Did you ever wonder how you can install multiple GCC compilers on your Linux system?
Hey, my name is "Tux" and this tutorial will show you how you can get multiple GCC compilers on a single Linux system in case you need it running in parallel.
Installing required tools and a GCC compiler from default repository:
$ yum install git make gmp-devel mpfr-devel libmpc-devel
$ yum groupinstall "Development Tools"
Now navigate to the following directory:
$ cd /tmp
Download the desired GCC release:
Note: Replace the following placeholders
<x> with the release number according to the desired GCC release:
$ curl https://ftp.gnu.org/gnu/gcc/gcc-<x>.<x>.<x>/gcc-<x>.<x>.<x>.tar.gz -O
Now decompress the downloaded package:
$ tar -zxvf gcc-<x>.<x>.<x>.tar.gz
Now create a temporary build directory:
$ mkdir gcc-<x>.<x>.<x>-build
Navigate into that build directory:
$ cd gcc-<x>.<x>.<x>-build
Execute Makefile configuration:
$ ../gcc-<x>.<x>.<x>/configure --enable-languages=c,c++ --disable-multilib --prefix=/usr/local/gcc-<x>.<x>.<x>
$ make -j$(nproc) && make install
Now the installation should be done.
By going the described way it is possible to install multiple GCC compilers in parallel.
Now when it is required to set a specific compiler version for CMAKE there are two settings required to be set each time:
Beware: The following two settings are only applied temporary for the current session by the operating system. If it is required to set a specific default GCC version have a look on the info box Optional further down.
$ export PATH=/usr/local/gcc-<x>.<x>.<x>/bin:$PATH
$ export LD_LIBRARY_PATH=/usr/local/gcc-<x>.<x>.<x>/lib64:$LD_LIBRARY_PATH
Check whether the desired GCC version is being used by system now:
$ gcc --version
$ vi /etc/profile
Add the following content:
export PATH=/usr/local/gcc-<x>.<x>.<x>/bin:$PATH export LD_LIBRARY_PATH=/usr/local/gcc-<x>.<x>.<x>/lib64:$LD_LIBRARY_PATH
Save the file and quit the editor.
Now reboot the system:
$ reboot -h now
Check whether the desired default GCC version is being used by system now:
$ gcc --version