{{ :supportukraine.gif|}}
====== Compiler: Installing multiple GCC compilers on a CentOS 7 system with Tux ======

{{en:tux.png |Hey, my name is "Tux"!}} **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.

----

\\

===== Start of tutorial =====

Installing required tools and a //GCC// compiler from default repository:
<cli>$ yum install git make gmp-devel mpfr-devel libmpc-devel</cli>
<cli>$ yum groupinstall "Development Tools"</cli>
Now navigate to the following directory:
<cli>$ cd /tmp</cli>
Download the desired //GCC// release:
\\ Note: Replace the following placeholders ''<x>'' with the release number according to the desired //GCC// release:
<cli>$ curl https://ftp.gnu.org/gnu/gcc/gcc-<x>.<x>.<x>/gcc-<x>.<x>.<x>.tar.gz -O</cli>
Now decompress the downloaded package:
<cli>$ tar -zxvf gcc-<x>.<x>.<x>.tar.gz</cli>
Now create a temporary build directory:
<cli>$ mkdir gcc-<x>.<x>.<x>-build</cli>
Navigate into that build directory:
<cli>$ cd gcc-<x>.<x>.<x>-build</cli>
Execute //Makefile// configuration:
<cli>$ ../gcc-<x>.<x>.<x>/configure --enable-languages=c,c++ --disable-multilib --prefix=/usr/local/gcc-<x>.<x>.<x></cli>
Start compiling:
<cli>$ make -j$(nproc) && make install</cli>
Now the installation should be done.
\\ By going the described way it is possible to install multiple //GCC// compilers in parallel.
\\ Now when it is required to set a specific compiler version for //CMAKE// there are two settings required to be set each time:
\\ <color #ed1c24>Beware: The following two settings are only applied temporary for the current session by the operating system. If it is required to set a specific default //GCC// version have a look on the info box //Optional// further down.</color>
  - Attaching the path of the desired //GCC// compiler version's executables in global path settings: \\ <cli>$ export PATH=/usr/local/gcc-<x>.<x>.<x>/bin:$PATH</cli>
  - Attaching the path of the desired //GCC// compiler version's //Shared Libraries// in global library path settings: \\ <cli>$ export LD_LIBRARY_PATH=/usr/local/gcc-<x>.<x>.<x>/lib64:$LD_LIBRARY_PATH</cli>

Check whether the desired //GCC// version is being used by system now:
<cli>$ gcc --version</cli>

<box 97% | Optional>
If it is required to set a specific default //GCC// compiler version for the operating system global path variables and global library path variables have to be set inside the following file:
\\
\\
<cli>$ vi /etc/profile</cli>
Add the following content:
<code>export PATH=/usr/local/gcc-<x>.<x>.<x>/bin:$PATH
export LD_LIBRARY_PATH=/usr/local/gcc-<x>.<x>.<x>/lib64:$LD_LIBRARY_PATH
</code>
Save the file and quit the editor.
\\
\\ Now reboot the system:
<cli>$ reboot -h now</cli>
Check whether the desired default //GCC// version is being used by system now:
<cli>$ gcc --version</cli>
</box>

\\

===== End of tutorial =====

\\
\\
Appreciate my work? \\ [[https://www.buymeacoffee.com/fabioU|Buy me a coffee]] {{:buymeacoffee.png|}} or [[https://www.paypal.com/donate/?hosted_button_id=TH8Q3NTJCAJBA|PayPal]] {{:paypal.png|}}
\\
\\

{{htmlmetatags>metatag-robots=()}}