odin-lang/Odin dev-2025-12

on GitHub

Breaking changes

• BREAKING: Use chacha8rand as the default RNG.

The old default generator is available under core:math/rand in rand_pcg.odin in case you require a seed to return the same sequence as before.

New Language Features

• Introduce #all_or_none for structs, which requires that struct literals have all or none of the fields set

New Compiler Improvements

• Use SIP hash as name canonicalization hash
• Moved checking of -vet-unused-procedures and -vet-packages flags to after all flags are parsed
• Fixes for 32 bit with regards to typeid
• Fix #5894
• Remove #no_copy
• Don't check proc signature similarity for imported Objective-C methods
• Ubuntu arm ci and posix fixes
• Fix allocation of anonymous globals
• Fix #5967: Incorrect stack overflow warning for by ref switches over unions
• Skip collision panic when package names aren't unique

New Packages

• Add vendor:curl

Package Improvements

• Improve docs for stable sort procedures
• Fix: linalg.quaternion_from_forward_and_up
• Clone unquoted strings in encoding/json
• Add missing SetLayeredWindowAttributes
• Add io uring API
• Add FreeLibraryAndExitThread in kernel32. Add EnumProcessModules in psapi
• Fix typo in NS.String_initWithCString
• Remove the Darwin-specific paths from thread_unix
• Fix thread_act_t size
• Fix: make choice_bit_set respect bit_set domain
• math/rand: Add range-based number generation procedures
• Fix is_pointer_internally not handling Named Types
• Faster big.itoa
• Add Xoshiro256 RNG
• Add LockFileEx/UnlockFileEx and related flags
• Fix vendor:stb/image resize alpha_channel parameter type to c.int
• Move some OS General_Error values to io.Error
• Fix out of bounds access when parsing end_pos
• Add WSASendTo and WSARecvFrom
• Update d3d12 bindings for D3D12_FEATURE_D3D12_TIGHT_ALIGNMENT
• Add NSWindow coordinate space conversion bindings
• Don't build log allocator file on freestanding targets
• Adjust docs links for satellite SDL libraries
• Increase base64 decoding table size to 256, preventing out of bounds reads
• vendor/xlib: a few more IM-related procedures and constants
• add math.sign and math.sign_bit overloads for int types
• Implement more Linux syscalls
• Add SIO_UDP_CONNRESET winsock constant
• os2.File_Stream

Other

• Fix up macOS CI

Full Changelog: dev-2025-11...dev-2025-12