build.sh

1#!/bin/sh2# Builds one Koh release binary into build/releases/koh-<target>.3#4#   KOH_TARGET=linux-x86_64 sh build.sh5#6# `koh build` sets KOH_TARGET for each platform in koh.build; run by hand, the7# target defaults to the machine running the script. Runs on macOS and Linux.8#9# macOS targets need macOS: they link against the Apple SDK and are ad-hoc10# signed with codesign. Linux targets are static musl binaries cross-compiled11# with `zig cc`, so they build the same from either host, and NixOS's gcc12# wrapper and missing tcc never come into it.13set -eu1415die() {16  echo "build.sh: $*" >&217  exit 118}1920# Paths below are relative to the repository, wherever the script is run from.21cd "$(dirname "$0")"2223# The pin is the only compiler Koh is verified against; see AGENTS.md.24command -v v >/dev/null 2>&1 || die 'V is not on PATH; install V 0.5.2 b9a2d87 (see AGENTS.md)'25[ "$(v version)" = 'V 0.5.2 b9a2d87' ] || die "Koh requires V 0.5.2 b9a2d87, found: $(v version)"2627host_target() {28  case "$(uname -s)" in29    Darwin) os=macos ;;30    Linux) os=linux ;;31    *) die "unsupported host OS: $(uname -s)" ;;32  esac33  case "$(uname -m)" in34    arm64|aarch64) cpu=aarch64 ;;35    x86_64|amd64) cpu=x86_64 ;;36    *) die "unsupported host CPU: $(uname -m)" ;;37  esac38  echo "$os-$cpu"39}4041target=${KOH_TARGET:-$(host_target)}42out="build/releases/koh-$target"43mkdir -p build/releases4445case "$target" in46  macos-aarch64|macos-x86_64)47    [ "$(uname -s)" = Darwin ] || die "$target needs the Apple SDK; build it on macOS"48    case "$target" in49      macos-aarch64) arch=arm64; cpu=arm64 ;;50      *) arch=x64; cpu=x86_64 ;;51    esac52    v -prod -d use_bundled_libgc -arch "$arch" \53      -cflags "-arch $cpu -mmacosx-version-min=11.0" -o "$out" src/koh.v54    # Apple Silicon refuses to run an unsigned binary.55    codesign -f -s - "$out"56    ;;57  linux-aarch64|linux-x86_64)58    command -v zig >/dev/null 2>&1 || die 'Linux builds need Zig on PATH (zig cc provides the musl toolchain)'59    case "$target" in60      linux-aarch64) arch=arm64; triple=aarch64-linux-musl ;;61      *) arch=x64; triple=x86_64-linux-musl ;;62    esac63    # V's -cc takes a single program, not `zig cc -target …`, so wrap it.64    # V drops the GC for any cross target, which is how every Linux release65    # has shipped; -gc none pins that on a Linux host too, where V would66    # otherwise link libgc against musl and fail on glibc's getcontext.67    compiler="$PWD/build/cc-$target"68    printf '#!/bin/sh\nexec zig cc -target %s "$@"\n' "$triple" > "$compiler"69    chmod 755 "$compiler"70    v -prod -gc none -os linux -arch "$arch" -musl -cc "$compiler" \71      -ldflags "-s" -o "$out" src/koh.v72    ;;73  *) die "unsupported release target: $target (want macos-aarch64, macos-x86_64, linux-x86_64 or linux-aarch64)" ;;74esac7576echo "built $out"