注：在RedHat Enterprise Linux 5使用gcc编译第一个程序时，发现其gcc并未安装。在网上搜索看到这篇帖子。遂转到此处进行学习。感谢博客园中的“风尘孤客”的分享。@风尘孤客
Abstraction
Red Hat Enterprise 5默认是不安装gcc的，需要自己手动安装。gcc所需要的包都可以在安装光盘上找到，至于最新的gcc可以在 http://gcc.gnu.org/ 下载，但是是以源码的形式压缩的，需要对其进行编译。Solution
1、插入安装盘,首先在/mnt下创建cdrom文件夹，然后挂载安装盘：mount /dev/cdrom /mnt/cdrom；2、进入/mnt/cdrom/Server，按顺序安装以下包：
（1）安装kernel-headers-2.6.18-128.el5.i386.rpm
[root@localhost Server]# rpm -ivh ./kernel-headers-2.6.18-128.el5.i386.rpm
warning: ./kernel-headers-2.6.18-128.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:kernel-headers ########################################### [100%]
（2）安装glibc-headers-2.5-34.i386.rpm
[root@localhost Server]# rpm -ivh ./glibc-headers-2.5-34.i386.rpm
warning: ./glibc-headers-2.5-34.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:glibc-headers ########################################### [100%]
（3）安装glibc-devel-2.5-34.i386.rpm
[root@localhost Server]# rpm -ivh ./glibc-devel-2.5-34.i386.rpm
warning: ./glibc-devel-2.5-34.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:glibc-devel ########################################### [100%]
（4）安装libgomp-4.3.2-7.el5.i386.rpm
[root@localhost Server]# rpm -ivh ./libgomp-4.3.2-7.el5.i386.rpm
warning: ./libgomp-4.3.2-7.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:libgomp ########################################### [100%]
（5）安装rpm -ivh gcc-4.1.2-44.el5.i386.rpm
[root@localhost Server]# rpm -ivh gcc-4.1.2-44.el5.i386.rpm
warning: gcc-4.1.2-44.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:gcc ########################################### [100%]
（6）安装libstdc++-devel-4.1.2-44.el5.i386.rpm
[root@localhost Server]# rpm -ivh ./libstdc++-devel-4.1.2-44.el5.i386.rpm
warning: ./libstdc++-devel-4.1.2-44.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:libstdc++-devel ########################################### [100%]
（7）安装gcc-c++-4.1.2-44.el5.i386.rpm
[root@localhost Server]# rpm -ivh ./gcc-c++-4.1.2-44.el5.i386.rpm
warning: ./gcc-c++-4.1.2-44.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:gcc-c++ ########################################### [100%]
此过程中有可能需要安装其他的安装包， 如下：
[root@localhost Server]# rpm -ivh gcc-4.1.2-14.el5.i386.rpm
warning: gcc-4.1.2-14.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
error: Failed dependencies:
glibc-devel >= 2.2.90-12 is needed by gcc-4.1.2-14.el5.i386
找到相应的安装包安装即可
[root@localhost Server]# rpm -ivh gcc-4.1.2-14.el5.i386.rpm
warning: gcc-4.1.2-14.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
error: Failed dependencies:
glibc-devel >= 2.2.90-12 is needed by gcc-4.1.2-14.el5.i386
[root@localhost Server]# rpm -ivh glibc-devel-2.5-18.i386.rpm
warning: glibc-devel-2.5-18.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing... ########################################### [100%]
1:glibc-devel ########################################### [100%]
3、最后进入/mnt，输入rpm –qa gcc* ，如果成功安装了gcc，可以查出以下内容：
binutils-2.13.90.0.18-9.i386.rpm
cpp-3.2.2-5.i386.rpm