Fortran newsletter: May 2021

01 May 2021

Authors: Sebastian Ehlert, Alexis Perry-Holby, Milan Curcic, Ondřej Čertík, Laurence Kedward

Welcome to the May 2021 edition of the monthly Fortran newsletter. The newsletter comes out at the beginning of every month and details Fortran news from the previous month.

fortran-lang.org

This month we’ve had several updates to the website:

#244: Add a first year announcement
#236: Add dl_poly_4 to package index
#220: Include learn resources to online courses

Ongoing work:

#201 (WIP): Internationalization for fortran-lang
#246 (WIP): Transferring fortran90.org “Fortran Best Practise” into a mini-book

Let us know if you have any suggestions for the website and its content. We welcome any new contributors to the website and the tutorials page in particular - see the contributor guide for how to get started.

Fortran Standard Library

Here’s what’s new in stdlib:

#391: Add issue templates
#388: Changed filenames for bitset tests
#384: Implement starts_with and ends_with functions
#367: Add Intel compiler workflow for OSX
#360: Summarize build toolchain workflow and implied rules
#343: Implement strip and chomp as supplement to trim
#336: Add functions to convert integer/logical values to character values

Work in progress:

#189 (WIP): Initial implementation of sparse matrices.
#272 (WIP), #273 (WIP), #276 (WIP), #278 (WIP): Implementation of the stdlib_stats_distribution modules. It provides probability distribution and statistical functions.
#311 (WIP): Implementation of a module for handling lists of strings
#313 (WIP): Legendre polynomials and Gaussian quadrature
#333 (WIP): Provide abstract base class for a string object
#349 (WIP): Simplify test makefile
#353 (WIP): Initial checkin for a module for tolerant comparison of reals
#355 (WIP): Implement clip function
#359 (WIP): Add general contributing guidelines to stdlib
#363 (WIP): Add sort to stdlib_string_type module
#372 (WIP): Correct implementation of to_title
#386 (WIP): Start the addition of the module stdlib_sorting

Please help improve stdlib by testing and reviewing pull requests!

The candidate for file system operations to be included in stdlib is being developed by @MarDiehl and @arjenmarkus in this repository. Please try it out and let us know how it works, if there are any issues, or if the API can be improved.

Fortran Package Manager

Here’s what’s new in fpm:

#420: Phase out Haskell fpm
#468: Identify OpenBSD
#465: Fix typo in README
#442: Use lib instead of ar on Windows
#440: Minor edits to README
#438: Add external-modules key to build table for non-fpm modules
#437: Remove coarray single from default Intel flags
#433: Fix to allow compiling C with Intel CC
#431: Use different compiler flags on differnt platforms for Intel
#429: Use wget if curl is missing in install.sh

Work in progress:

First beta release (WIP): First feature-complete release of the Fortran implementation.
#364 (WIP): Plugin alpha version
#423 (WIP): Use default instead of master to reference the repository HEAD
#444 (WIP): Allow to find include files / modules in CPATH environment variable
#449 (WIP): Response files with ar on Windows
#450 (WIP): Remove coarray flag from intel debug settings
#451 (WIP): Refactor: use objects to represent compilers and archiver

fpm is still in early development and we need as much help as we can get. Here’s how you can help today:

Use it and let us know what you think! Read the fpm packaging guide to learn how to build your package with fpm, and the manifest reference to learn what are all the things that you can specify in the fpm.toml file.
Browse existing fpm packages on the fortran-lang website
Browse the open issues and see if you can help implement any fixes or features.
Adapt your Fortran package for fpm and submit it to the Registry.
Improve the documentation.

The short-term goal of fpm is to make development and installation of Fortran packages with dependencies easier. Its long term goal is to build a rich and decentralized ecosystem of Fortran packages and create a healthy environment in which new open source Fortran projects are created and published with ease.

Compilers

Classic Flang

A total of 5 pull requests were merged in April.

LLVM Flang

Recent development updates:

OpenMP
- [OPENMP5.1]Initial support for novariants clause.
- [OPENMP5.1]Initial support for nocontext clause.
- Add functionality to check “close nesting” of regions, which can be used for Semantic checks
- [OpenMP5.1] Initial support for masked directive and filter clause
- Modify semantic check for nesting of ordered regions to include close nesting check.
- Remove OmpEndLoopDirective handles from code.
- Add General Semantic Checks for Allocate Directive
New Driver
- Add options for -Werror
- Modify the existing test cases that use -Mstandard in f18, to use -pedantic and %flang_fc1 to share with the new driver
- Add support for -cpp/-nocpp
- Fix -fdebug-dump-provenance
- Add debug options not requiring semantic checks
- Remove %flang-new from the LIT configuration
- Update the regression tests to use the new driver when enabled
- Add support for -fget-definition
Move .f77 to the list of fixed-form file extensions
Runtime
- Implement reductions
- Implement numeric intrinsic functions
- TRANSFER() intrinsic function
- RANDOM_NUMBER, RANDOM_SEED, RANDOM_INIT
- Implement IPARITY, PARITY, and FINDLOC reductions
Fix unit test failure on POWER
Improve constant folding for type parameter inquiries
Check for conflicting BIND(C) names
Enforce a limit on recursive PDT instantiations
Accept & fold IEEE_SELECTED_REAL_KIND
Define missing & needed IEEE_ARITHMETIC symbols
Handle instantiation of procedure pointer components
Fix checking of argument passing for parameterized derived types
Fix spurious errors from runtime derived type table construction
Check for attributes specific to dummy arguments
Handle structure constructors with forward references to PDTs

Call notes will be sent to the flang-dev email list and also recorded here.

LFortran

98 Merge Requests merged in April
Working towards compiling the SNAP proxy app (#313):
- Code can be parsed to AST and transformed back to source code which compiles with other compilers and works
- About 3rd of the files can be transformed from AST to ASR and the modules saved
Other improvements:
- Runtime library (more functions work)
- Nested functions
- Derived types

Events

We had our 11th Fortran Monthly call on April 22. You can watch the recording below:

Wadud Miah (@wadudmiah) from the University of Southampton presented a webinar on Fortran for High Performance Computing, organized by Excellerat. You can find the slides and the recording here.

As usual, subscribe to the mailing list and/or join the Discourse to stay tuned with the future meetings.

Contributors

We thank everybody who contributed to fortran-lang in the past month by commenting in any of these repositories:

First year of the Fortran website

20 April 2021

Authors: Ondřej Čertík, Milan Curcic, Brad Richardson, Laurence Kedward

In April 2020 we created a website for the Fortran language at fortran-lang.org. In exactly one year, it grew to be the first result when you search “Fortran” in Bing, Yahoo, DuckDuckGo, Ecosia, Qwant, SearchEncrypt and the second result in Google (after the Wikipedia page for Fortran).

Fortran newsletter: April 2021

01 April 2021

Authors: Sebastian Ehlert, Alexis Perry-Holby, Laurence Kedward, Milan Curcic, Ondřej Čertík

Welcome to the April 2021 edition of the monthly Fortran newsletter. The newsletter comes out at the beginning of every month and details Fortran news from the previous month.

Fortran-lang accepted to Google Summer of Code 2021

09 March 2021

Authors: Ondřej Čertík, Milan Curcic, Sebastian Ehlert, Laurence Kedward, Arjen Markus, Brad Richardson, Damian Rouson, Marshall Ward

We are excited to announce that Fortran-lang has been accepted as a Google Summer of Code (GSoC) 2021 mentoring organization! 🎉

Fortran newsletter: March 2021

01 March 2021

Authors: Milan Curcic, Laurence Kedward, Ondřej Čertík

Welcome to the March 2021 edition of the monthly Fortran newsletter. The newsletter comes out at the beginning of every month and details Fortran news from the previous month.

News

Fortran newsletter: May 2021	01 May 2021
First year of the Fortran website	20 Apr 2021
Fortran newsletter: April 2021	01 Apr 2021
Fortran-lang accepted to Google Summer of Code 2021	09 Mar 2021
Fortran newsletter: March 2021	01 Mar 2021

More…