[root@liuyanmin ~]# cd mpfr-3.1.2 [root@liuyanmin mpfr-3.1.2]# ./configure --with-gmp-include=/usr/local/include --with-gmp-lib=/usr/local/lib [root@liuyanmin mpfr-3.1.2]# make [root@liuyanmin mpfr-3.1.2]# make check
[root@liuyanmin gmp-5.1.3]# make install
[root@liuyanmin ~]# cd mpc-1.0.1 [root@liuyanmin mpc-1.0.1]# ./configure [root@liuyanmin mpc-1.0.1]# make [root@liuyanmin mpc-1.0.1]# make check [root@liuyanmin mpc-1.0.1]# make install
[root@liuyanmin mpc-1.0.1]# export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
[root@liuyanmin gcc4.8.2]# ./configure --prefix=/usr/gcc482 --enable-threads=posix --disable-checking --disable-multilib --enable-languages=c,c++ [root@liuyanmin gcc4.8.2]# make [root@liuyanmin gcc4.8.2]# make install
ls /usr/gcc482/bin | grep gcc
update-alternatives --install /usr/bin/gcc gcc /usr/gcc482/bin/i686-pc-Linux-gnu-gcc 40
[root@liuym usr]# mkdir /usr/gcc447backup/
[root@liuym usr]# mv /usr/bin/{gcc,g++} /usr/gcc447backup
[root@liuym usr]# ln -s /usr/gcc482/bin/gcc /usr/bin/gcc
[root@liuym usr]# ln -s /usr/gcc482/bin/g++ /usr/bin/g++
[root@liuym usr]# gcc -v
COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/gcc482/libexec/gcc/i686-pc-linux-gnu/4.8.2/lto-wrapper
:./configure --prefix=/usr/gcc482 --enable-threads=posix --disable-checking --disable-multilib --enable-languages=c,c++
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