stage1: update zig1.wasm

std: disable `sha3-512 single` test on RISC-V with V support

test: disable some varargs behavior tests on RISC-V due to LLVM 21 regression

test: use -Wno-unterminated-string-initialization for cbe tests

test: re-enable a bunch of vector behavior tests on hexagon

test: use long calls for hexagon-linux module tests

test: expand C ABI test coverage to hexagon-linux-musl

std.posix.test: fix mmap() test to use actual page size instead of 4096

std.hash.xxhash: disable xxhash3 test on all mips64 targets

std: skip some failing tests on hexagon

std.Thread: make unreachable errors in sleep() clearer

Revert "llvm: workaround crashes in llvm loop optimizations"

compiler: remove medium code model workaround for loongarch64

llvm: switch to native f16 IR type for all hexagon targets

llvm: remove f16 special case for soft float aarch64

llvm: switch to native f128 IR type for nvptx

llvm: switch to native f16 IR type for s390x

compiler-rt: use native f16 type for loongarch

compiler-rt: move strlen from libzigc to here

musl: replace .data.rel.ro with .section .data.rel.ro,"aw"

llvm: update data layout strings for LLVM 21

zig cc: pass -mthumb to the assembler as necessary

zig cc: pass CPU features to Clang using the new -Xclangas when assembling

zig cc: update options data to LLVM 21

std.zig.system: update aarch64 and powerpc cpu detection for LLVM 21

std.Target: fix alignment for int/long types on m68k

std.Target: add managarm OS tag

std.Target: make ultrasparc3 the baseline for sparc64-solaris

std.Target.x86: purge avx10.n-256, rename avx10.n_512 to avx10.n, require evex512 for avx512f

std.Target: bump feature bit count from 288 to 317

std.Target: update CPU features to LLVM 21

update_cpu_features: bump branch quota for amdgcn

update_cpu_features: fix a fmtId call to be fmtIdPU

compiler: respond to API changes in LLVM 21

libtsan: update to LLVM 21

libunwind: update to LLVM 21

llvm-libc: update to LLVM 21

libcxx: update to LLVM 21

libcxxabi: update to LLVM 21

zig cc: update intrinsic headers to LLVM 21

zig cc: update driver files to LLVM 21

build: update to LLVM 21

std.Io: delete CountingReader

Merge pull request #25036 from ziglang/GenericWriter

LLVM backend:fix align 1 sret parameter load returned

ci: update to QEMU 10.1.0

Merge pull request #25045 from kada49/libc/common-impl-ceil

process.totalSystemMemory: Avoid overflow on Linux when totalram is a 32-bit usize

Reader.appendRemaining: Take ownership of the full allocated slice

AstGen: forward result type through unary float builtins

std.debug: remove `@frameAddress()` "UAF"

std.os.uefi: fix type error at MemoryType.format()

std.os.linux: powerpc syscalls clobber ctr and xer

x86_64: fix multiplication overflow detection with adx

delete some vestigal dead code

Merge pull request #25034 from ziglang/lzma

Fix TLS 1.2 client key exchange to use negotiated named group (#25007)

std.c: add correct SOMAXCONN for BSDs

libc: use zig isnan and derivates for mingw

Remove memcmp and memset from bundled musl and wasi

std.Build.WebServer: fix race

std.Build.Step.Compile: fix race condition in args file creation

`std.ArrayList`: add `insertSliceAssumeCapacity()` and `insertSliceBounded()` (#24978)

std.Target: add vita os

std.Build.Step.TranslateC: forward --cache-dir and --global-cache-dir flags

zig cc: don't pass -mcmodel for assembly files

add macOS handling for totalSystemMemory (#24903)

os.linux: faccessat wrapper prefer to faccessat syscall when flags is zero.

Adds non allocating alternatives to ZON parse functions (#22916)

Fix #24999: copy left-overs before we XOR into c. (#25001)

Merge pull request #24995 from alexrp/ubsan-rt-hidden

start adding big endian RISC-V support

delete std.debug.FixedBufferReader

std.zig.system: fix check for sparc "v8+" in getExternalExecutor()

Add `test-obj` to the help message

lib: Reword documentation for realloc to clarify size

fix: fix typo in comment by removing repeated 'business' word

Update powi.zig to fix docstring formatting

Merge pull request #24960 from ziglang/MemoryAccessor

std.fs.Dir: fix updateFile() to flush the file before updating its times

Merge pull request #24926 from mrjbq7/http-fetch

chore(std.Target): explicitly set baseline only to `arm` with 3ds

test(llvm_targets): remove unused thumb-3ds

chore(std.Target): document the 3ds version range

feat(std.Target): add 3ds os

std: remove lossy int to float coercion on json parse

langref: update nav link

Merge pull request #24921 from Justus2308/messy-mach

zig reduce: adapt to new Writer API

langref: sync with zig-spec grammar.peg

drop NameTooLong from sysctlbynameZ error set (#24909)

std.os.uefi: Fix typo that causes compile time error #22809"

Add mlock syscalls to std.c and std.posix

Use readStreaming, not readPositional, for streaming file readVec on Windows

wasi-libc: update to c89896107d7b57aef69dcadede47409ee4f702ee

expose darwin.PT in std.c

Fix bugs in Windows readVec implementations

std.Io.Writer: fix upper case hex float formatting

never advance seek position in `std.Io.Reader.peekDelimiterExclusive` (#24899)

update .mailmap