安装 gcc-c++ 时报错和原有 gcc 版本冲突

Centos 6.7 安装 gcc-c++时报下面的错误：

Resolving Dependencies
--> Running transaction check
---> Package gcc-c++.i686 :4.4.-.el6 will be installed
--> Processing Dependency: libstdc++-devel = 4.4.-.el6 for package: gcc-c++-4.4.-.el6.i686
--> Processing Dependency: gcc = 4.4.-.el6 for package: gcc-c++-4.4.-.el6.i686
--> Running transaction check
---> Package gcc-c++.i686 :4.4.-.el6 will be installed
--> Processing Dependency: gcc = 4.4.-.el6 for package: gcc-c++-4.4.-.el6.i686
---> Package libstdc++-devel.i686 :4.4.-.el6 will be installed
--> Finished Dependency Resolution
Error: Package: gcc-c++-4.4.-.el6.i686 (c6-media)
           Requires: gcc = 4.4.-.el6
           Installed: gcc-4.4.-.el6.i686 (@base)
               gcc = 4.4.-.el6
               gcc = 4.4.-.el6
           Available: gcc-4.4.-.el6.i686 (c6-media)
               gcc = 4.4.-.el6
               gcc = 4.4.-.el6
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

解决办法：将 gcc，cpp, libgomp 等等依赖先删除掉，然后重新直接安装 gcc-c++,让其自动安装它的正确版本的依赖的 gcc, cpp, libgomp:

[root@localhost ~]# yum install gcc-c++
Loaded plugins: fastestmirror, refresh-packagekit, security
Setting up Install Process
Loading mirror speeds from cached hostfile
 * c6-media:
Resolving Dependencies
--> Running transaction check
---> Package gcc-c++.i686 :4.4.-.el6 will be installed
--> Processing Dependency: libstdc++-devel = 4.4.-.el6 for package: gcc-c++-4.4.-.el6.i686
--> Processing Dependency: gcc = 4.4.-.el6 for package: gcc-c++-4.4.-.el6.i686
--> Running transaction check
---> Package gcc.i686 :4.4.-.el6 will be installed
--> Processing Dependency: libgomp = 4.4.-.el6 for package: gcc-4.4.-.el6.i686
--> Processing Dependency: cpp = 4.4.-.el6 for package: gcc-4.4.-.el6.i686
--> Processing Dependency: libgomp.so. for package: gcc-4.4.-.el6.i686
---> Package libstdc++-devel.i686 :4.4.-.el6 will be installed
--> Running transaction check
---> Package cpp.i686 :4.4.-.el6 will be installed
---> Package libgomp.i686 :4.4.-.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==========================================================================================================================================
 Package                               Arch                       Version                            Repository                      Size
==========================================================================================================================================
Installing:
 gcc-c++                               i686                       4.4.-.el6                       c6-media                       4.3 M
Installing for dependencies:
 cpp                                   i686                       4.4.-.el6                       c6-media                       3.4 M
 gcc                                   i686                       4.4.-.el6                       c6-media                       8.2 M
 libgomp                               i686                       4.4.-.el6                       c6-media                        k
 libstdc++-devel                       i686                       4.4.-.el6                       c6-media                       1.6 M

Transaction Summary
==========================================================================================================================================
Install        Package(s)

Total download size:  M
Installed size:  M
Is this ok [y/N]: y
Downloading Packages:
------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                       MB/s |   MB     :
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : libstdc++-devel-4.4.-.el6.i686                                                                                      /
  Installing : cpp-4.4.-.el6.i686                                                                                                  /
  Installing : libgomp-4.4.-.el6.i686                                                                                              /
  Installing : gcc-4.4.-.el6.i686                                                                                                  /
  Installing : gcc-c++-4.4.-.el6.i686                                                                                              /
Unable to connect to dbus
  Verifying  : gcc-c++-4.4.-.el6.i686                                                                                              /
  Verifying  : libgomp-4.4.-.el6.i686                                                                                              /
  Verifying  : gcc-4.4.-.el6.i686                                                                                                  /
  Verifying  : libstdc++-devel-4.4.-.el6.i686                                                                                      /
  Verifying  : cpp-4.4.-.el6.i686                                                                                                  /

Installed:
  gcc-c++.i686 :4.4.-.el6

Dependency Installed:
  cpp.i686 :4.4.-.el6       gcc.i686 :4.4.-.el6       libgomp.i686 :4.4.-.el6       libstdc++-devel.i686 :4.4.-.el6

Complete!
[root@localhost ~]#

可以看到安装 gcc-c++ 成功了。