Odin Files

New Language Features

• Native support for UTF-16 strings: string16 and cstring16
• Mostly for interfacing with Windows code, and other foreign code
• Define Integer Division By Zero https://github.com/odin-lang/Odin/pull/5556

New Compiler Improvements

• @(init) and @(fini) must be proc "contextless" ()
• Implement intrinsics.objc_block @harold-b in https://github.com/odin-lang/Odin/pull/5547
• Implements the Apple block ABI.2010.3.16 natively
• Improve deference missing suggestion message
• Do not check for explicit allocators when determining proc in proc group by @janga-perlind in https://github.com/odin-lang/Odin/pull/5564
• Skip errors on polymorphic procs when in a proc group with other options
• Fix compiler segfault when trying to use proc at type level or trying to use () as a type

New Packages

*

Package Improvements

• Fixes to vendor:darwin/Metal
• Numerous minor fixes to base:runtime
• Improvements to base:runtime docs
• Fixes to vendor:wasm/WebGL bindings
• Cleanup in math/rand and runtime/random_generator
• Add missing xlib functions for getting and setting text properties
• vendor:OpenGL fix misnamed parameter by
• Make D3D12_FEATURE_DATA_D3D12_OPTIONS.MinPrecisionSupport a bitset
• Fix buddy allocator assert
• Check for EOF when scanning file tags
• Fix stride in memory_equal/compare_zero giving false positves
• Split SDL_ttf bindings to group with and without require_results
• Propogate #caller_location to core:container/queue procs
• Support using allocator resize in _reserve_soa
• Zero existing memory when using resize_soa
• Add add/remove_document_event_listener() to core:sys/wasm/js
• Fixed and added obj-c methods for NSWindow
• fix typo in CLSIDFromProgIDEx signature
• Fix broken wglUseFontBitmaps binding
• Add LPFN_GETACCEPTEXSOCKADDRS to ws2_32.odin
• Specify %m and %Mas verbs for integer formatting in core:fmt
• Add @(require_results) attribute to procs returning an allocator
• Handle allocator error when appending in read_entire_file_from_file
• vendor:box2d fix CreateMotorJoint procedure signature
• Add build tags to posix/spawn.odin

Full Changelog: https://github.com/odin-lang/Odin/compare/dev-2025-08...dev-2025-09