dev-2025-07

New Language Features

• Add intrinsics.type_is_bit_field
• Add @(no_sanitize_memory) with additions to base:sanitizer

New Compiler Improvements

• Correct spelling in odin doc -help output
• Let -test-all-packages work with -build-mode:test
• Fix package docs
• Fix swizzle in for in statement
• Fix divti3 not being exported
• Fix scope attribute proc grouping
• Forbid multiple uses of -sanitize
• -vet-style: Be strict with type switch case column alignment
• Let compound literal array be broadcast to a struct field of arrays
• Packages with .odin in the name no longer attempt to parse as odin files
• Let -no-entry-point work for Windows DLLs
• Guard against invalid proc types in parameter list
• Push context onto stack before evaluating procedure parameters
• Consider custom #align when determining union tag size
• Ensure volatile status for all atomic operations
• Fix WASM C ABI for raw unions
• Fix invalid selector for acceleration structure
• Fix check_shift
• Forbid nested declaration of instrumentation procedures
• Fix bug where compiler treated uint enums as ints
• Fix load type panic because front-end allows a deref of a type
• Added options to show, obfuscate, trim, and hide source code locations
• Various fixes

New Packages

• vendor/kb_text_shape

Package Improvements

• Add examples/all/sdl3 for all sdl3 dependant packages
• Rewrite Atomic_RW_Mutex
• Add overlapped I/O bindings for Windows
• Allow odin check examples/all for js_wasm target
• Guard against negative index in inject_at
• Print timings to stderr instead of stdout
• Change os2.user_* on Windows to use SHGetKnownFolderPath
• Add core:os/os2 user dirs helper to retrieve common paths like Downloads, Videos, et al
• Clarify strconv.append_* to strconv.write_*
• Remove old @(deprecated) things.
• DXC: Fixed broken bindings of ICompiler and ICompiler2
• Fix GMT+/- timezone handling
• Clarify core:flags variadic behaviors
• Move core:math/bìg tests over to core:testing instead of using Python3 as an oracle
• Add initial tests for big rationals
• Sync chan refactor
• Replace core:posix usage in core:os/os2
• compat allocator improvements
• Fix pool_join hangs if no threads are started
• Fix early join after start
• Expose getpeername in core:net package as peer_endpoint
• Let tests expect assertion failures and signals raised
• Get env buffer
• Allow core:net to be imported with -default-to-panic-allocator
• Update vendor:sdl3 from 3.2.10 to 3.2.16, and vendor:sdl3/image from 3.2.0 to 3.2.4
• More Buddy_Allocator safeguards
• Fix RegEx docs
• Added TIOCGWINSZ to darwin, linux and freebsd
• Escape object file paths properly during linker_stage
• Fix try_send and send
• Added IS_SUPPORTED to core:sys/posix
• Fix issue parsing vendor/stb/image with the core:odin/parser parser
• Fix memory leak in core:math/big.internal_rat_norm
• raylib: Refer to Odin-style enum over original C enum
• sys/linux: Unify IPC_Flags and IPC_Mode bit_sets
• testing: Make test state changes its own feature
• Add slice.suffix_length
• Various fixes

Full Changelog: dev-2025-06...dev-2025-07

dev-2025-06

New Language Features

New Compiler Improvements

• Improvements to building with Android
• Add more asan support to the odin runtime and sanitizing for various allocators
• Fix to compile-time and variable NaN comparisons
• Fix to syscalls on NetBSD ARM64
• Fix Darwin version reporting on older macOS versions
• General compiler bug fixes
• intrinsics.type_elem_type(simd_vector)
• Fix Global/Static Variable Alignment
• Fixes assigning null as a type if it's an alias but the base type is null
• @(no_sanitize_address)
• Support Objective-C class implementation
• Add debug info for labels to Odin
• intrinsics.type_integer_to_unsigned and intrinsics.type_integer_to_signed
• Use --sysroot instead of -Wl,-syslibroot on Darwin
• Fix global and static any usage
• Re-enable static map calls on AMD64 SysV due to ABI fixes
• Make odin help more precise
• -dynamic-literals
• Do not call disabled deferred procedures
• Add /usr/local/lib to FreeBSD linker path
• Add error with a suggestion when trying to extract an element from a #simd array, and prefer simd.extract
• Only trim .odin from build filename
• Keep shared libraries from calling main program's startup/cleanup procs on Linux
• Add -build-only, -keep-test-executable, delete test executable after running
• Enable all sanitizers on FreeBSD
• RAD Debugger support through custom .raddbg section
  • Default views for slices and matrices
• Error on unterminated multi-line comment
• Fix output of object names (#5241)
• Add suggestions for quaternionN or complexN conversions

New Packages

• base:sanitizer
• vendor:windows/XAudio2
• vendor:sdl3/ttf
• core:terminal
• core:encoding/ansi -> core:terminal/ansi

Package Improvements

• Vectorize base:runtime.memory_*
• core:net
  • Rework errors to be cross-platform
  • Replace default_tcp_options with a constant
• core:container/small_array: Improve documentation for
• core:sync/chan: Improve documentation
• core:mem/tlsf: refactor, add free_all support, add automatic new pools
• core:fmt: Fix printing for bit_set[Enum] when min(Enum) != 0
• vendor/glfw
  • fix SetMonitorCallback and MonitorProc type definition
  • use b32 where appropriate
• core:text/regex: Add iterator
• core:math: Fix math.nextafter skipping from 0 to 1
• vendor:wgpu:
  • Update to 25.0.2.1
  • Fix function name for wgpu.js genericGetAdapterInfo
  • Correct mipmpaFilter field name in wgpu.js
• core:time/timezone: preserve nanoseconds on calls
• vendor:box2d:
  • Update to 3.1.0
  • Add missing field in box2d.BodyDef
  • Make build_box2d.sh more flexible
• core:container/priority_queue
  • let it return runtime.Allocator_Error
  • Fix off-by-one error in remove
• core:sys/darwin/Foundation : Loads of additions and related stuff
• vendor:sdl2: correct RWwrite signature
• vendor:sdl3:
  • Fix count output parameter of GetFullscreenDisplayModes
  • Add Semaphore API
• core:encoding/*, fix parsing of CDATA tags
• core:time: add tick_add
• core:encoding/cbor, fix slice overflow
• core:os/os2: general improvements
• vendor:wasm/WebGL: Fix incorrect parameter types
• core:bufio: Fix typo from b.w-b.w to b.w-b.r
• core:simd/x86: BMI/BMI2 intrinsics
• base:intrinsics: alternate reduce_add/reduce_mul intrinsics
• core:strconv, add support for hex-floats (0h)
• vendor:raylib/rlgl add some missing functions
• vendor:directx/d3d12
  • add more FEATURE_DATA_OPTIONs
  • Fix RESOURCE_STATE_ALL_SHADER_RESOURCE flags and add new HEAP_TYPE
• core:encoding/json: when unmarshalling, only match on struct tags if present
• vendor/miniaudio: update to 0.11.22
• core:math/big: fix range check in int_atoi
• Add comments to builtin.odin, documenting ODIN_* constants
• vendor:windows/GameInput: fixes and tweaks
• core:encoding/csv: Fix incorrect CSV reader settings for example
• Vectorize strings.prefix_length

Full Changelog: dev-2025-04...dev-2025-06

dev-2025-04

New Language Features

New Compiler Improvements

• Support LLVM 20.1
• Fix Objective-C Selector and Class linking problems caused by a race condition
• VERY Rudimentary support for Android:
  • -subtarget:android for -target:linux_arm64
• Numerous js_wasm32 improvements
• Add ~{memory} clobber to syscalls intrinsics
• Improve or_else type inference logic
• Use Microsoft's "best practices" for using vswhere
• General Bug Fixes which caused compiler crashes

New Packages

Package Improvements

• Update vendor:sdl3 to 3.2.10
• core:crypto
  • General improvements
• core:os/os2/path.odin rewrite from scratch
  • Improved Documentation
  • Remove dependency on core:path/filepath

dev-2025-03

New Language Features

New Compiler Improvements

• Name Canonicalization
  • Deterministic Name Mangling Rules for Symbols (Procedures, Variables, Debug Types, etc)
• typeid layout change
  • Always 8-bytes in size
  • Represents a hash of the canonical name for the type
• Improved generation times for odin doc
• Allow -show-timings for odin doc
• Very minor parser improvements to catch weird edges cases
• intrinsics.simd_extract_msbs
• intrinsics.simd_extract_lsbs
• for x in bit_set will use a count leading zeros intrinsics internally rather than checking each bit manually
• General bug fixes for LLVM backend

New Packages

• vendor:sdl3/image

Package Improvements

• Update vendor:wgpu to v24
• Improved documentation for core:simd
• Minor fixes to SDL3 bindings
• Support use of * in format strings without an index
• NS.SavePanel_URL fix
• Support %b for rune
• os2 fixes
  • Recursive directory walker
  • Fix race conditions on Linux
  • os2.random_string to use context.random_generator

dev-2025-02

New Language Features

• Support #unroll(N) for with arrays

Compiler Improvements

• Enable -use-separate-module as default for all platforms (except wasm based ones)
• General Bug Fixes
• Remove erroneous warnings regarding stack overflow in range loops "by reference"
• Allow broadcasting of untyped values to #simd arrays
• Improvements to -obfuscate-source-code-locations
• Remove duplicates of .framework/.dynlib/.so in linker
• Darwin: Sort frameworks to link first

New Packages

• vendor:sdl3 (3.2.2)
• vendor:windows/GameInput

Package Improvements

• Improvements to D3D12 package
• Improvements for Haiku
• Add missing procedures to GLFW
• runtime.map_entry
• XInput bindings for core:sys/windows
• More work on core:os/os2 development
• More Objective-C bindings
• Additional bindings and constants for core:sys/windows
• mem.Tracking_Allocator defaults to panicking on bad frees

dev-2025-01

New Language Features

• #+feature dynamic-literals
  • All dynamic literals (maps and dynamic arrays) are disallowed by default to remove implicit allocations from Odin
  • If the user wants to allow this, it can be enabled on a per-file basis by adding the above "build tag"
  • Dynamic literals like the following:
    • [dynamic]int{1, 4, 9, 16}
    • map[string]int{"Apple" = 759, "Pear" = 128, "Gorilla" = 533}

Compiler Improvements

• ensure/ensure_contextless
  • Identical to assert/assert_contextless but is not removed with -disable-assert
• Remove viral #force_inline and #force_no_inline
  • Declaring a procedure with these tags would previously virally apply them to procedures called inside the subject procedure too, it now just affects the procedure it is applied to
• Fix bug with comparisons with big endian types
• Improve zeroing rules for resize_dynamic_array
• Add implicit broadcasting for #simd arrays
• map_entry (Docs)

New Packages

N/A

Package Improvements

• Fixes to vendor:raylib
  • Fixes to foreign imports after update to 5.5
  • Allow for custom WASM link libraries
• Allow custom WASM link libraries for vendor:box2d
• Add trunc to core:math/linalg/glsl
• Improvements to core:encoding/base32
• Update vendor:cgltf to 1.14
• Add xinput bindings to core:sys/windows
• Fix to matrix adjugate procedure

dev-2024-12

New Language Features

N/A

Compiler Improvements

• Fix windows args parser problem from issue #4393.
• Suggestion when assigning enum to bit_set.
• Suggest -microarch:native if popcnt instruction is missing.
• List the supported targets using odin build . -targets:?.
• Fix: build_odin.sh always runs demo regardless of argument.
• Report error when builtin min/max has only one numeric parameter.
• Add which to shell.nix to build with --pure.
• Only error with -vet-cast when it is actually castable.
• Fix #4508 for abs, min, max.
• Rework macos version retrieval for odin report.
• Updated NetBSD CI to pkgsrc Q3 release.
• Check type_expr in check_procedure_param_polymorphic_type.
• Add support for LLVM v19
• Fix PowerShell version incompatibility in build.bat by adding misc\get-date.c utility.

New Packages

N/A

Package Improvements

• Update vendor:raylib to v5.5.
• Add vendor:raylib aliases for Is*Ready -> Is*Valid.
• Add new test, better fail-check, and non-transitioning tz fix.
• Fix random sequence bindings in vendor:raylib.
• Added Unlinking Section to Posix Socket Binding Documentation.
• Update scanner.odin.
• Fix relative links in examples/README.md.
• Correct zlib usage in doc.
• Add core:slice.size.
• reflect: add enum_value_has_name proc.
• Increased the size of Javascript keyboard event key/code buffer size.
• Add NSApplication bindings for mainWindow and keyWindow.
• Add STICKYKEYS, TOGGLEKEYS, and FILTERKEYS to core:sys/windows.
• Implemented inotify in core:sys/linux.
• Fix integer type in UXTheme bindings.
• os2: fix leak in dir_windows, fix netbsd, and add a test for dir reading.
• [runtime] make(map[K]V) should not allocate any capacity.
• Fix typo in the Quaternion dot product implementation.
• Fix #config typo in Lua bindings.
• Parsing fix for timezones that have an uneven number of utc / st tags.
• Fix #4509
• Fix unhandled unmarshal error.
• Rework macos version retrieval for core:sys/info.
• core:net: Fix DNS_RECORD.Data alignment error on Windows i386.
• Fix math binomial proc giving wrong result.
• Make O_RDONLY default for os.open on all platforms.
• core:dynlib: Unload library before loading again & add LIBRARY_FILE_EXTENSION constant.
• Correct handling newlines between build tags in core:odin.
• Pass allocator to implicitly (de)allocating procs in core:log.
• Use a proper Queue in core:thread.Pool
• Fix core:text/regex's match_with_preallocated_capture returning num_groups.
• Add linalg.clamp_length(vector, max_length) -> clamped_vector.
• Improve strings.index_multi.
• Add regression test for #4553.
• core:encoding/json: Move struct field zipping outside of loop.

dev-2024-11

New Language Features

Compiler Improvements

• General bug fixes
• Fix 128-bit ABI issues caused by LLVM changes
• Fix #load_directory containing directories
• Add warning for unsigned >= 0 like conditions in a for loop

New Packages

• core:time/timezone

Package Improvements

• Numerous bug fixes
• core:sys/posix Linux Support
• Improvements to core:sys/darwin
• Add missing bindings to rlgl
• rand.choice_bit_set
• slice.to_type
• Improvements to js target APIs

dev-2024-10

New Language Features

• Replace //+ syntax with #+
  • Used in cases like #+build windows
• #min_field_align and #max_field_align
  • deprecate #field_align in favour of #min_field_align
  • #max_field_align used in places where #pragma pack was used in some C compilers
• #caller_expression

Compiler Improvements

• ABI BREAKING CHANGE: How SysV handles multiple return values
  • Matches the same behaviour as other platforms to pass multiple return values separately
• Fix ABI for 128-bit integers since the breaking changes in LLVM 18 for WASM and AMD64
• -vet-packages:<command-separated-string_array>
• -vet-unused-procedures
• Add -no-rpath
• Simplify #row_major and matrix_flatten behaviour
• Allow transmute(Bit_Set)~T(0)
• Move many of the vendor:wasm/js package to core:sys/wasm/js
  • Rename runtime.js to odin.js to be consistent

New Packages

Package Improvements

• General improvement to documentation across the core library
• core:sys/info: more CPU feature detection for RISC-V
• core:time time.time_to_datetime
• Add #any_int directive to built-in procedures that were missing it, to be consistent
• More Objective-C Runtime Bindings
• Improvements to core:container/bit_array
• Improvements to C vararg behaviour and definitions and va_list
• Improvements to atomic/sync/thread related operations
• Improvements to core:sync/chan

dev-2024-09

New Language Features

• Add support for linux_riscv64 and freestanding_riscv64

Compiler Improvements

• Support RISC-V for the compiler itself
• Fix crash if referencing import "aliased" in other file
• Added a hint at end of build.bat about release mode when building in debug mode
• Allow symlink test to work irrespective of git settings
• Use another BSD URL for pkgsrc on CI
• Fix type switching over internal pointer union
• Fix c_vararg bit_set
• Add table-driven (in)definite article to some errors.
• Fix alias handling of procedures
• riscv: add an error when atomics are used without the atomics extension
• Remove extra format item at end of context error message
• Fix inline transmutation of [16]i8 to i128
• Fix 'odin [run|test] --' giving a compiler out of bounds
• UL_COMPARE_AND_WAIT_SHARED is macOS 10.15+
• query brew for llvm-config location if possible

New Packages

• Add vendor:box2d
• Add core:text/regex

Package Improvements

• Add sdl2glue to vendor:wgpu package
• Fix os.read_dir with symlinks
• os.Error to replace os.Errno
• core:image/common.odin Fixes
• Prevent SIGPIPE on Darwin when writing to a closed core:net socket
• Add reflect.struct_field_count that returns the number of fields in a struct type
• Fix missing closing brace for Bit_Field in core:odin/parser
• Fix SIMD intrinsics wording
• Core sys windows rawinput code
• Port core:net to FreeBSD
• Allow testing for intentional leaks in test runner
• Various core:encoding/cbor fixes
• Various core:crypto improvements
• Vectorize index_byte
• Use intrinsics.reverse_bits in core:compress/zlib
• Fix type_info_union_is_pure_maybe only working with regular pointers
• Add support for field tags on bit_field fields to core:odin
• Loop os.write_entire_file to write more than MAX_RW
• [fmt] Add bit fields to the pointer printing logic
• Fix os.read_dir closing the given file descriptor
• Fix type hint propagation for shift
• Let memory failures be errors in the test runner
• Check if procedure parameter type declares polymorphic args
• vendor:x11: Added a few procedures for xrandr, xinput, and xFixes
• vendor:egl: Added a few more egl procedures and constants
• core:time WASI implementation
• core:sys/linux: Add binding to ioctl syscall + standard fd constants.
• Update mem doc example formatting
• Error if assigning to rodata variable with index
• Report error when a variadic procedure parameter has a default value
• core:sys/posix and core:os/os2 based on it (for darwin, netbsd, freebsd and openbsd)
• Fix error handling in os2.read_entire_file_from_file()
• add shm_open and shm_unlink syscalls for darwin
• More Foundation bindings.
• Add autogenerated orca bindings and macros from laytan
• os2 process linux implementation
• Improve benchmarks.
• Check if file open-mode is O_CREATE on Darwin before forcing chmod
• Fix open bindings
• Fix log unnecessary allocations
• (raygui) Restores vertical text alignment broken after 4.0 migration
• Implement lshrti3 on wasm
• Add core:math.count_digits_of_base
• Remove deprecated log procs from core:testing
• Fix SIMD var typo
• Fix wiki link in the README.md
• Add support for Linux on os/sys/posix termios.
• A couple of foundation binding. Vet tabs.
• core:sys/linux - implement clock_settime, clock_getres and clock_nanosleep
• os2: process API for Darwin and most of it for BSDs
• orca: implement core:time and core:log
• Fix ambiguous generic type names
• Added missing slice advancing.
• Fix binding: Make rl.LoadImageAnim take a pointer instead of a multi-pointer.
• Fix core:reflect/iterator.odin
• Fix binding to cmark_node_get_fence_info
• Fix win32 dwmapi DWMWINDOWATTRIBUTE enum.
• os2: propagate errors from execv
• Free the arenas allocated in test_core_runtime
• Fix use-after-free in thread.Pool
• Fix error for uuid to require 36 bytes instead 32 (4 bytes for dashes)
• Fix -vet and -strict-style failures in tests
• [os2/process]: Don't free process info fields in partial success scenarios
• Add API for freeing thread_local state
• wgpu: update to v22.1.0.1
• Delay lexical checking for foreign blocks that are in file scope
• -vet -strict-style -disallow-do in tests
• Win32 clipboard procedures
• os2: disable custom heap allocator
• mem/virtual: use sysconf for retrieving page size and actually use these init procs
• mem/virtual: make sure the given size is used for subsequent blocks
• Add missing lexer checking delay for foreign blocks
• Add core:io test suite
• Add a file tag parser to core:odin/parser
• Fix some issues with the "bad import name" errors
• Add math.remap_clamped, which clamps the result in range [new_min, new_max]