Fortran Wiki
Compilers

Free and Open Source Compilers

• GFortran - The Fortran compiler from the GNU project. In 2023, GFortran nearly implements all of the Fortran 2008 standard and partially Fortran 2018. It is available on many platforms.
• LFortran - Modern interactive LLVM-based Fortran compiler
• Flang - Flang is a Fortran compiler targeting LLVM. Supports Fortran 2003 and parts of Fortran 2008 available for Linux [x86_64 and OpenPower]
• LLVM Dragonegg - A GCC plugin that replaces GCC’s optimizers and code generators with those from the LLVM project.
• Experimental:
  • OpenUH - In development. A compiler for Fortran 2008 Coarrays and OpenACC.
• F77 Only:
  • Open Watcom
  • G77
  • f2c Compiles f77 to C
  • f2j Compiles a subset of f77 to java
  • lcc-win32 fortran Windows Fortran 77, not actively developed.
  • Open Fortran Compiler Transforms F77 into F90 with non-standard extensions removed.
• Discontinued
  • G95. Last release: 2013
  • AMD x86 Open64 Compiler Suite replaced by AOCC. Last release: 2013

Freemium proprietary Compilers:

• PGI Community Edition - Free edition of the parallelizing compiler from The Portland Group. Supports OpenACC and parts of Fortran 2008. Available for Linux, macOS, and Windows.
• Oracle Developer Studio - Compiler suite from Oracle. Supports Fortran 2003 and is available for Solaris and Linux.
• Silverfrost - free for personal use

Commercial Compilers

• Cray PE - Includes Fortran, C, and C++
• IBM Fortran Compiler Family
• Intel Fortran compilers - free - Includes the classical ifort and the new ifx LLVM based compiler.
• NAG Fortran compiler
• NVIDIA HPC SDK C, C++, and Fortran compilers - free
• The Portland Group
• TWE Fortran (77)
• Arm Fortran Compiler
• Discontinued
  • Absoft since 31th December 2022. Absoft Afterthoughts
  • Lahey/Fujitsu Fortran since 31th December 2022.
  • PathScale
  • EKOPath - a compiler suite from PathScale

External Links

• Fortran Compilers described at fortran-lang.org

• Polyhedron Software compiler comparisons

• HECToR Fortran Compiler Performance Comparison

• Summary of Mac Fortran Compiler options

• A performance comparison of Mac Fortran compilers

• Compiler support for Fortran 2008 and 2018 - PDF file. This is updated regularly and also appears in ACM Fortran Forum.

• fortran-compiler-tests collection of Fortran compiler bug examples and tests.

Live Fortran

• online_compilers - Try Fortran on-line via a WWW browser