在全新的linux系统中，有时系统包中没有默认的gcc，所以需要全新安装gcc。然而下载的gcc原码包，在安装的时候需要先有c compiler软件。下面是网上搜的可行解决办法:
下载安装原CentOS5-Base-163.repo
<pre>[root@localhost~]# wget http://mirrors.163.com/.help/CentOS5-Base-163.repo
--2015-10-09 14:33:10-- http://mirrors.163.com/.help/CentOS5-Base-163.repo
Resolving mirrors.163.com... 123.58.173.186,123.58.173.185
Connecting to mirrors.163.com|123.58.173.186|:80...connected.
HTTP request sent, awaiting response... 200 OK
Length: 2341 (2.3K) [application/octet-stream]
Saving to:CentOS5-Base-163.repo' 100%2,341 --.-K/s in 0s 2015-10-09 14:33:22 (108 MB/s) -CentOS5-Base-163.repo' saved [2341/2341]
</pre>修改repo文件(根据红帽版本)
<pre>[root@localhost~]# mv CentOS5-Base-163.repo /etc/yum.repos.d/</pre>*** 把$releasever替换成5 （红帽6版本以上的改为6）
<pre>[root@localhost yum.repos.d]# sed -i 's#$releasever#5#g' ./CentOS5-Base-163.repo</pre>清除原有缓存
<pre>[root@localhost yum.repos.d]# yum clean all
Loaded plugins: katello, product-id, security, subscription-manager
Updating certificate-based repositories.
Unable to read consumer identity
Cleaning up Everything</pre>获取yum列表
<pre>[root@localhost yum.repos.d]# yum makecache
Loaded plugins: katello, product-id, security, subscription-manager
Updating certificate-based repositories.
Unable to read consumer identity
addons | 1.9 kB 00:00
addons/filelists_db | 570 B 00:00
addons/other_db | 554 B 00:00
addons/primary_db | 1.1 kB 00:00
base | 1.1 kB 00:00
base/filelists | 3.7 MB 00:11
base/other | 14 MB 01:04
base/group | 1.1 MB 00:03
base/primary | 1.3 MB 00:06
epel | 3.6 kB 00:00
epel/filelists_db | 4.1 MB 00:16
epel/updateinfo | 510 kB 00:02
epel/other_db | 1.6 MB 00:05
epel/primary_db | 2.9 MB 00:14
extras | 2.1 kB 00:00
extras/filelists_db | 224 kB 00:00
extras/other_db | 442 kB 00:01
extras/group | 9.7 kB 00:00
extras/primary_db | 173 kB 00:00
updates | 1.9 kB 00:00
updates/filelists_db | 2.1 MB 00:09
updates/other_db | 11 MB 00:29
updates/primary_db | 531 kB 00:00
base 3667/3667
base 3667/3667
base 3667/3667
Metadata Cache Created</pre>搜索安装
<pre>[root@localhost ~]# yum search gcc |grep --color '^gcc'
gcc.x86_64 : Various compilers (C, C++, Objective-C, Java, ...)
gcc-c++.x86_64 : C++ support for GCC
gcc-gfortran.x86_64 : Fortran 95 support
gcc-gnat.x86_64 : Ada 95 support for GCC
gcc-java.x86_64 : Java support for GCC
gcc-objc++.x86_64 : Objective-C++ support for GCC
gcc-objc.x86_64 : Objective-C support for GCC
gcc44.x86_64 : GNU Compiler Collection version 4.4
gcc44-c++.x86_64 : C++ support for GCC version 4.4
gcc44-gfortran.x86_64 : Fortran support for GCC 4.4</pre>安装gcc
<pre>[root@localhost yum.repos.d]# yum -y install gcc</pre>
至此gcc安装完成。注意
安装pcre-8.39 执行./configure的时候出现错误
<pre>configure: error: You need a C++ compiler for C++ support</pre>解决办法：
<pre>yum install -y gcc gcc-c++</pre>
