# GFortran

## About this Install Guide

| Reading time: | 15 min |
|---------------|--------|
| Last updated: | 22 Jun 2026 |
| Author:       | Florent Lebeau, Arm |
| Official docs:| [View](https://gcc.gnu.org/onlinedocs/gfortran/) |

This guide shows you how to install and use the tool with the most common configuration. For advanced options and complete reference information, see the official documentation. Some install guides also include optional next steps to help you explore related workflows or integrations.

[GNU Fortran](https://gcc.gnu.org/fortran/) is the Fortran compiler front end and run-time libraries for GCC, the GNU Compiler Collection.

## How do I prepare to install and use gfortran on an Arm Linux distribution?

Confirm you are using an Arm machine by running:

```bash
uname -m
```

The output should be:

```bash
__output__ aarch64
```

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

## How do I download gfortran using the Linux package manager?

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

### How do I install gfortran on Debian-based distributions such as Ubuntu?

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

```bash
sudo apt update
sudo apt install gfortran -y
```

### How do I install gfortran on Red Hat, Fedora, or 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.

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

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

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

## Do I need to set up a product license for gfortran?

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

## How do I verify the gfortran installation and get started?

To confirm the installation is complete run:

```bash
gfortran --version
```

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

```fortran
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:

```bash
gfortran hello.f90 -o hello
```

To run the application use:

```bash
./hello
```

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