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# Maintainer: David P. <megver83@parabola.nu>
# Contributor: André Silva <emulatorman@hyperbola.info>
# Contributor: Márcio Silva <coadde@hyperbola.info>

# Based on linux-pae package

_replacesarchkernel=('linux%') # '%' gets replaced with kernel suffix
_replacesoldkernels=() # '%' gets replaced with kernel suffix
_replacesoldmodules=() # '%' gets replaced with kernel suffix

pkgbase=linux-libre-pae
pkgver=5.17.9
pkgrel=1
pkgdesc='Linux-libre PAE (physical address extension)'
url='https://linux-libre.fsfla.org/'
arch=(i686)
license=(GPL2)
makedepends=(
  bc libelf pahole cpio perl tar xz
  xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick texlive-latexextra
)
options=('!strip')
_srcname=linux-5.17
source=(
  "https://linux-libre.fsfla.org/pub/linux-libre/releases/${_srcname##*-}-gnu/linux-libre-${_srcname##*-}-gnu.tar.xz"{,.sign}
  "https://linux-libre.fsfla.org/pub/linux-libre/releases/$pkgver-gnu/patch-${_srcname##*-}-gnu-$pkgver-gnu.xz"{,.sign}
  "https://repo.parabola.nu/other/linux-libre/logos/logo_linux_"{clut224.ppm,vga16.ppm,mono.pbm}{,.sig}
  config         # the main kernel config files

  # maintain the TTY over USB disconnects
  # http://www.coreboot.org/EHCI_Gadget_Debug
  0001-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch
  # fix Atmel maXTouch touchscreen support
  # https://labs.parabola.nu/issues/877
  # http://www.fsfla.org/pipermail/linux-libre/2015-November/003202.html
  0002-fix-Atmel-maXTouch-touchscreen-support.patch
  # Arch Linux patches
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-random-treat-bootloader-trust-toggle-the-same-way-as.patch
  0003-tick-Detect-and-fix-jiffies-update-stall.patch
  0004-tick-rcu-Remove-obsolete-rcu_needs_cpu-parameters.patch
  0005-tick-rcu-Stop-allowing-RCU_SOFTIRQ-in-idle.patch
  0006-lib-irq_poll-Declare-IRQ_POLL-softirq-vector-as-ksof.patch
  0007-NFSv4.1-provide-mount-option-to-toggle-trunking-disc.patch
  # Arch Linux 32 patches
  no-ultra-zstd.patch
)
validpgpkeys=(
  '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
  '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
)
sha512sums=('565de7f956e40a931858cb29b61619f25fc57ce588b8762bef806e470d20bbbdf98a6e1c55eccae61a7365c0ecaae4825d81f7eec8689911710949ba5b34ce0c'
            'SKIP'
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            'SKIP'
            '13cb5bc42542e7b8bb104d5f68253f6609e463b6799800418af33eb0272cc269aaa36163c3e6f0aacbdaaa1d05e2827a4a7c4a08a029238439ed08b89c564bb3'
            'SKIP'
            '7a3716bfe3b9f546da309c7492f3e08f8f506813afeb1c737a474c83313d5c313cf4582b65215c2cfce3b74d9d1021c96e8badafe8f6e5b01fe28d2b5c61ae78'
            'SKIP'
            '267295aa0cea65684968420c68b32f1a66a22d018b9d2b2c1ef14267bcf4cb68aaf7099d073cbfefe6c25c8608bdcbbd45f7ac8893fdcecbf1e621abdfe9ecc1'
            'SKIP'
            '55fdec0555ef18aaaba22ff6cdad477c6c80b5dd3b0477b39e7099b3838376f8c3b42e44f579758d8e764d5a4750f6fc8378e2d5b05536cdebb17c13f734c695'
            '02af4dd2a007e41db0c63822c8ab3b80b5d25646af1906dc85d0ad9bb8bbf5236f8e381d7f91cf99ed4b0978c50aee37cb9567cdeef65b7ec3d91b882852b1af'
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            '9543379c1feba5585196396cc3ca6b9b957b967bdac29c502867ffb502743e1793c4a9ccdca4c30226120793df7bf887fb0cdf365d9304594777c16a0addd63b'
            '37719ac336936ba70ef58d63e409a3df36a06f885205595ee55a20bdb6a801c698cb5412fa19398f375c111634713c4bee1619bf08429830ab02ff5fe257ef6c'
            '44acd1454ad7faa4e993597bff67899a14e85e030f948db8590d12fc4eb05fb732e53e9a96bb59972ec319e54c160bbbee7c1568cdc199342afa4088b4a5eee3'
            '0e1ea62e127883826655fa74c232ef3b8537fe0a1a2c7b89a710f43ce0b7b483e1b5bc14fa44cffae5aaadfd9c5b88b5e326d5feca9bf2fb922844bd6309f855'
            '0c40c8a99e202dd869c54964495fd8005efbbd74679901bd976fa297b8d65554a8071345da3b171ef95d7fd2515588d05f09cf2ca6c86b0bcc9ff0468c997482'
            'b0c2bef3e76a25640539a6814bf8a120d000995d1d88c80b667b9bd1e489a452da47ee01b96cd0104f0a7627d5ff7ff916506f137f6cd6fb4df4f666bf2d92be'
            '251d94b05ba7b252eef738efd8a5d75ec26df11bcd4e99b468db89cb370f56cc56e949b2fb1a7d00c61ded49fa0e0355551ea98f46662d4220cddacf5640e40b'
            'bca15cc96f64c38adcd13a46752866b5b30555ac21e19b3f7afcd20fcb7ec585c9d990fe8f842f44d5f69d477d72867fe6a9102729f26f93f5a80b372e41ce85')

_replacesarchkernel=("${_replacesarchkernel[@]/\%/${pkgbase#linux-libre}}")
_replacesoldkernels=("${_replacesoldkernels[@]/\%/${pkgbase#linux-libre}}")
_replacesoldmodules=("${_replacesoldmodules[@]/\%/${pkgbase#linux-libre}}")

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

prepare() {
  cd $_srcname

  if [ "${_srcname##*-}" != "$pkgver" ]; then
    echo "Applying upstream patch..."
    patch -Np1 < "../patch-${_srcname##*-}-gnu-$pkgver-gnu"
  fi

  echo "Adding freedo as boot logo..."
  install -m644 -t drivers/video/logo \
    ../logo_linux_{clut224.ppm,vga16.ppm,mono.pbm}

  echo "Setting version..."
  scripts/setlocalversion --save-scmversion
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux-libre}" > localversion.20-pkgname

  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 || :

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

build() {
  cd $_srcname
  make all
  make htmldocs
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(coreutils kmod initramfs)
  optdepends=('wireless-regdb: to set the correct wireless channels of your country'
              'linux-libre-firmware: firmware images needed for some devices')
  provides=(VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)
  provides+=("${_replacesarchkernel[@]/%/=${pkgver%.*}}" "LINUX-ABI_VERSION=${pkgver%.*}")
  conflicts=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  replaces=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")

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

  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..."
  make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
    DEPMOD=/doesnt/exist modules_install  # Suppress depmod

  # remove build and source links
  rm "$modulesdir"/{source,build}
}

_package-headers() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  depends=(pahole)
  provides=("${_replacesarchkernel[@]/%/-headers=${pkgver%%_*}}")
  conflicts=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
  replaces=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
  
  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 "$builddir/arch/x86" -m644 arch/x86/Makefile
  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile_32.cpu
  cp -t "$builddir" -a scripts

  # 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 "$(file -bi "$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 $pkgdesc kernel"
  provides=("${_replacesarchkernel[@]/%/-docs=${pkgver%%_*}}")
  conflicts=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")
  replaces=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")

  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: