Fortran 时事通讯：2021 年 9 月#

Welcome to the September 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#

本月我们对网站进行了几次更新：

  • #303: Add NJOY to package index

Work in progress#

  • #302 (WIP): Update Silverfrost compiler description.

  • #300 (WIP): Add QCxMS to package index

  • #246 (WIP): Transferring fortran90.org “Fortran Best Practices” into a mini-book

  • #201 (WIP)：fortran-lang 的国际化

让我们知道 如果你对网站及其内容有任何建议。我们欢迎任何新的贡献者加入网站，尤其是教程页面 —— 请参阅 贡献者指南 了解如何开始。

Fortran 标准库#

Here’s what’s new in stdlib:

  • #467: Implemented move_alloc for string_type

  • #470: Revival string list

  • #481: [stdlib_linalg] Update eye function.

  • #493: Update copyright and remove old artifact

  • #444: Add format_string routine to format other types to strings

  • #483: Remove GCC Fortran MinGW 8.4.0 from known to work list

Work in progress#

  • #501 (WIP): Minor updates to README.md

  • #500 (WIP): Selection algorithms

  • #499 (WIP): [stdlib_linalg] matrix property checks

  • #498 (WIP): [stdlib_math] add arg/argd/argpi

  • #494 (WIP): Add testing module to allow better structuring of test suites

  • #491 (WIP): Stdlib linked list

  • #488 (WIP): [stdlib_math] add is_close routines.

  • #478 (WIP): [stdlib_linalg] Add zeros, ones function.

  • #475 (WIP): Generating sorting subroutines specific to character type with fypp

  • #473 (WIP): Error stop improvements

  • #455 (WIP): stdlib_hash: waterhash algorithm

  • #452 (WIP): Implementation of a map data type

  • #445 (WIP): [stdlib_io] disp(display your data)

  • #437 (WIP): [FPM] add fpm support

  • #363 (WIP): Sorting string’s characters according to their ASCII values

  • #353 (进行中):实现一个用于实数宽松比较的模块的初始版本

  • #286 (WIP): Probability Distribution and Statistical Functions – Beta Distribution Module

  • #278 (WIP): Probability Distribution and Statistical Functions – Gamma Distribution Module

  • #276 (WIP): Probability Distribution and Statistical Functions – Exponential Distribution Module

  • #273 (WIP): Probability Distribution and Statistical Functions – Normal Distribution Module

  • #272 (WIP): Probability Distribution and Statistical Functions – Uniform Distribution Module

  • #189 (WIP): Initial implementation of COO / CSR sparse format

请通过测试和审查拉取请求帮助改进 stdlib ！

@MarDiehl 和 @arjenmarkus 在 该仓库。请尝试一下，如果有任何问题，或者 API 是否可以改进，请告诉我们它是如何工作的。

Fortran 包管理器#

Here’s what’s new in fpm:

  • Version 0.4.0: Alpha release update

  • #546: Update version for release 0.4.0

  • #548: Fix build on MacOS/ARM64

  • #527: Add objects for handling compiler and archiver

  • #536: Always call git init in fpm new when backfilling

  • #533: Allow extra section in package manifest

  • #528: Generate build/.gitignore

Work in progress#

  • #539 (WIP): Add parent packages into dependency tree

  • #521 (WIP): Expand tabs in source parsing

  • #506 (WIP): Initial implementation of implicit_none

  • #498 (WIP): Compiler flags profiles

fpm 仍处于早期开发阶段，我们需要尽可能多的帮助。以下是你今天可以提供的帮助：

  • 使用它，让我们知道你的想法！阅读 fpm 打包指南 了解如何使用 fpm 构建你的包，以及 清单参考 了解你可以在 fpm.toml 文件中指定的所有内容。

  • 在 fortran-lang 网站 上浏览现有的 fpm 包

  • 浏览 开启的 issues，看看你是否可以帮助实施任何修复或功能。

  • 为 fpm 调整 Fortran 包并将其提交到 Registry。

  • 改进文档。

fpm 的短期目标是使具有依赖关系的 Fortran 包的开发和安装更容易。其长期目标是构建一个丰富且分散的 Fortran 软件包生态系统，并创建一个健康的环境，在该环境中轻松创建和发布新的开源 Fortran 项目。

FFTPACK#

Zuo Zhihua (@zoziha) and Ondřej Čertík (@certik) started maintaining the public domain project FFTPACK under the Fortran-lang namespace. The project is readily available for usage in with fpm.

Here is what is new in FFTPACK:

  • #10：为四分之一波数据添加(i)qct/dcosqi/dcosqf/dcosqb接口。

  • #7: Add dzffti/dzfftf/dzfftb interfaces

  • #4: Improve fft interface for complex sequences: (i)fft/zffti/zfftf/zfftb

  • #6: Add (i)rfft/dffti/dfftf/dfftb interface and ready to move to fortran-lang

  • #5: Add fftshift/ifftshift

  • #3: Add CI: fpm.yml

Work in progress#

  • #11 (WIP): 添加 (i)dct/dcosti/dcost 接口。

Feedback and ideas for this project are welcome.

编译器#

Flang#

最近的开发更新：

  • New Driver and CMake integration:

    • The new driver has replaced the old, hence f18 has been deleted.

    • flang-new (aka. the new driver) now drives the flang bash script before an external compiler is called.

    • Code-generation work is ongoing.

    • Work is now proceeding to enable CMake to recognize the compiler and set the appropriate options for build configurations.

  • FIR（Fortran IR - MLIR 的一种方言）：

    • Fortran 95 lowering and runtime support is nearing completion, particularly of intrinsics

    • Code upstreaming will begin again in earnest once F95 is deemed complete

  • OpenMP

    • Nesting of region semantic checks

    • enter_data MLIR to LLVM IR lowering

    • Semantic checks for allocate directive

    • Lowering for various modifiers for the schedule clause

    • Pretty printer and parser for omp.target operation

    • Semantic checks for linear, nested barrier, allocate directive

    • Progress with firstprivate, critical, collapse, ordered, reduction

  • Lift -Werror checks into local functions

  • Document the flang wrapper script

  • Fix the extent calculation when upper bounds are less than lower bounds

  • Fix list-directed plural repeated null values at end of record

  • Fix build failure on MacOS involving std::clock_t

  • Fix error messages on Windows.

  • Disable Plugins in out-of-tree builds

  • Correct off-by-one error in SET_EXPONENT

Call notes are recorded and available upon request here. Please contact Alexis Perry-Holby at aperry@lanl.gov for document access.

LFortran#

LFortran 0.12.0 于 8 月 15 日发布#

Changes since the last release.

  • Fixed all issues in the parser that were reported (AST)

    • multiple loop single end do

    • arithmetic if

  • Comments and empty lines are now represented in AST and formatted correctly (AST)

  • The formatter (lfortran fmt) now uses the minimal amount of parentheses in expressions

  • Initial fixed-form parser (AST)

  • Initial class support (ASR, LLVM)

  • Allocate / deallocate, allocatable arrays (ASR, LLVM)

  • Associate block (ASR, LLVM)

  • Runtime library refactoring (ASR, LLVM)

    • Split into builtin, pure and impure

    • iso_fortran_env, iso_c_binding intrinsic modules added

  • Compile time evaluation (ASR, LLVM)

Commits (git shortlog -ns v0.11.0..v0.12.0):

   369  Ondřej Čertík
    85  Thirumalai Shaktivel
    79  Gagandeep Singh
    75  Rohit Goswami
    20  Andrew Best
     4  Dominic Poerio

Updates in master since the last release:#

  • LFortran 现在可以在 Windows 上编译二进制文件

  • C interoperation works on all platforms (including Windows and MSVC)

  • Runtime library improvements

    • Complex intrinsics fixed on all platforms

    • All trigonometric functions now use the Fortran impure interface in the runtime library

    • More intrinsics implemented

  • Initial implementation of classes and methods

  • LFortran now works with fpm and compiles the hello world project and a few other example projects

  • Parser improvements: team and sync statements

  • Improved handling of character types as function arguments and return values

We are looking for new contributors, so if you are interested, please get in touch with us! We would be happy to do a video call with you to get you started.

活动#

  • We had our 15th Fortran Monthly call on August 17. You can watch the recording below:

  • FortranCon 2021 will be held virtually from September 23-24, 2021. Registration is free of charge and is due by September 15. The second call for abstracts is due September 1. For more information, visit the FortranCon website.

  • Our Google Summer of Code program for 2021 is coming to a close. Read about our students and their progress so far on Discourse: https://fortran-lang.discourse.group/c/gsoc-2021/11

像往常一样，订阅 邮件列表 和/或加入 Discourse 继续关注未来的会议。

贡献者#

我们感谢过去一个月为 fortran-lang 做出贡献的每个人，他们在以下任何存储库中发表评论：

Fortran newsletter: August 2021   Fortran newsletter: October 2021

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