GFortran

GNU Fortran is the Fortran compiler front end and run-time libraries for GCC, the GNU Compiler Collection.

GFortran is available on all Linux distributions and can be installed using the package manager.

Before you begin

Follow the instructions below to install and use gfortran on an Arm Linux distribution.

Confirm you are using an Arm machine by running:

    

        
        
            uname -m
        
    

The output should be:

    

        
        aarch64

        
    

If you see a different result, you are not using an Arm computer running 64-bit Linux.

Download

The Linux package manager downloads the required files so there are no special instructions.

Installation

Installing on Debian based distributions such as Ubuntu

Use the apt command to install software packages on any Debian based Linux distribution, including Ubuntu.

    

        
        
            sudo apt update
sudo apt install gfortran -y
        
    

Installing on Red Hat / Fedora / Amazon Linux

These Linux distributions use yum as the package manager.

To install the most common development tools use the commands below. If the machine has sudo you can use it.

    

        
        
            sudo yum update -y
sudo yum install gcc-gfortran -y
        
    

If sudo is not available become root and omit the sudo.

    

        
        
            sudo yum update -y
sudo yum install gcc-gfortran -y
        
    

Setting up product license

Arm GNU Toolchain is open source and freely available for use. No licenses need to be set up for use.

Get started

To confirm the installation is complete run:

    

        
        
            gfortran --version
        
    

To compile an example program, create a text file named hello.f90 with the contents below.

    

        
        
            program hello
  ! This is a comment line; it is ignored by the compiler
  print *, 'Hello, Arm world!'
end program hello
        
    

To compile the program use:

    

        
        
            gfortran hello.f90 -o hello
        
    

To run the application use:

    

        
        ./hello

        
    

The program will print the string specified in the print statement.