GCC安装

Tools Linux

apt-get安装

$ sudo apt-get install gcc
	$ sudo apt-get install g++

yum安装

源码安装（推荐）

1. 下载

ftp://gcc.gnu.org/pub/gcc/releases/

下载相应的版本

相关依赖包下载：

• GMP 计算库

ftp://gcc.gnu.org/pub/gcc/infrastructure/

• MPFR 编译工具

ftp://gcc.gnu.org/pub/gcc/infrastructure/

• MPC

ftp://gcc.gnu.org/pub/gcc/infrastructure/

2. 安装依赖包

• Install gmp4.3.2

  tar jxvf gmp-4.3.2.tar.bz2
  mkdir /usr/local/gmp-4.3.2
  cd gmp-4.3.2
  mkdir build
  cd build
  ../configure --prefix=/usr/local/gmp-4.3.2
  make && make install
  

• Install mpfr2.4.2

  tar jxvf mpfr-2.4.2.tar.bz2
  mkdir /usr/local/mpfr-2.4.2
  cd mpfr-2.4.2
  mkdir build
  cd build
  ../configure --prefix=/usr/local/mpfr-2.4.2 --with-gmp=/usr/local/gmp-4.3.2
  make 
  make check
  make install
  

• Install mpc-0.8.1

  tar zxvf mpc-0.8.1.tar.gz
  mkdir /usr/local/mpc-0.8.1
  cd mpc-0.8.1
  mkdir build
  cd build
  ../configure --prefix=/usr/local/mpc-0.8.1 --with-gmp=/usr/local/gmp-4.3.2 --with-mpfr=/usr/local/mpfr-2.4.2
  make && make install
  

• Configure

  cd $HOME
  		ls -a
  		sudo vi .bash_profile
  		LD_LIBRARY_PATH=:/usr/local/mpc-0.8.1/lib:/usr/local/gmp-4.3.2/lib:/usr/local/mpfr-2.4.2/lib:$LD_LIBRARY_PATH
  
  export LD_LIBRARY_PATH
  
  source .bash_profile
  

查看环境变量是否设置成功：

    $ echo $LD_LIBRARY_PATH

3. 安装GCC

tar zxvf gcc-6.1.0.tar.gz
mkdir /usr/local/gcc-6.1.0
cd gcc-6.1.0
mkdir build
cd build
../configure --prefix=/usr/local/gcc-6.1.0 -enable-threads=posix -disable-checking -disable-multilib -enable-languages=c,c++ --with-gmp=/usr/local/gmp-4.3.2 --with-mpfr=/usr/local/mpfr-2.4.2 --with-mpc=/usr/local/mpc-0.8.1
make
make install

4. 配置环境变量

cd $HOME
ls -a
sudo vi .bashrc

添加

# GCC 
GCCHOME=/usr/local/gcc-6.1.0
PATH=$GCCHOME/bin:$PATH
LD_LIBRARY_PATH=$GCCHOME/lib：$LD_LIBRARY_PATH
export GCCHOME PATH LD_LIBRARY_PATH

判读是否成功

$ which gcc
	$ gcc –v
$ cat /proc/version

修改系统默认GCC(不建议使用)

$ rm /usr/bin/gcc
	$ ln -s /usr/bin/gcc-6.1.0 /usr/bin/gcc