#!/bin/sh
set -eu

fixture_directory=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
workspace_directory=$(CDPATH= cd -- "$fixture_directory/../.." && pwd)
cache_directory=$workspace_directory/.tmp/exec-from-filesystem-zig-cache
output=$fixture_directory/exec-from-filesystem.aarch64.elf
zig_version=$(zig version)

if [ "$zig_version" != "0.16.0" ]; then
    echo "exec-from-filesystem requires Zig 0.16.0; found $zig_version" >&2
    exit 1
fi

mkdir -p "$cache_directory/local" "$cache_directory/global"
env \
    ZIG_LOCAL_CACHE_DIR="$cache_directory/local" \
    ZIG_GLOBAL_CACHE_DIR="$cache_directory/global" \
    zig cc \
    -target aarch64-linux-musl \
    -nostdlib \
    -static \
    -g0 \
    -s \
    -Wl,--build-id=none \
    -Wl,-e,_start \
    "$fixture_directory/launcher.S" \
    -o "$output"
chmod 0644 "$output"