CentOS7更新openssl,gcc库

CentOS7更新openssl

报错信息error while loading shared libraries: libssl.so.1.1: cannot open shared obje

#查看版本
openssl version -a

#cd到usr/local下
cd /usr/local
#wget下载openssl包
wget https://www.openssl.org/source/openssl-1.1.1l.tar.gz
#然后解压
tar -zxvf  openssl-1.1.1l.tar.gz
#进入解压后的目录
cd openssl-1.1.1l
#然后配置安装目录，prefix 是安装目录，openssldir 是配置文件目录，另外建议安装两次，shared 作用是生成动态连接库。(一行一行执行)
./config  --prefix=/usr/local --openssldir=/usr/local/ssl
make && make install
./config shared --prefix=/usr/local --openssldir=/usr/local/ssl
make clean
make&& make install
#然后再通过命令查看版本
openssl version -a
#如果提示还报错
error while loading shared libraries: libssl.so.1.1: cannot open shared obje
#创建软链接
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
#还报错
error while loading shared libraries: libssl.so.1.1: cannot open shared obje
#创建软链接
ln -s /usr/local/lib64/libssl.so.1.1 /usr/lib64/libssl.so.1.1
ln -s /usr/local/lib64/libcrypto.so.1.1 /usr/lib64/libcrypto.so.1.1

CentOS7编译gcc

报错信息/lib64/libstdc++.so.6: version `CXXABI_1.3.8' not found ....

#重新编译gcc
strings /usr/lib64/libstdc++.so.6 | grep CXXABI
#安装gmp-devel mpfr-devel libmpc-devel
yum install gmp-devel mpfr-devel libmpc-devel -y
#创建gcc文件夹
cd /usr/local
mkdir gcc
#下载gcc-9.2.0包
wget ftp://ftp.gnu.org/gnu/gcc/gcc-9.2.0/gcc-9.2.0.tar.xz
#解压包
xz -d gcc-9.2.0.tar.xz
tar -vxf gcc-9.2.0.tar
#进入文件夹
cd gcc-9.2.0
./configure --disable-multilib --enable-languages=c,c++ --prefix=$HOME/local
make -j4   # -j4  四个进程
make -j install
#配置环境变量
vim /etc/profile
export PATH=$HOME/local/bin:$PATH
export LD_LIBRARY_PATH=$HOME/local/lib64
source /etc/profile
#进入文件夹
cd /root/local/lib64
#查看新编译的gcc
ll libstdc++.so*

cd /usr/lib64/
ll libstdc++.so*
#删除连接
mv libstdc++.so.6 libstdc++.so.6.bak
#建立新的连接
ln -s /root/local/lib64/libstdc++.so.6.0.27 libstdc++.so.6