build

#!/usr/bin/env sh

export LLVM=1
export LLVM_IAS=1
export CC=clang
export HOSTCC=clang

git checkout HEAD -- scripts/Makefile.host
git checkout HEAD -- scripts/genksyms/Makefile
git checkout HEAD -- scripts/genksyms/lex.l
git checkout HEAD -- scripts/kconfig/parser.y

# export CFLAGS="$CFLAGS -mllvm -asan-stack=0 -fsanitize=kernel-address"
# export CFLAGS="$CFLAGS -Wframe-larger-than=8192"
patch -p1 < make-yacc-usage-POSIX-compliant.diff

# VERSION="$(make kernelversion)"
make kernelrelease > version
read ver < version
stamp=$ver-$(date +%F-%H-%M-%S)

cp .config oldconfig
make olddefconfig
# make oldconfig && make prepare
make prepare

make clean

# Determine arch
case $KISS_XHOST_ARCH in
    aarch64)     arch=arm64;;
    aarch64_be)  arch=arm64;;
    armv7)       arch=arm;;
    x86_64)      arch=x86_64;;
    powerpc64le) arch=powerpc;;
    powerpc64)   arch=powerpc;;
    powerpcle)   arch=powerpc;;
    powerpc)     arch=powerpc;;
    riscv64)     arch=riscv;;
    riscv32)     arch=riscv;;
    i686)        arch=i386;;
   *) echo "Unsupported platform: $KISS_XHOST_ARCH"; exit;;
esac

# Always use the host compiler here
make LLVM=1 LLVM_IAS=1 ARCH=$arch CROSS_COMPILE=$KISS_XHOST_ARCH HOSTCC="clang" headers

# https://www.kernel.org/doc/Documentation/kbuild/headers_install.txt
doas make headers_install ARCH=x86_64 CROSS_COMPILE=$KISS_XHOST_ARCH INSTALL_HDR_PATH=/usr
doas \chown -R $USER:users .

# pkg_dir="${HOME}/.cache/kiss/proc/linux/pkg"
# # The headers require rsync for installation, this command
# # simply does the equivalent using find, mkdir and cp.
# find usr/include -name \*.h -type f | while read -r file; do
#     doas mkdir -p "$pkg_dir/${file%/*}"
#     doas cp -f "$file" "$pkg_dir/$file"
# done

make LLVM=1 LLVM_IAS=1 -j13 > build.log 2>&1

[ -f "arch/x86/boot/bzImage" ] && {

    make CC=clang HOSTCC=clang -no-intergrated-as LLVM=1 LLVM_IAS=1 INSTALL_MOD_PATH=/ ARCH=x86_64 modules

    doas make LLVM=1 LLVM_IAS=1 modules_install
    doas make ARCH=$arch CROSS_COMPILE=$KISS_XHOST_ARCH CC=clang HOSTCC=clang LLVM=1 LLVM_IAS=1 install

    [ ! -d "/boot/efi/EFI/efistub" ] && doas mkdir -p "/boot/efi/EFI/efistub"
    doas cp -f /boot/vmlinuz /boot/efi/EFI/efistub/vmlinuz.efi
    # doas sh /mnt/b "kiss on nvme1" "/dev/nvme1n1" "p3" "p2"

    doas cp .config /boot/config-${stamp}
    doas mv /boot/vmlinuz /boot/vmlinuz-${stamp}
    doas mv /boot/System.map /boot/System.map-${stamp}
    doas grub-mkconfig -o /boot/grub/grub.cfg

    ./backup
}