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File PKGBUILD of Package linux-px

pkgbase=linux-px
pkgname=("$pkgbase" "$pkgbase-headers")
pkgver=6.8.8
pkgrel=1
pkgdesc='Linux Px'
url="https://www.kernel.org"
arch=(x86_64)
license=(GPL-2.0-only)
makedepends=(
  bc cpio gettext libelf pahole perl python tar xz
  clang llvm lld
)
options=(
  !debug
  !strip
)
_srcname=linux-${pkgver/.rc/-rc}
_kernver=$(expr match "$pkgver" '$[0-9]\+\.[0-9]\+$')
source=(
  "https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-$pkgver.tar.xz"
  "file://$PWD/kernel-patches/$_kernver/amd-pstate-patches-v8/0001-amd-6.8-merge-changes-from-dev-tree.patch"
  "file://$PWD/kernel-patches/$_kernver/arch-patches-v5/0001-arch-patches.patch"
  "file://$PWD/kernel-patches/$_kernver/bbr3-patches/0001-tcp-bbr3-initial-import.patch"
  "file://$PWD/kernel-patches/$_kernver/bore-patches-v5/0001-linux$_kernver-bore5.1.0.patch"
  "file://$PWD/kernel-patches/$_kernver/le9uo-default-on-patches-v4/0001-mm-$_kernver-add-le9uo.patch"
  "file://$PWD/kernel-patches/$_kernver/lrng-patches/0001-lrng-$_kernver-introduce-Linux-Random-Number-Generator.patch"
  "file://$PWD/kernel-patches/$_kernver/v4l2loopback-patches-v2/0001-v4l2loopback-patches.patch"
  "file://$PWD/kernel-patches/$_kernver/zstd-dev-patches-v9/0001-zstd-dev-patches.patch"
  'optimize_harder_Ofast.patch'
  config         # the main kernel config file
)
b2sums=('3c04407c6875d1547c18024db7a020c450b332b10707c847208080819fa92624281fd9b628c1fefe7c16439f60d64dcc80010726a7d4320354b682ccaadb1f35'
        'SKIP'
        'SKIP'
        'SKIP'
        'SKIP'
        'SKIP'
        'SKIP'
        'SKIP'
        'SKIP'
        '2d9da864f0fb5637555b8d5cf8ef0c6f7c76f5277072dcd954bd70cbed3cc22ef7f3d88894f00e6db1b20a10f23dac387a4a16b99b23ed3e7fb635d8c701e09d'
        '8f8fc7e2249db6b26492b5cc7f7df3b5e2a98ecf7575100254ff83a36e13abcec909b62e0f5f1f5d43aff14eae0155cdf785db0c342ca51d85023a5fb999249d')

export KBUILD_BUILD_HOST=archlinux
export KBUILD_BUILD_USER=$pkgbase
export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"

export LLVM=1
export KCFLAGS='-Ofast -march=znver3 -mtune=znver3'
export KCPPFLAGS='-Ofast -march=znver3 -mtune=znver3'

_make() {
  test -s version
  make KERNELRELEASE="$(<version)" "$@"
}

_prepare() {
  cd $_srcname

echo "Setting version..."
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux}" > localversion.20-pkgname
  make defconfig
  make -s kernelrelease > version
  make mrproper

local src
  for src in "${source[@]}"; do
    src="${src%%::*}"
    src="${src##*/}"
    [[ $src = *.patch ]] || continue
    echo "Applying patch $src..."
    patch -Np1 < "../$src"
  done

echo "Setting config..."
  cp ../config .config
  _make olddefconfig
  diff -u ../config .config || :

echo "Prepared $pkgbase version $(<version)"
}

prepare() {
  _prepare >&2
}

build() {
  cd $_srcname
  _jobs=$(($(nproc) + 1))
  make -j${_jobs} all
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(coreutils initramfs kmod)
  optdepends=('wireless-regdb: to set the correct wireless channels of your country'
              'linux-firmware: firmware images needed for some devices')
  provides=(KSMBD-MODULE VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)
  replaces=()

cd $_srcname
  local modulesdir="$pkgdir/usr/lib/modules/$(<version)"

echo "Installing boot image..."
  # systemd expects to find the kernel here to allow hibernation
  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
  install -Dm644 "$(_make -s image_name)" "$modulesdir/vmlinuz"

# Used by mkinitcpio to name the kernel
  echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"

echo "Installing modules..."
  ZSTD_CLEVEL=19 _make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
    DEPMOD=/doesnt/exist modules_install  # Suppress depmod

# remove build link
  rm "$modulesdir"/build
}

_package-headers() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  depends=(pahole)

cd $_srcname
  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

echo "Installing build files..."
  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
    localversion.* version vmlinux
  install -Dt "$builddir/kernel" -m644 kernel/Makefile
  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
  cp -t "$builddir" -a scripts

# required when STACK_VALIDATION is enabled
  install -Dt "$builddir/tools/objtool" tools/objtool/objtool

# required when DEBUG_INFO_BTF_MODULES is enabled
  if [ -f "$builddir/tools/bpf/resolve_btfids" ]; then install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids ; fi

echo "Installing headers..."
  cp -t "$builddir" -a include
  cp -t "$builddir/arch/x86" -a arch/x86/include
  install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s

install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h

# https://bugs.archlinux.org/task/13146
  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

# https://bugs.archlinux.org/task/20402
  install -Dt "$builddir/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
  install -Dt "$builddir/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
  install -Dt "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h

# https://bugs.archlinux.org/task/71392
  install -Dt "$builddir/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.h

echo "Installing KConfig files..."
  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;

echo "Removing unneeded architectures..."
  local arch
  for arch in "$builddir"/arch/*/; do
    [[ $arch = */x86/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

echo "Removing documentation..."
  rm -r "$builddir/Documentation"

echo "Removing broken symlinks..."
  find -L "$builddir" -type l -printf 'Removing %P\n' -delete

echo "Removing loose objects..."
  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete

echo "Stripping build tools..."
  local file
  while read -rd '' file; do
    case "$(file -Sib "$file")" in
      application/x-sharedlib\;*)      # Libraries (.so)
        strip -v $STRIP_SHARED "$file" ;;
      application/x-archive\;*)        # Libraries (.a)
        strip -v $STRIP_STATIC "$file" ;;
      application/x-executable\;*)     # Binaries
        strip -v $STRIP_BINARIES "$file" ;;
      application/x-pie-executable\;*) # Relocatable binaries
        strip -v $STRIP_SHARED "$file" ;;
    esac
  done < <(find "$builddir" -type f -perm -u+x ! -name vmlinux -print0)

echo "Stripping vmlinux..."
  strip -v $STRIP_STATIC "$builddir/vmlinux"

echo "Adding symlink..."
  mkdir -p "$pkgdir/usr/src"
  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"
}

for _p in "${pkgname[@]}"; do
  eval "package_$_p() {
    $(declare -f "_package${_p#$pkgbase}")
    _package${_p#$pkgbase}
  }"
done

# vim:set ts=8 sts=2 sw=2 et:

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