#!/usr/bin/env bash
# Build the entire W65816 runtime — assemble *.s, compile *.c.
# Run after editing anything under runtime/src/.

set -euo pipefail
PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
LLVM_MC="$PROJECT_ROOT/tools/llvm-mos-build/bin/llvm-mc"
CLANG="$PROJECT_ROOT/tools/llvm-mos-build/bin/clang"

[ -x "$LLVM_MC" ] || { echo "llvm-mc not found at $LLVM_MC" >&2; exit 1; }
[ -x "$CLANG" ]   || { echo "clang not found at $CLANG" >&2; exit 1; }

SRC="$PROJECT_ROOT/runtime/src"
OUT="$PROJECT_ROOT/runtime"

asm() {
    local s="$1"
    local o="$OUT/$(basename "${s%.s}").o"
    echo "  AS  $(basename "$s")"
    "$LLVM_MC" -arch=w65816 -filetype=obj "$s" -o "$o"
}

cc() {
    local c="$1"
    local o="$OUT/$(basename "${c%.c}").o"
    local extra=("${@:2}")
    echo "  CC  $(basename "$c")"
    "$CLANG" -target w65816 -O2 -ffunction-sections \
        "${extra[@]}" \
        -I"$PROJECT_ROOT/runtime/include" \
        -c "$c" -o "$o"
}

asm "$SRC/crt0.s"
asm "$SRC/libgcc.s"
cc  "$SRC/libc.c"
cc  "$SRC/strtol.c"
cc  "$SRC/snprintf.c"
cc  "$SRC/qsort.c"
cc  "$SRC/extras.c"
cc  "$SRC/strtok.c"
cc  "$SRC/math.c"
cc  "$SRC/softFloat.c"
# softDouble.c needs -regalloc=fast: __muldf3's 64x64 -> 128 mul +
# inlined alignment shifts overflows the greedy allocator on the
# single-A target.
cc  "$SRC/softDouble.c" -mllvm -regalloc=fast

echo "runtime built: $(ls -1 "$OUT"/*.o | wc -l) objects"