Centos install high version GCC

CentOS7.2 install high version gcc

Other centos series can be referred to, untested, if you have any questions, you can leave a message to discuss

Because some relatively new software requires the latest version of gcc, the version 4.8.5 installed by centos 7.2 using yum install gcc may not meet the requirements of the software. Here is how to toss the latest version of GCC

GCC official website: https://gcc.gnu.org/

My current version is 9.3, so we install the latest version:

01

Installation base dependent environment

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

02

download

**There are many GCC download addresses. We download the gcc source code package from the domestic hust mirror station. **

http://mirror.hust.edu.cn/gnu/gcc/

I chose gcc-9.3.0.tar.gz.

cd
mkdir software
cd software
wget http://mirror.hust.edu.cn/gnu/gcc/gcc-9.3.0/gcc-9.3.0.tar.gz
tar zxvf gcc-9.3.0.tar.gz
cd cc-9.3.0

03

Download the dependency package:

. /contrib/download_prerequisites

04

Configuration

mkdir buildcd build../configure --prefix=/usr/local/gcc-9.3.0/ --enable-checking=release --enable-languages=c,c++ --disable-multilib

configure is an executable script that has many options. Use the command ./configure –help to output a detailed list of options in the source path to be installed. The --prefix option is to configure the installation path.

If the --prefix option is not configured, after installation:

The executable file is placed in /usr /local/bin by default,

The library files are placed in /usr/local/lib by default,

The configuration file is placed in /usr/local/etc by default,

Other resource files are placed in /usr /local/share

Detailed explanation of configure parameters:

- - prefix=/usr/local/gcc-9.3.0/: Put all resource files under this path.

- - enable-checking=release: The generated compiler does not perform additional checks during the compilation process.

- - enable-languages=c,c++: Let gcc support c, c++.

- - disable-multilib: Does not generate a cross-compiler compiled into executable code for other platforms.

05

Compile

make

This process takes a long time. Need to be patient

06

installation

make install

07

Aftermath

**If you have not made any mistakes in the above steps, then you have succeeded 90%, and we need some aftermath work: **

01

Delete the old version of gcc downloaded by yum

yum remove gcc

02

Add the new version of gcc to the command search path:

ln -s /usr/local/gcc-9.3.0/bin/gcc /usr/bin/gcc
ln -s /usr/local/gcc-9.3.0/bin/g++/usr/bin/g++

03

Add LD_LIBRARY_PATH environment variable

Add the following code in /etc/profile:

# gccLD_LIBRARY_PATH=/usr/local/gcc-9.3.0/lib#export LD_LIBRARY_PATH

Execute after changing

source /etc/profile

04

Finally replace libstdc++.so.6

cp /usr/local/gcc-9.3.0/lib64/libstdc++.so.6.0.28/usr/lib64/libstdc++.so.6.0.28
rm -f /usr/lib64/libstdc++.so.6
ln -s /usr/lib64/libstdc++.so.6.0.28/usr/lib64/libstdc++.so.6

For those who do not understand the fourth step, you can use

strings /usr/local/gcc-9.3.0/lib64/libstdc++.so.6.0.28| grep GLIBCXX

Compare the difference between /libstdc++.so.6 before and after replacement

If you have any questions, please leave a message, we will toss together