Get Started with the Intel® Fortran Compiler Classic and Intel® Fortran Compiler

ID 767260
Date 3/31/2023
Public

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Get Started on macOS*

Before You Begin

NOTE:
macOS is not supported for the ifx compiler.

Before you can use this tool, you must first set the environment variables by sourcing the environment script using the initialization utility to initialize all the tools in one step.

From a terminal session, run:

source <install_dir>/setvars.sh

By default, the path for <install_dir> is /opt/intel/oneapi

Use the Command Line

Invoke the compiler using the following syntax:

ifort [option] file1 [file2...] [/link link_options]

For example: ifort helloworld.f90

Build a Program

Follow the steps below to test your compiler installation and build a program.

  1. Use a text editor to create a file called hello.f90 with the following contents:
    print *, "Hello, world!"
    end
  2. From a command prompt, issue the following command using a BASH-style shell:
    . /<install_dir>/setvars.sh

    This command adds the compiler directors to PATH and updates LD_LIBRARY_PATH to make it easier to run a Fortran program.

    The command to invoke the setup script must be done in any command window where you want to use the Intel® Fortran Compiler. Alternatively, the command can be added to a .bashrc or other shell startup file.

  3. From the command prompt, issue the following command:
    ifort –o hello hello.f90
  4. Now you have an executable called hello, which can be run and will give immediate feedback.
    hello

    Which outputs:

    Hello, world!