【亲测】<g++/gcc>CentOS下g++: command not found问题的解决(c++环境安装)

1. 问题的提出

   在安装extundelete的过程中，发现在configure过程中，出错了，具体的错误信息如下：

1.  
   configure:2865: g++ --version >&5
2.  
   ./configure: line 2867: g++: command not found
3.  
   configure:2876: $? = 127
4.  
   configure:2865: g++ -v >&5
5.  
   ./configure: line 2867: g++: command not found
6.  
   configure:2876: $? = 127
7.  
   configure:2865: g++ -V >&5
8.  
   ./configure: line 2867: g++: command not found
9.  
   configure:2876: $? = 127
10.  
    configure:2865: g++ -qversion >&5
11.  
    ./configure: line 2867: g++: command not found
12.  
    configure:2876: $? = 127
13.  
    configure:2896: checking whether the C++ compiler works
14.  
    configure:2918: g++ conftest.cpp >&5
15.  
    ./configure: line 2920: g++: command not found
16.  
    configure:2922: $? = 127
17.  
    configure:2960: result: no
18.  
    configure: failed program was:
19.  
    | /* confdefs.h */
20.  
    | #define PACKAGE_NAME "extundelete"
21.  
    | #define PACKAGE_TARNAME "extundelete"
22.  
    | #define PACKAGE_VERSION "0.2.4"
23.  
    | #define PACKAGE_STRING "extundelete 0.2.4"
24.  
    | #define PACKAGE_BUGREPORT "extundelete.sourceforge.net"
25.  
    | #define PACKAGE_URL ""
26.  
    | #define PACKAGE "extundelete"
27.  
    | #define VERSION "0.2.4"
28.  
    | /* end confdefs.h. */
29.  
    |
30.  
    | int
31.  
    | main ()
32.  
    | {
33.  
    |
34.  
    | ;
35.  
    | return 0;
36.  
    | }
37.  
    configure:2965: error: in `/root/extundelete-0.2.4‘:
38.  
    configure:2967: error: C++ compiler cannot create executables
39.  
    See `config.log‘ for more details

经过分析，发现其中的关键错误信息是：

 g++: command not found

2.  安装以及解决

  由于本人使用的OS环境为centos， 其默认的包管理工具为yum, 故按照依赖包：

1.  
   yum -y update gcc
2.  
   yum -y install gcc+ gcc-c++

3. 总结分析

  默认情况下，centos并未按照gcc相关的编译命令，如果在安装软件之时，有时候需要从源代码编译开始，进行安装；此时就需要gcc的命令支持。