Step-by-step – GCC 11.1 Installation in Ubuntu 20.04 Guide

Installing GCC

6. 6. Setting up Environment

   Next Set Libraries Env Variable
   Eventually to Check the Target run:

   find /usr/ -name crti*

   Then Output should be as:
   /usr/lib/x86_64-linux-gnu/crti.o
   So in this case then to Set up the Environment Variables use:

   export LIBRARY_PATH=/usr/lib/x86_64-linux-gnu

   And then amend the User’s Path to append the New shared Libraries:

   echo "export LD_LIBRARY_PATH=/usr/lib:/usr/local/lib:/usr/local/lib64:/usr/lib/x86_64-linux-gnu" >> ~/.bashrc

   Last, to reload it:

   bash

7. 7. Installing GCC 11.1

   Finally, to Install GCC 11.1 on Ubuntu 20.04
   First, make a Build Directory:

   mkdir build

   Then entry it:

   cd build

   Configuring with:

   ../configure --enable-languages=c,c++,fortran,objc,obj-c++,go --prefix="/usr/local"

   Possibly customize the “languages” choiches in the above Command. To enable ADA and D Support see the Official Documentation.
   And then making it:

   make -j $(nproc)

   This Command to make it quicker using Multiples CPU Cores.
   Now take a long Time Out because the Build process will run for a while…
   Last, to make the Installation:

   sudo make install