最近想升级mesos0.23.0,结果编译mesos0.23.0需要gcc4.8+，可是centOS6.6最高版本的gcc也只到4.4.7版本,只好手动升级一下了。

下载4.8.2源码

wget ftp://gcc.gnu.org/pub/gcc/releases/gcc-4.8.2/gcc-4.8.2.tar.bz2  

下载依赖(gmp-4.3.2、mpfr-2.4.2、mpc-0.8.1)

/usr/install/gcc-4.8.2/contrib/download_prerequisities

依次编译安装依赖

cd /usr/install/gcc-4.8.2/contrib/gmp

mkdir build

cd build

../configure --prefix=/usr/local/gcc/gmp-4.3.2

sudo make

sudo make install

cd /usr/install/gcc-4.8.2/contrib/mpfr

mkdir build

cd build

../configure --prefix=/usr/local/gcc/mpfr-2.4.2 --with-gmp=/usr/local/gcc/gmp-4.3.2

sudo make

sudo make install

cd /usr/install/gcc-4.8.2/contrib/mpc

mkdir build

cd build

../configure --prefix=/usr/local/gcc/mpc-0.8.1 --with-mpfr=/usr/local/gcc/mpfr-2.4.2 --with-gmp=/usr/local/gcc/gmp-4.3.2

sudo make

sudo make install

编译安装gcc4.8.2

cd /usr/install/gcc-4.8.2

mkdir build

../configure --prefix=/usr/local/gcc --enable-threads=posix --disable-checking --enable-languages=c,c++ --disable-multilib --with-gmp=/usr/local/gcc/gmp-4.3.2 --with-mpfr=/usr/local/gcc/mpfr-2.4.2 --with-mpc=/usr/local/gcc/mpc-0.8.1

sudo make

sudo make install

卸载旧版本

yum remove -y gcc gcc-c++

updatedb

链接新版本

cd /usr/bin

ln -s /usr/local/gcc/bin/gcc gcc

ln -s /usr/local/gcc/bin/g++ g++  

检查版本

gcc -v

done