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path: root/extra/linux-pae/PKGBUILD
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# Maintainer: Jan Alexander Steffens (heftig) <heftig@archlinux.org>

pkgbase=linux
pkgver=6.7.7.arch1
pkgrel=1
pkgdesc='Linux'
url='https://github.com/archlinux/linux'
arch=(x86_64)
license=(GPL2)
makedepends=(
  bc
  cpio
  gettext
  libelf
  pahole
  perl
  python
  tar
  xz

  # htmldocs
  graphviz
  imagemagick
  python-sphinx
  texlive-latexextra
)
options=('!strip')
_srcname=linux-${pkgver%.*}
_srctag=v${pkgver%.*}-${pkgver##*.}
source=(
  https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/${_srcname}.tar.{xz,sign}
  $url/releases/download/$_srctag/linux-$_srctag.patch.zst{,.sig}
  config  # the main kernel config file
)
validpgpkeys=(
  ABAF11C65A2970B130ABE3C479BE3E4300411886  # Linus Torvalds
  647F28654894E3BD457199BE38DBBDC86092693E  # Greg Kroah-Hartman
  83BC8889351B5DEBBB68416EB8AC08600F108CDF  # Jan Alexander Steffens (heftig)
)
# https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
sha256sums=('256b8b44570ddbe266eb3ad0c2cba2616f1609b4a3de5014a3da5512907b14d9'
            'SKIP'
            '47208683675e5ad065c9a3821aa975fdb3c37d7d7d77222da4d6f8c3f09827d1'
            'SKIP'
            '04143712e593d45a597661fe00f89cf92d52c62df3468c68a46c952c2ef4db64')
b2sums=('ef97a036ab6cd421200b2e8f0a49c6b570d2269a5e182ea948d48d456e6414bfa61f5f6efa2bad65efbe811d2078a54a4edff9c27de609401160f3905fe27a22'
        'SKIP'
        '45e0ef14e26323bbd2457f77e4c1e9fc0c2d6fb028bb24814d38c2ebfbeaa2aee29cad2f5154df372d098856cf7f3fcd585575e5b95b93cba47ee5de9f92b8e0'
        'SKIP'
        '21083151bdcd0fc2bcc0475b9cd73bab5666a71f043eedd67b19a3a4c09c8253a5a06794ce9270215782f5885e05e70b5e424123f1bded7aa7a6d3f30d02a4b3')

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

prepare() {
  cd $_srcname

  echo "Setting version..."
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux}" > localversion.20-pkgname

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

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

  make -s kernelrelease > version
  echo "Prepared $pkgbase version $(<version)"
}

build() {
  cd $_srcname
  make all
  make -C tools/bpf/bpftool vmlinux.h feature-clang-bpf-co-re=1
  make htmldocs
}

_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=(
    virtualbox-guest-modules-arch
    wireguard-arch
  )

  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 "$builddir" -m644 .config Makefile Module.symvers System.map \
    localversion.* version vmlinux tools/bpf/bpftool/vmlinux.h
  install -Dt "$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
  install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids

  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"
}

_package-docs() {
  pkgdesc="Documentation for the $pkgdesc kernel"

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

  echo "Installing documentation..."
  local src dst
  while read -rd '' src; do
    dst="${src#Documentation/}"
    dst="$builddir/Documentation/${dst#output/}"
    install -Dm644 "$src" "$dst"
  done < <(find Documentation -name '.*' -prune -o ! -type d -print0)

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

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

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

# End of upstream PKGBUILD

# upstream git revision: 3cfc65aa439e42f6dd539f29d3ebb972c5508f7e

source+=('config.x86_64')
sha256sums+=('04143712e593d45a597661fe00f89cf92d52c62df3468c68a46c952c2ef4db64')
b2sums+=('21083151bdcd0fc2bcc0475b9cd73bab5666a71f043eedd67b19a3a4c09c8253a5a06794ce9270215782f5885e05e70b5e424123f1bded7aa7a6d3f30d02a4b3')
source_pentium4=('config.pentium4')
source_i686=('config.i686')
source_i486=('config.i486')
# fail if upstream's .config changes
for ((i=0; i<${#b2sums[@]}; i++)); do
  if [ "${b2sums[${i}]}" = '21083151bdcd0fc2bcc0475b9cd73bab5666a71f043eedd67b19a3a4c09c8253a5a06794ce9270215782f5885e05e70b5e424123f1bded7aa7a6d3f30d02a4b3' ]; then
    b2sums_pentium4=('759861f49726995d56e2fea96b60622d67fd43c8f8643b183ea0ee1efbe86e98c1435561e2d9ef3c58d581e8a6d147c8a11f4de97c2aaa25231b26db9e1c4859')
    b2sums_i686=('3c716e2c37196cb9be479e3dfddaa1ad36da4053dfdd8c84a9141289d958e2c995795a13f683507bf2a6fa09f4ccaf52a576b6589c93bd36bd934c2a1ee34312')
    b2sums_i486=('21e9e76c23d6ef348f5e54480ee3f16fb6c86d67c9103fea30fec91102e3695ebf53fa970bc8a7b842fd4763defd02b92bbd099bf77dccd4abd627f879425c06')
  fi
done

# copy architecture specific config file, not default 'config'
eval "$(
  declare -f prepare | \
    sed '
      s,\.\./config,../config.$CARCH,
    '
)"

# patch architecture when copying the kernel Makefile
eval "$(
  declare -f package_linux-headers | \
    sed '
      \,/tools/objtool" ,d
      \,arch/x86/Makefile, {
        a \
        install -t "${builddir}/arch/x86" -m644 arch/x86/Makefile_32.cpu
      }
      $ i depends+=(gcc-libs=$(_get_gcc_version_from_config))
    '
)"

_get_gcc_version_from_config() {
  if [ -z "$srcdir" ]; then
    gcc --version \
    | sed '
      s@^.* @@
      1!d
    '
  else
    for _config_file in "$srcdir/$_srcname/.config" "$srcdir/config" "${srcdir%/*}/config"; do
      [ -f "$_config_file" ] && break
    done
    sed '
      s/^CONFIG_CC_VERSION_TEXT="gcc (GCC) \([0-9.]\+\)"$/\1/
      t
      d
    ' "$_config_file"
  fi
}

# use our tarballer instead of cloning from git
for ((i=0; i<${#source[@]}; i++)); do
  infos=$(
    printf '%s\n' "${source[${i}]}" | \
      sed '
        s@^\(\([^:]\+\)::\)\?\(git\|hg\)+\([^#?]\+\)\(?signed\)\?#\(\(tag\|commit\)=[^?]\+\)$@\3 \2 \4 \5 \6@
        t
        s@^\(\([^:]\+\)::\)\?\(git\|hg\)+\([^#?]\+\)#\(\(tag\|commit\)=[^?]\+\)\(?signed\)\?$@\3 \2 \4 \7 \5@
        t
        d
      '
  )
  if [ -n "${infos}" ]; then
    source[${i}]=$(
      type="${infos%% *}"
      infos="${infos#* }"
      if [ -n "${infos%% *}" ]; then
        prefix="${infos%% *}"
      else
        prefix=''
      fi
      infos="${infos#* }"
      repo="${infos%% *}"
      repo64=$(
        printf '%s' "${repo}" | \
          base64 -w0 | \
          sed 's/=/%3D/g'
      )
      infos="${infos#* }"
      if [ "${infos%% *}" = '?signed' ]; then
        key_check=$(
          printf '&valid_keys='
          printf '%s,' "${validpgpkeys[@]}" | \
            sed 's/,$//'
        )
      else
        key_check=''
      fi
      infos="${infos#* }"
      if [ -z "${prefix}" ]; then
        prefix="${repo%.git}"
        prefix="${prefix##*/}"
      fi
      prefix_64=$(
        printf '%s/' "${prefix}" | \
          base64 -w0 | \
          sed 's/=/%3D/g'
      )

      printf '%s-%s.tar.gz::https://archive-server.archlinux32.org/?t=%s&p=%s&r=%s%s&%s\n' \
        "${prefix}" \
        "${pkgver}" \
        "${type}" \
        "${prefix_64}" \
        "${repo64}" \
        "${key_check}" \
        "${infos}"
    )
  fi
done

# upstream prepare() does already do the *.patch patching

# avoid using zstd compression in ultra mode (exhausts virtual memory)
source+=('no-ultra-zstd.patch')
sha256sums+=('d32270be5fd9c3e3ba50f3aef33f6cfcb85be0c8216f03b777287cc621fdff28')
b2sums+=('165ab9dd8cedeaae5327accc1581c19cf0be55f923b03feb889cad3351b74c7c4cd3d3c206938e5152bfe1d947513dea8f630f8f5544099ec13d16d254725c40')

# temporarily disabled documentation due to sphinx_rtd_theme (FS32#163)
pkgname=(
  $(
    printf '%s\n' "${pkgname[@]}" | \
      grep -v '^\$pkgbase-docs'
  )
)
eval "$(
  declare -f build | \
    sed '
      s/\bhtmldocs\b//
    '
)"
makedepends=(${makedepends[@]//python-sphinx_rtd_theme/})
makedepends=(${makedepends[@]//python-sphinx<6.0.0/})
makedepends=(${makedepends[@]//graphviz/})
makedepends=(${makedepends[@]//imagemagick/})
makedepends=(${makedepends[@]//texlive-latexextra/})