Fortran

Fortran is a general-purpose, compiled imperative programming language that is especially suited to numeric computation and scientific computing.

From the Fortran Community (fortran-lang) site:

Fortran is mature and under active development. The latest revision of the language is Fortran 2023. There are over a dozen open source and proprietary Fortran compilers. Further, open source projects like the Standard Library and the Fortran Package Manager are under active development.

Compilers

The gcc-fortran package enables the Fortran front-end for GCC.

Other Fortran compilers available for Arch Linux include

lfortran — Modern interactive Fortran compiler built on top of LLVM

https://lfortran.org || lfortran^AUR

(LLVM) Flang — New LLVM front-end for Fortran 2018 implemented in modern C++

https://flang.llvm.org/ || flang^AUR

Flang (classic) — Out-of-tree Fortran compiler targeting LLVM (to be replaced by the new Flang in the future)

https://github.com/flang-compiler/flang || flang-classic^AUR

See also fortran-lang for a list of open-source and commercial compilers. Check your compiler's documentation to verify which standards it conforms to and what language extensions it provides.

Additional packages

Fortran Standard Library — Aims to provide a community driven and agreed upon de facto "standard" library for Fortran

https://stdlib.fortran-lang.org/ || fortran_stdlib^AUR

Fortran Package Manager — Package manager and build system for Fortran

https://stdlib.fortran-lang.org/ || fortran-fpm^AUR fortran-fpm-bin^AUR

fortls — Fortran Language Server

https://fortls.fortran-lang.org/ || fortls^AUR

FORD — Generates documentation from code comments.

https://github.com/Fortran-FOSS-Programmers/ford || ford^AUR

f2c — Fortran to C code translator

https://www.netlib.org/f2c/ || f2c^AUR