Upgrading GCC

Upgrade the GCC version to 5.3 or later. The following describes how to upgrade GCC to 7.3.

Download GCC 7.3.0.
URL: https://mirrors.tuna.tsinghua.edu.cn/gnu/gcc/gcc-7.3.0/gcc-7.3.0.tar.gz
Upload the software package to the /home directory and decompress it.
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cd /home tar -xvf gcc-7.3.0.tar.gz

Install GCC.

Go to the GCC directory decompressed.

        
             cd /home/gcc-7.3.0

Perform configuration.

          
               ./configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-bootstrap

---prefix=path: specifies the installation directory of the GCC software. The default directory is /usr.
--mandir=path: specifies the GCC software document directory. The default directory is /usr/share/man.
--infodir=path: specifies the directory in which the GCC log information is stored. The default directory is /usr/share/info.
--enable-bootstrap: enables bootstrap installation.

If error "configure: error: no acceptable C compiler found in $PATH" is reported during the configuration, run the yum -y reinstall gcc gcc-c++ command.

Compile the GCC source code.
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make -j96
In the command, -j96 can make full use of the multi-core feature of the CPUs to accelerate the compilation. The number following -j indicates the number of CPU cores. You can run the cat /proc/cpuinfo | grep processor | wc -l command to query the number of CPU cores. The value specified must be less than or equal to the actual number of CPU cores.
Start the installation.
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make -j96 install

Check whether the GCC version is 7.3.0.
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gcc -v

Parent topic: Configuring the Compilation Environment