gcc属于gun软件，下载gun所有软件

ftp://ftp.gnu.org/gnu/

ftp://ftp.gnu.org/gnu/gcc



1, 编译gcc的时候，还是需要存在gcc, g++

2, 等编译完成，卸载系统的gcc, g+++

3, 测试c++11

[chunli@CentOS~]$sudoyuminstallgccgcc-c++[chunli@CentOS~]$wgetftp://ftp.gnu.org/gnu/gcc/gcc-4.8.5/gcc-4.8.5.tar.bz2[chunli@CentOS~]$taxxfgcc-4.8.5.tar.bz2[chunli@CentOS~]$cdgcc-4.8.5[chunli@CentOSgcc-4.8.5]$./contrib/download_prerequisites[chunli@CentOSgcc-4.8.5]$echo$?[chunli@CentOSgcc-4.8.5]$./configure--enable-checking=release--enable-languages=c,c++--disable-multilib[chunli@CentOSgcc-4.8.5]$echo$?[chunli@CentOSgcc-4.8.5]$make[chunli@CentOSgcc-4.8.5]$echo$?[chunli@CentOSgcc-4.8.5]$sudoyumremovegccg++gcc-c++[chunli@CentOSgcc-4.8.5]$sudomakeinstall[chunli@CentOSgcc-4.8.5]$echo$?[chunli@CentOSgcc-4.8.5]$logout#重新登录一次，识别新的gcc文件路径chunli@linux:~$sshchunli@172.16.20.118[chunli@CentOS~]$gcc--versiongcc(GCC)4.8.5[chunli@CentOS~]$g++--versiong++(GCC)4.8.5



测试C++11

测试C++11[chunli@CentOS~]$catmain.cpp#include<iostream>usingnamespacestd;intmain(intargc,char**argv){autofn=[](inta,intb){returna+b;};intc=fn(2,3);cout<<"result:"<<c<<endl;return0;}[chunli@CentOS~]$g++-std=c++11main.cpp&&./a.outresult:5[chunli@CentOS~]$