#!/bin/sh

# SPDX-FileCopyrightText: 2025 Laurent Huberdeau
#
# SPDX-License-Identifier: GPL-3.0-or-later

set -ex

# Variables
M2LIB="../../../M2-Planet/M2libc/"
PNUT_BRANCH="laurent-small-fixes-for-TCC"
PNUT_DIR="pnut-${PNUT_BRANCH}"

# Check tarball checksums
checksum-transcriber sources
sha256sum -c sources.SHA256SUM

# Unpack
mkdir build
cd build
# ungz --file ${DISTFILES}/${PNUT_PKG}.tar.gz --output ${PNUT_PKG}.tar
untar --file ${DISTFILES}/${PNUT_PKG}.tar

M2-Planet                       \
    --architecture x86          \
    --debug                     \
    --expand-includes           \
    -I ${M2LIB}                 \
    --file ${PNUT_DIR}/pnut.c   \
    -D target_i386_linux=1      \
    -D NO_TERNARY_SUPPORT=1     \
    -D ONE_PASS_GENERATOR=1     \
    -D SMALL_HEAP=1             \
    -o pnut-exe.M1

# Generate basic DWARF debug info (optional)
blood-elf                   \
    --file pnut-exe.M1      \
    --little-endian         \
    --entry _start          \
    --output pnut-exe-footer.M1

# Compile to hex2 (for debug: -f pnut-footer.M1)
M1                                      \
    --file ${M2LIB}/x86/x86_defs.M1     \
    --file ${M2LIB}/x86/libc-full.M1    \
    --file pnut-exe.M1                  \
    --file pnut-exe-footer.M1           \
    --architecture x86                  \
    --little-endian                     \
    --output pnut-exe.hex2

# Assemble
mkdir -p bin

hex2                                        \
    --architecture x86                      \
    --little-endian                         \
    --file ${M2LIB}/x86/ELF-x86-debug.hex2  \
    --file pnut-exe.hex2                    \
    --base-address 0x8048000                \
    --output bin/pnut-exe

# Recompile pnut with itself, this time
./bin/pnut-exe                              \
    -D target_i386_linux=1                  \
    -D ONE_PASS_GENERATOR=1                 \
    -D BOOTSTRAP_TCC=1                      \
    ${PNUT_DIR}/pnut.c                      \
    -o bin/pnut-exe-for-tcc

# Install pnut-exe
cp bin/pnut-exe-for-tcc ${BINDIR}/pnut
chmod 755 ${BINDIR}/pnut