CentOS下g++: command not found问题的解决

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：

configure:2865: g++ --version >&5
./configure: line 2867: g++: command not found
configure:2876: $? = 127
configure:2865: g++ -v >&5
./configure: line 2867: g++: command not found
configure:2876: $? = 127
configure:2865: g++ -V >&5
./configure: line 2867: g++: command not found
configure:2876: $? = 127
configure:2865: g++ -qversion >&5
./configure: line 2867: g++: command not found
configure:2876: $? = 127
configure:2896: checking whether the C++ compiler works
configure:2918: g++    conftest.cpp  >&5
./configure: line 2920: g++: command not found
configure:2922: $? = 127
configure:2960: result: no
configure: Failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "extundelete"
| #define PACKAGE_TARNAME "extundelete"
| #define PACKAGE_VERSION "0.2.4"
| #define PACKAGE_STRING "extundelete 0.2.4"
| #define PACKAGE_BUGREPORT "extundelete.sourceforge.net"
| #define PACKAGE_URL ""
| #define PACKAGE "extundelete"
| #define VERSION "0.2.4"
| /* end confdefs.h.  */
|
| int
| main ()
| {
|
|   ;
|   return 0;
| }
configure:2965: error: in `/root/extundelete-0.2.4':
configure:2967: error: C++ compiler cannot create executables
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

g++马上就脑补为gc++的编译器是不是没有安装呀？ 估计是的，按图索骥，安装看看。

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：

yum -y update gcc
yum -y install gcc+ gcc-c++

执行上述命令之后，可以返现gcc相关命令都按照成功了，故问题解决。

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。