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#!/usr/bin/env sh
# MIT License, Copyright (c) 2021 Marvin Borner
set -e
cd "$(dirname "$0")"
MAKE=make
NPROC=nproc
SUDO=sudo
TAGS=ctags
mode="${1}"
no_ask="${2}"
build_cross() {
if [ ! -d "./cross/" ]; then
if [ "$no_ask" != "-y" ]; then
echo -n "Do you want to compile a cross compiler (this can take around 20 minutes)? [yn] "
read -r answer
if ! [ "$answer" != "${answer#[Yy]}" ]; then
echo "The compilation of melvix requires a cross compiler!"
exit 1
fi
fi
# Create directory
mkdir -p cross
cd cross
DIR=$(pwd)
# Get sources
mkdir "${DIR}/src" && cd "${DIR}/src"
echo "Downloading..."
curl "https://ftp.gnu.org/gnu/binutils/binutils-2.36.1.tar.gz" >binutils.tar.gz
tar xzf binutils.tar.gz
curl "https://ftp.gnu.org/gnu/gcc/gcc-11.1.0/gcc-11.1.0.tar.gz" >gcc.tar.gz
tar xzf gcc.tar.gz
# Prepare compiling
mkdir -p "${DIR}/opt/bin"
export PREFIX="${DIR}/opt"
export TARGET=i686-elf
export PATH="$PREFIX/bin:$PATH"
# Compile binutils
mkdir "${DIR}/src/build-binutils" && cd "${DIR}/src/build-binutils"
../binutils-2.36.1/configure --target="$TARGET" --prefix="$PREFIX" --with-sysroot --disable-nls --disable-werror
$MAKE -j $($NPROC)
$MAKE install
# Compile GCC
mkdir "${DIR}/src/build-gcc" && cd "${DIR}/src/build-gcc"
../gcc-11.1.0/configure --target="$TARGET" --prefix="$PREFIX" --disable-nls --enable-languages=c --without-headers
$MAKE -j $($NPROC) all-gcc all-target-libgcc
$MAKE install-gcc install-target-libgcc
cd "${DIR}/.."
fi
}
build() {
mkdir -p build/
# Build
printf "\nBuilding...\n"
$MAKE -j $($NPROC)
# Create disk image
dd if=/dev/zero of=build/disk.img bs=1k count=32k status=none
DEV=$($SUDO losetup --find --partscan --show build/disk.img)
PART="p1"
$SUDO parted -s "$DEV" mklabel msdos mkpart primary ext2 32k 100% -a minimal set 1 boot on
$SUDO mke2fs -b 1024 -q "$DEV$PART"
$SUDO dd if=build/boot.bin of="$DEV" conv=notrunc status=none
# Mount disk and copy files
#mkdir -p mnt/
#$SUDO mount "$DEV$PART" mnt/
#$SUDO mkdir -p mnt/boot/
#$SUDO umount mnt/ || (sync && $SUDO umount mnt/)
#rm -rf mnt/
$SUDO losetup -d "$DEV"
}
emulate() {
qemu-system-i386 -d guest_errors -cpu max -serial stdio -m 256M -vga std -drive file=build/disk.img,format=raw,index=1,media=disk
}
if [ "${mode}" = "cross" ]; then
build_cross
elif [ "${mode}" = "build" ]; then
build_cross
$MAKE clean
build
else
build_cross
$MAKE clean
build
emulate
fi
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