OCaml Weekly News

Hi there!

I am excited to announce the release of the intel_hex library. This library is a manipulation library that provides functions for reading, writing, and creating Intel HEX data, which is a common format used in embedded system programming.

Intel_hex.Record.
  [
      Extended_segment_address 0x0F;
      Data (0x0000, "Hello ");
      Data (0x0007, "World!");
      End_of_file;
  ]
|> Intel_hex.records_to_string 
|> print_endline

:02000002000FED
:0600000048656C6C6F20E6
:06000700576F726C6421CA
:00000001FF

Also, you can of course read the IHEX object file from other sources:

In_channel.with_open_text "data.hex" Intel_hex.object_of_channel

- : Intel_hex.Object.t = 
{ 
  start_linear_address = 0;
  start_segment_address = {cs = 0; ip = 0};
  chunks = [(240, "Hello "); (247, "World!")]
}

Limitations

32-bitness. To represent 32-bit integers, the library uses the OCaml int data type. This may be problematic for 32-bit systems, as it can lead to overflow errors, but it works fine for most 64-bit systems.

Start addressing and extending addressing. Not fully supported for real-world use. I would appreciate your pull request on this!

Hello all! Been working on layoutz, a tiny, zero-dep combinator lib for making pretty, structured, terminal output: tables, trees, boxes, ANSI styled elements, etc.

Would love to hear how the API feels: Smooth? Any missing primitives you'd expect? Many thanks!

I have introduced a printing bug in the Rocq back-end, reported by Xavier Leroy. I am releasing version 20260203 today to fix this bug.

Hi everyone !

We are excited to officially invite you to the first Caml in the Capital meetup! We have two fantastic talks planned, some free pizza 🍕 generously sponsored by the OCaml Software Foundation 🐪 and great company to chat with :grinning_face_with_smiling_eyes:

• Registration link: HERE (Please register asap so we can anticipate)
• Date: Thursday February 26th from 6:30pm to 8:30pm
• Location: Imperial College London, Flowers Building, Room FLOW G.47A.

Hello! For those interested, here is the link to the video of the talk @pitag and I gave on the subject at Lambda World last year! Don't hesitate to ask questions here or under the video!

Here are links from many OCaml blogs aggregated at the ocaml.org blog.

• Windows Docker Images
• Weeknotes for week 6
• More CFI and frame pointers work
• OCaml Roundup: January 2026