Centos升级gcc版本

步骤1：查看当前服务器gcc版本

gcc –version

步骤2：查看当前gcc安装目录

find / -name gcc

cd /usr/bin

ll gcc*

因为gcc，g++，c++都是配套的,查找出 g++和c++的原版本位置

步骤3：安装下载依赖包

yum install glibc-headers gcc-c++  gcc gmp  gmp-devel  mpfr  mpfr-devel  libmpc  libmpc-devel

yum install libffi-devel

./contrib/download_prerequisites

步骤4：安装依赖包

cd /*自己的目录*/gcc-11.4.0/mpfr-3.1.6

./configure --prefix=/usr/local/ mpfr-3.1.6

make

make install

cd /*自己的目录*/gcc-11.4.0/mpc-1.0.3

./configure --prefix=/usr/local/ mpc-1.0.3

make

make install

cd /*自己的目录*/gcc-11.4.0/gmp-6.1.0

./configure --prefix=/usr/local/ gmp-6.1.0

make

make install

cd /*自己的目录*/gcc-11.4.0/isl-0.18

./configure --prefix=/usr/local/ isl-0.18

make

make install

修改环境变量vim ~/.bashrc,添加如下

export LD_LIBRARY_PATH=:$LD_LIBRARY_PATH:/usr/local/mpc-1.0.3/lib

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/gmp-6.0.1/lib

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpfr-3.1.6/lib

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/isl-0.18/lib

export LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/

使环境变量生效   source  ~/.bashrc

步骤5：安装gcc

进入目录/*自己的目录*/gcc-11.4.0/，新建build文件夹，进入该文件夹，执行以下命令

../configure --prefix=/usr/local/gcc-11.4.0 --with-gmp=/usr/local/gmp-6.0.1/ --with-mpfr=/usr/local/mpfr-3.1.6/ --with-mpc=/usr/local/mpc-1.0.3/ --with-isl=/usr/local/isl-0.18 --with-system-zlib --disable-multilib

再执行如下命令：

make

make install

成功后如下图所示：

修改环境变量~/.bashrc，添加如下

使环境变量生效  ~/.bashrc

步骤6：更新gcc软连接

cd /usr/bin

更新gcc

mv gcc gcc.bak

ln -s /usr/local/gcc-11.4.0/bin/gcc /usr/bin/gcc

更新g++

mv g++ g++.bak

ln -s /usr/local/gcc-11.4.0/bin/g++ /usr/bin/g++

更新c++

mv c++ c++.bak

ln -s /usr/local/gcc-11.4.0/bin/c++ /usr/bin/c++

更新libstdc++.so.6

cd /usr/lib64/

cp /usr/local/gcc-11.4.0/lib64/libstdc++.so.6.0.29 /usr/lib64/

mv libstdc++.so.6 libstdc++.so.6.bak

ln -s /usr/lib64/libstdc++.so.6.0.29 /usr/lib64/libstdc++.so.6

步骤7：测试新版本gcc

最后：出错解决方式

出错：gcc configure: error: C compiler cannot create executables

解决：查找日志Config.log，在里面搜索error，定位到问题

问题：error while loading shared libraries: libmpc.so.2: cannot open shared object file: No such file or directory

解决：[student2@node01 ~]$ locate libmpc.so.2

/opt/software/mpc-0.8.1/lib/libmpc.so.2

/opt/software/mpc-0.8.1/lib/libmpc.so.2.0.0

将export LD_LIBRARY_PATH=/opt/software/mpc-0.8.1/lib/:$LD_LIBRARY_PATH 添加到环境变量~/.bashrc,执行source  ~/.bashrc使环境变量生效

问题：locate: command not found

解决：yum  -y install mlocate

问题：locate: can not stat () `/var/lib/mlocate/mlocate.db': No such file or directory

解决：updatedb

问题

解决：在环境变量中添加export LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/