#!/bin/bash
# The PIC32MZ bare-metal fixture (the EC and the EF), built with LLVM as
# ../baremetal is: a whole-chip ELF with its own reset code and configuration words.
#   build.sh <out dir>
set -euo pipefail
D=$(cd "$(dirname "$0")" && pwd)
O=${1:-$D/out}
mkdir -p "$O"
CC=/opt/homebrew/opt/llvm/bin/clang
LD=/opt/homebrew/bin/ld.lld
FLAGS="--target=mipsel-none-elf -march=mips32r2 -mabi=32 -mno-abicalls -fno-pic -G0 -msoft-float -O2 -ffreestanding -fno-builtin -Wall -Werror"
$CC $FLAGS -c "$D/start.S" -o "$O/mz-start.o"
$CC $FLAGS -c "$D/main.c" -o "$O/mz-main.o"
$LD -T "$D/link.ld" -nostdlib --no-pie -z max-page-size=16 "$O/mz-start.o" "$O/mz-main.o" -o "$O/pic32-mz.elf"
/opt/homebrew/opt/llvm/bin/llvm-objdump -h "$O/pic32-mz.elf" | grep -E "reset|config|vectors|text|data|bss"
shasum -a 256 "$O/pic32-mz.elf"