X Chen笔记---Centos通过yum的方式升级gcc/g++_导入devtoolset-9的yum秘钥-优快云博客

本文提供了一种逐步升级 GCC 和 G++ 的方法，适用于 CentOS 系统，从系统自带版本依次升级到 4.8、4.9 和 5.2 版本。文中详细记录了每一步的安装命令及版本确认步骤。

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原文链接：https://www.dwhd.org/20160724_085212.html

通过此方式升级gcc/g++，最好能从底到高一步步升级，即：Centos自带-4.8-4.9-5.2，升级过程如下:

gcc 4.8 安装

[root@DS-VM-Node239 ~]# curl -Lks http://www.hop5.in/yum/el6/hop5.repo > /etc/yum.repos.d/hop5.repo
[root@DS-VM-Node239 ~]# yum install gcc gcc-g++ -y
[root@DS-VM-Node239 ~]# gcc --version
gcc (GCC) 4.8.2 20131212 (Red Hat 4.8.2-8)
Copyright © 2013 Free Software Foundation, Inc.
本程序是自由软件；请参看源代码的版权声明。本软件没有任何担保；
包括没有适销性和某一专用目的下的适用性担保。
[root@DS-VM-Node239 ~]# g++ --version
g++ (GCC) 4.8.2 20131212 (Red Hat 4.8.2-8)
Copyright © 2013 Free Software Foundation, Inc.
本程序是自由软件；请参看源代码的版权声明。本软件没有任何担保；
包括没有适销性和某一专用目的下的适用性担保。
[root@DS-VM-Node211 ~]#

gcc 4.9 安装

[root@DS-VM-Node239 ~]# yum install centos-release-scl -y
[root@DS-VM-Node239 ~]# yum install devtoolset-3-toolchain -y
[root@DS-VM-Node239 ~]# scl enable devtoolset-3 bash
[root@DS-VM-Node239 ~]# gcc --version
gcc (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6)
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
[root@DS-VM-Node239 ~]# g++ --version
g++ (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6)
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
[root@DS-VM-Node239 ~]# gfortran --version
GNU Fortran (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6)
Copyright (C) 2014 Free Software Foundation, Inc.
 
GNU Fortran comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of GNU Fortran
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING
 
[root@DS-VM-Node239 ~]#

gcc 5.2 安装

[root@DS-VM-Node239 ~]# yum install centos-release-scl -y
[root@DS-VM-Node239 ~]# yum install devtoolset-4-toolchain -y
[root@DS-VM-Node239 ~]# scl enable devtoolset-4 bash
[root@DS-VM-Node239 ~]# gcc --version
gcc (GCC) 5.2.1 20150902 (Red Hat 5.2.1-2)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
[root@DS-VM-Node239 ~]# g++ --version
g++ (GCC) 5.2.1 20150902 (Red Hat 5.2.1-2)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
[root@DS-VM-Node239 ~]#