[Centos]升级安装GCC

摘要

升级

wget http://gcc.parentingamerica.com/releases/gcc-6.2.0/gcc-6.2.0.tar.bz2[/code] 
[root@localhost gcc-6.2.0]# ./contrib/download_prerequisites
--2016-11-23 19:35:16--  ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-2.4.2.tar.bz2 => “mpfr-2.4.2.tar.bz2”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) /pub/gcc/infrastructure ... done.
==> SIZE mpfr-2.4.2.tar.bz2 ... 1077886
==> PASV ... done.    ==> RETR mpfr-2.4.2.tar.bz2 ... done.
Length: 1077886 (1.0M) (unauthoritative)

100%[==========================================================>] 1,077,886   62.6K/s   in 24s

2016-11-23 19:35:48 (44.3 KB/s) - “mpfr-2.4.2.tar.bz2” saved [1077886]

--2016-11-23 19:35:49--  ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-4.3.2.tar.bz2 => “gmp-4.3.2.tar.bz2”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) /pub/gcc/infrastructure ... done.
==> SIZE gmp-4.3.2.tar.bz2 ... 1897483
==> PASV ... done.    ==> RETR gmp-4.3.2.tar.bz2 ... done.
Length: 1897483 (1.8M) (unauthoritative)

100%[==========================================================>] 1,897,483   21.5K/s   in 92s

2016-11-23 19:37:28 (20.2 KB/s) - “gmp-4.3.2.tar.bz2” saved [1897483]

--2016-11-23 19:37:29--  ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-0.8.1.tar.gz => “mpc-0.8.1.tar.gz”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) /pub/gcc/infrastructure ... done.
==> SIZE mpc-0.8.1.tar.gz ... 544950
==> PASV ... done.    ==> RETR mpc-0.8.1.tar.gz ... done.
Length: 544950 (532K) (unauthoritative)

100%[==========================================================>] 544,950     24.5K/s   in 19s

2016-11-23 19:37:55 (27.7 KB/s) - “mpc-0.8.1.tar.gz” saved [544950]

--2016-11-23 19:37:55--  ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.15.tar.bz2 => “isl-0.15.tar.bz2”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) /pub/gcc/infrastructure ... done.
==> SIZE isl-0.15.tar.bz2 ... 1574964
==> PASV ... done.    ==> RETR isl-0.15.tar.bz2 ... done.
Length: 1574964 (1.5M) (unauthoritative)

100%[==========================================================>] 1,574,964   44.3K/s   in 30s

2016-11-23 19:38:30 (51.4 KB/s) - “isl-0.15.tar.bz2” saved [1574964]

[root@localhost gcc-6.2.0]#


下载安装过程
配置gcc

建立一个输出目录，编译时所有生成的中间文件都放到该目录下：

mkdir gcc-temp


工作目录切换至输出目录，并在其中执行配置和安装：

cd gcc-temp


执行
configure
配置安装文件：

../configure --enable-checking=release --enable-languages=c,c++ --disable-multilib


配置完成后，执行以下命令，编译
gcc
：

make


编译过程较长，耐心等待。编译完成后，安装
gcc
：

make install


安装完成后还需要替换系统默认的
gcc
，执行以下命令，查找
6.2
版本的安装文件：

ls /usr/local/bin | grep gcc




执行升级命令：

/usr/sbin/update-alternatives --install  /usr/bin/gcc gcc /usr/local/bin/x86_64-pc-linux-gnu-gcc-6.2.0 52


验证安装

查看版本号

gcc -v




到此说明安装成功了。

参考文章

http://itbilu.com/linux/management/V1vdnt9ll.html