LFortran@lfortranorg

Modern interactive LLVM-based Fortran compiler. Follow this account for the latest updates about LFortran.

lfortran.org/
Joined June 2020
24 Photos and videos
LFortran now works in WebAssembly. Here is a very alpha-version demo that runs in your browser and it is *fast*: dev.lfortran.org/ It still has many bugs, which you can report here if they are not already reported: github.com/lfortran/lcompile… github.com/lfortran/lfortran…
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The Oregon Trail in the browser – FORTRAN 77 to WebAssembly with LFortran, by @minhqdao .
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fortran-lang.discourse.group…

The Oregon Trail in the browser – FORTRAN 77 to WebAssembly with LFortran

I compiled the 1978 edition of The Oregon Trail — ~1,000 lines of fixed-form FORTRAN 77 — to WebAssembly with LFortran, and it’s playable in your browser, even on your phone. Source code is here.

fortran-lang.discourse.group
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LFortran is at the front page of Hacker News right now: news.ycombinator.com/item?id…
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We've come a long way. Now we are just compiling as many codes as we can until we can expect LFortran to just work; after that we will work on performance. Then we will announce beta quality.
LFortran@lfortranorg
Feb 25
LFortran can now compile the Fortran Package Manager (fpm): lfortran.org/blog/2026/02/lf…. Big milestone for us!
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LFortran can now compile the Fortran Package Manager (fpm): lfortran.org/blog/2026/02/lf…. Big milestone for us!

LFortran compiles fpm

LFortran can now compile fpm, the Fortran Package Manager. We opened up an issue for it in April 2025, when we started focusing on it as a priority. We closed it on February 7, 2026. fpm is the most …

lfortran.org
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As any respectable Fortran compiler must do, LFortran now compiles LAPACK, probably the most famous Fortran library. All tests pass, single/double precision, real/complex, 32-bit/64-bit integers. lfortran.org/blog/2026/02/lf…

LFortran compiles LAPACK

Every respectable Fortran compiler must be able to compile LAPACK, probably the most famous and influential Fortran library. Christopher Albert spent most of December 2025 to get it working, it took …

lfortran.org
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LFortran retweeted
JC Loiseau@loiseau_jc
11 Sep 2025
Replying to @cfdlab
Yep, using the LFortran compiler (@lfortranorg) allows some interactivity with Jupyter but it ain't feature-complete obviously. They're making an awesome work though. As for plotting, you can find a list of tools following this link: tinyurl.com/mprs2txr

Tools for plotting from Fortran

I added a plotting section, copied below, to my list of Fortran Tools. If you know of others please reply here or message me. accis: plotting and graphics library by Ian Hutchinson. Related project:...

fortran-lang.discourse.group
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Just created a guide and test suite for setting up a C & #Fortran dev environment on Windows, covering MSVC, MinGW (MSYS2), and Intel oneAPI. Hope this helps others! Feedback welcome! @fortrantip @lfortranorg @fortranlang github.com/Foadsf/win-multi-…

GitHub - Foadsf/win-multi-compiler-setup: A sample repository and guide for setting up a multi-co...

A sample repository and guide for setting up a multi-compiler (MSVC, MinGW, Intel) C/Fortran environment on Windows. - Foadsf/win-multi-compiler-setup

github.com
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The BerkeleyLab/assert library now supports LFortran! github.com/BerkeleyLab/asser…

Release Simplify macros, support LFortran, and expand testing · BerkeleyLab/assert

Breaking changes: This release removes the assert subroutine's diagnostic_data argument and related features and documentation, including The characterizable_t and intrinsic_t derived types a...

github.com
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LFortran compiles POT3D, a solar coronal magnetic field solver. It uses MPI and `do concurrent` and runs in parallel correctly. lfortran.org/blog/2025/03/lf…

LFortran compiles POT3D

We are thrilled to announce that LFortran can now successfully compile and run predsci/POT3D, marking a significant milestone in our journey to beta. POT3D is the ninth production-grade, third-party …

lfortran.org
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Congrats to Flang on the big milestone: blog.llvm.org/posts/2025-03-…. Thanks for mentioning LFortran and fortran-lang.org (@fortranlang) as well.

LLVM Fortran Levels Up: Goodbye flang-new, Hello flang!

LLVM has included a Fortran compiler “Flang” since LLVM 11 in late 2020. However, until recently the Flang binary was not flang (like clang) but instead flang-new. LLVM 20 ends the era of flang-new.

blog.llvm.org
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LFortran compiles Prima lfortran.org/blog/2025/03/lf…

LFortran compiles PRIMA

We’re thrilled to share that LFortran can now successfully compile and execute libprima/PRIMA. PRIMA marks the eighth production-grade, third-party code that LFortran has compiled with …

lfortran.org
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LFortran has just reached 1,000 stars on GitHub
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github.com/lfortran/lfortran

GitHub - lfortran/lfortran: Official main repository for LFortran

Official main repository for LFortran. Contribute to lfortran/lfortran development by creating an account on GitHub.

github.com
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LFortran is now in the Compiler Explorer (@CompileExplore), big thanks to @sh0ck_thi and @mattgodbolt. Please report all bugs. Here is a sample link: godbolt.org/z/M8j5P39M4

Compiler Explorer - Fortran (LFortran 0.42.0)

program expr2 implicit none integer :: x x = (2+3)*5 print *, x end program

godbolt.org
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We are steadily moving towards beta quality. I am very happy with the progress. The intrinsics are very fast, no runtime overhead, see the blog post for all details.
LFortran@lfortranorg
14 Nov 2024
LFortran supports all intrinsic functions. Great job by @HarshitaK1107 , Parth, @Pranavchiku and the rest of the team! lfortran.org/blog/2024/11/lf…
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LFortran retweeted
Assem@assemmedhat_
14 Nov 2024
Great work guys✨. The amount of effort put in here is fascinating.
LFortran@lfortranorg
14 Nov 2024
LFortran supports all intrinsic functions. Great job by @HarshitaK1107 , Parth, @Pranavchiku and the rest of the team! lfortran.org/blog/2024/11/lf…
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LFortran supports all intrinsic functions. Great job by @HarshitaK1107 , Parth, @Pranavchiku and the rest of the team! lfortran.org/blog/2024/11/lf…

LFortran supports all intrinsic functions

We are thrilled to announce that LFortran supports all intrinsic functions listed in F2018 Interpretation Document (Table 16.1 Pg: 332) (also shown by this nice list online at GFortran’s …

lfortran.org
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LFortran retweeted
Assem@assemmedhat_
27 Aug 2024
احب اشارك الشغل اللي كنت بعمله بقالي فتره ف البروجكت الواعد ده. دلوقتي كومبيلر LFortran بقا يقدر يcompile واحده من اتقل الاكواد اللي بتعمل array maniuplation. كان في تحديات كتير واتعلمت كتير من زمايلي ف التيم ومن التيم ليدر. وان شاء الله نكبر رقعه الاكواد المدعومه اكتر.🎉🎉💪
LFortran@lfortranorg
27 Aug 2024
LFortran now compiles SNAP and runs it correctly, our most complicated code yet. lfortran.org/blog/2024/08/lf…
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This is a huge milestone both for LFortran as well as for me personally. When I worked at @LosAlamosNatLab, SNAP was one of the codes they asked me if we could compile. And now we can! One Fortran code after another we will eventually compile them all. Join us on this journey!
LFortran@lfortranorg
27 Aug 2024
LFortran now compiles SNAP and runs it correctly, our most complicated code yet. lfortran.org/blog/2024/08/lf…
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