chore: upgrade Zig 0.15 → 0.16#89
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Migrate the entire codebase to Zig 0.16.0. Key changes:
- std.Thread.Futex removed → custom NativeFutex using OS syscalls (__ulock on macOS, futex(2) on Linux)
- std.time.Timer removed → MonotonicTimer using clock_gettime(MONOTONIC)
- std.time.nanoTimestamp removed → clock_gettime-based replacement
- std.fs.cwd() → std.Io.Dir.cwd() with io parameter threading
- File operations (openFile, createFile, close, stat, writeAll, readAll) now require io parameter
- std.heap.GeneralPurposeAllocator removed → main() accepts std.process.Init
- std.posix.getenv removed → std.c.getenv
- std.fmt.FormatOptions → std.fmt.Options
- std.fmt.format(writer, ...) → writer.print(...)
- std.io.fixedBufferStream removed → SliceReader utility + std.Io.Writer.fixed
- ArrayListUnmanaged .{} init → .empty (Zig 0.16 requires explicit fields)
- ArrayListUnmanaged .writer(allocator) → std.Io.Writer.Allocating pattern
- reader.readNoEof → reader.readSliceAll
- Build.Step.Compile.addLibraryPath → root_module.addLibraryPath
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Replace std.c.clock_gettime and std.c.getenv (which require libc) with Zig-native alternatives that work on Linux without libc: - Timer: use std.Io.Timestamp.now(io, .boot) via global_single_threaded - Getenv: scan process environ block from Threaded global (no libc) This fixes CI failures on Linux where libc is not linked by default. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Replace ad-hoc workarounds from the 0.15→0.16 migration with proper std.Io usage: - Consolidate 6 duplicate MonotonicTimer copies into a single io-accepting definition in zolt-pool/timer.zig - Replace custom SliceReader with std.Io.Reader.fixed(); use concrete *std.Io.Writer / *std.Io.Reader in serialization signatures - Thread io: std.Io from main(init) through prove/verify/run commands, ELFLoader, and DoryCommitmentScheme SRS functions - Replace 70-line NativeFutex (raw __ulock/futex syscalls) with std.Io.futexWake / futexWaitUncancelable / futexWaitTimeout - Remove duplicate nativeGetenv from jolt_device.zig Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Use Io.Limit's .limited(n) constructor and ArrayListUnmanaged's .empty initializer to match the rest of the 0.16 migration. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
std.Iointerface, stdlib renames, and language changesKey migrations
std.Thread.FutexNativeFutex(OS syscalls)std.time.TimerMonotonicTimer(clock_gettime)std.fs.cwd().openFile(path, .{})std.Io.Dir.cwd().openFile(io, path, .{})std.heap.GeneralPurposeAllocatorstd.process.Init(main receives allocator)std.posix.getenv()std.c.getenv()std.fmt.FormatOptionsstd.fmt.OptionsArrayListUnmanaged(T){}ArrayListUnmanaged(T).emptybuf.writer(allocator)std.Io.Writer.Allocatingpatternfile.writeAll(data)file.writeStreamingAll(io, data)reader.readNoEof(buf)reader.readSliceAll(buf)/SliceReaderAdded utilities
MonotonicTimerindebug.zig— cross-platform monotonic timer usingclock_gettimeNativeFutexinthread_pool.zig— direct OS futex calls (macOS__ulock/ Linuxfutex(2))SliceReaderinutils/mod.zig— byte-slice reader withreadInt/readByte/readAllfor deserialization codeTest plan
zig buildcompiles cleanly (all targets)zig build testpasses (all unit tests)zig build fmtclean🤖 Generated with Claude Code