path: root/libre/linux-libre-64/PKGBUILD

# Contributor: David P. <megver83@parabola.nu>
# Maintainer (arch32): Erich Eckner <deep42thought@archlinux32.org>
# Maintainer (arch32): Andreas Baumann <mail@andreasbaumann.cc>
# Maintainer (archarm): Kevin Mihelich <kevin@archlinuxarm.org>
# Contributor: André Silva <emulatorman@hyperbola.info>
# Contributor: Márcio Silva <coadde@hyperbola.info>
# Contributor: fauno <fauno@parabola.nu>
# Contributor: Sorin-Mihai Vârgolici <smv@yobicore.org>
# Contributor: Michał Masłowski <mtjm@mtjm.eu>
# Contributor: Luke R. <g4jc@openmailbox.org>
# Contributor: Andreas Grapentin <andreas@grapentin.org>
# Maintainer: Parabola Hackers <dev@lists.parabola.nu>

# Based on linux package

# Rationale: This package enables to run 64bit kernels with 32bit rootfs.
#
# For armv7k/aarch64, we have no aarch64 port yet, and the 32bit
# kernels don't work for 64bit computers (no 64bit DTB files, etc).
#
# In turn if we can boot Parabola on these computers, it enables
# people to work on an aarch64 port more easily as chrooting in 64bit
# rootfs from 32bit rootfs work when we have a 64bit kernel (tested on
# an x86_64 computer with a Parabola i686 rootfs and a Parabola x86_64
# chroot).
#
# This enable to make rootfs that work on both 64bit and 32bit
# computers. In that case the user will still need to select the right
# kernel at boot.
#
# Generally speaking it also enable users to benefit from many of the
# improvements of 64bit kernels (ability to chroot in 64bit rootfs,
# better security, 4GiB address space per process instead of 3GiB for
# 32bit rootfs, etc) without having to reinstall everything. In
# addition, there was and is still no conversion guide to convert a
# 32bit Parabola installation to 64bit), and in some cases (lot of
# self-built software in /usr/local, PostgreSQL database, etc) the
# migration to 64bit requires some work.
#
# As for using i686 for new installation on x86_64 computers, it can
# enable people doing that to find and fix bugs on Parabola i686 to
# enable people with 32bit-only computers (like Libreboot compatible
# I945 Thinkpads) to still be able to use Parabola.
#
# Having both architectures (arm and x86) in the same PKGBUILD enables
# to more widely test this package (if we find issues on x86, they'll
# most likely apply to arm as well). Though it can become a problem if
# we need different kernel versions for both architectures.
#
# Status:
# - Tested on both arm and x86.
# - The build is currently broken on ARM due to a missing cross
#   compiler for armv7h (it was accidentally removed and it doesn't
#   build anymore).
# - External modules (like Wireguard or tp_smapi) also need to be
#   cross compiled. So modules for linux-libre-64 need to be added
#   (like tp_smapi-64) and dkms packages need to be adapted to also
#   work for this kernel.
# - Some software (like building Guix) break with 32bit rootfs and
#   64bit kernels due to wrong assumption about the number of bits,
#   through other software (like building rust with mrustc) work
#   better (here because we have 3GiB instead of 3GiB of memory per
#   process). Most software is not affected though.

# WIP: This PKGBUILD is derived from the 'linux-libre' PKGBUILD,
#      and includes a lot of unused cruft, to minimize the diff.
#      Eventually, these differences can be merged into linux-libre,
#      once parabola has an 'aarch64' build target and repos.
#
#      For now, 'aarch64' is not yet a valid parabola target.
#      This PKGBUILD exists only for making an 'aarch64' kernel for use with
#      parabola armv7h systems. This PKGBUILD is intended to be cross-compiled
#      only from an armv7h librechroot. The per-arch mechanism for armv7h
#      is over-ridden for the special purpose of the cross-compilation.
#
#      The makedepends_armv7h, source_armv7h, and sha512sums_armv7h arrays
#      (also source_aarch64 and sha512sums_aarch64 obviously), and the comments:
#        '# cross-compile over-ride' and
#        '# TODO: merge into 'linux-libre' PKGBUILD',
#      indicate code that would eventually be deleted, merged into,
#      or associated with $CARCH: 'aarch64', if/when aarch64 becomes a valid target.
#      All other LOCs of consequence in this file,
#      should be identical to the linux-libre PKGBUILD.
#      In this way, the diff is minimal against the linux-libre PKGBUILD;
#      and it is obvious which parts are intended to become aarch64-specific,
#      or exist only for cross-compiling the 64-bit foreign kernels for armv7h and i686.
#      After that, this PKGBUILD could be simplified, to focus only on the cross-compiled kernels.


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

pkgbase=linux-libre-64 # cross-compile over-ride
pkgver=5.18.5
pkgrel=2
pkgdesc="The Linux-libre kernel and modules" # TODO: merge into 'linux-libre' PKGBUILD
pkgdesc+=' 64-bit (aarch64) for Parabola armv7h' # cross-compile over-ride
rcnver=5.18.2
rcnrel=armv7-x6
url='https://linux-libre.fsfla.org/'
arch=(i686 x86_64 armv7h)
arch=(armv7h) # cross-compile over-ride
license=(GPL2)
makedepends=(
  bc libelf pahole cpio perl tar xz
  xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick texlive-latexextra
)
makedepends_armv7h=(uboot-tools vboot-utils dtc) # required by linux-libre-chromebook
makedepends_armv7h+=(aarch64-linux-gnu-gcc-initial) # cross-compile over-ride
options=('!strip')
_srcname=linux-5.18
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-$pkgver-gnu.xz"{,.sign}
  "https://repo.parabola.nu/other/linux-libre/logos/logo_linux_"{clut224.ppm,vga16.ppm,mono.pbm}{,.sig}
  # TODO: Move (in linux-libre) config.i686 config.armv7h, linux-armv7h.preset,
  #       and "kernel"{.its,.keyblock,_data_key.vbprivk}
  #       into their respective source_<CARCH> arrays.
  #       Rename linux-armv7h.preset to linux-arm.preset, or add a new one for aarch64.
  config.i686 config.x86_64 config.armv7h    # the main kernel config files
  linux-armv7h.preset                        # armv7h preset file for mkinitcpio ramdisk
  "kernel"{.its,.keyblock,_data_key.vbprivk} # files for signing Chromebooks kernels
  # maintain the TTY over USB disconnects
  # http://www.coreboot.org/EHCI_Gadget_Debug
  0001-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch
  # fix Atmel maXTouch touchscreen support
  # https://labs.parabola.nu/issues/877
  # http://www.fsfla.org/pipermail/linux-libre/2015-November/003202.html
  0002-fix-Atmel-maXTouch-touchscreen-support.patch
  # Arch Linux patches
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-HID-apple-Properly-handle-function-keys-on-Keychron-.patch
)
source_i686=(
  # avoid using zstd compression in ultra mode (exhausts virtual memory)
  # Arch Linux 32 patches
  no-ultra-zstd.patch
)
source_armv7h=(
  # RCN patch (CM3 firmware deblobbed and bloatware removed)
  "https://repo.parabola.nu/other/rcn-libre/patches/$rcnver/rcn-libre-$rcnver-$rcnrel.patch"{,.sig}
  # Arch Linux ARM patches (armv7h)
  0001-ARM-atags-add-support-for-Marvell-s-u-boot.patch
  0002-ARM-atags-fdt-retrieve-MAC-addresses-from-Marvell-bo.patch
  0003-fix-mvsdio-eMMC-timing.patch
  0004-net-smsc95xx-Allow-mac-address-to-be-set-as-a-parame.patch
  0005-set-default-cubietruck-led-triggers.patch
  0006-exynos4412-odroid-set-higher-minimum-buck2-regulator.patch
  0007-USB-Armory-MkII-support.patch
  # ChromiumOS patches
  0001-CHROMIUM-block-partitions-efi-Add-support-for-IGNORE.patch
)
source_aarch64=(
  config.aarch64
  # Arch Linux ARM patches (aarch64)
  0001-net-smsc95xx-Allow-mac-address-to-be-set-as-a-parame.patch
  0002-arm64-dts-rockchip-disable-pwm0-on-rk3399-firefly.patch
)
source_armv7h=( ${source_aarch64[*]} ) # cross-compile over-ride
validpgpkeys=(
  '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
  '6DB9C4B4F0D8C0DC432CF6E4227CA7C556B2BA78' # David P.
)
sha512sums=('13be3762fffd74c63eeb23b0d34b994a3e5198bfdbda4f013b38f8d3edd24b9bbebe5a4bfde0f5191aa1cf2678e4517f3b5540a40b30ebc05da1f6708cbb98bb'
            'SKIP'
            '9355c0f22606c0401e8a01d6e22f0fa6e97b69a9fce6d991235da6430907fb6a788fca30bd48e5cbb743cc4a211a40806c896f660db7432e7bc85ba7634b5d06'
            'SKIP'
            '13cb5bc42542e7b8bb104d5f68253f6609e463b6799800418af33eb0272cc269aaa36163c3e6f0aacbdaaa1d05e2827a4a7c4a08a029238439ed08b89c564bb3'
            'SKIP'
            '7a3716bfe3b9f546da309c7492f3e08f8f506813afeb1c737a474c83313d5c313cf4582b65215c2cfce3b74d9d1021c96e8badafe8f6e5b01fe28d2b5c61ae78'
            'SKIP'
            '267295aa0cea65684968420c68b32f1a66a22d018b9d2b2c1ef14267bcf4cb68aaf7099d073cbfefe6c25c8608bdcbbd45f7ac8893fdcecbf1e621abdfe9ecc1'
            'SKIP'
            'bcec71d3bd1daaa27bdf4c9a10f0b302b915e8236ef47b5e6d6eaf65bfd0b34644d8d3ff6c25d894ae21dedbece3c1f1ff152fbf8525b77100bc790d0541f3f1'
            'e141c387e8045030278d683a1294bfd3d13197bf3466a9c89c4f72a53aafed606acc8e42e528479527c638af895bce2303944b5d8b8a29040f5aae8a9581dd5a'
            '47d16ffc94510d4a8773146a46cfb35aca8cfdae38d17283334cd62d92de36250fbec90e9892357033398ecc7d970127b1a41b703a8372972422ca4af7c90c70'
            '53103bf55b957b657039510527df0df01279dec59cda115a4d6454e4135025d4546167fa30bdc99107f232561c1e096d8328609ab5a876cf7017176f92ad3e0b'
            'f10af02f0cb2d31259d9633e1ba845f555f525789f750fc2ddc51bd18c5ff64fcdd242dae801623887f5ce5cdb5528bce890459f0fab9fd31a28868bb7f6bba5'
            'bb6718984a7357c9b00c37e4788480e5b8b75018c172ecc1441bc3fc5d2d42444eb5d8c7f9d2e3a7d6fed6d03acb565e3c0559486e494c40a7fe6bd0570c9ede'
            '143dea30c6da00e504c99984a98a0eb2411f558fcdd9dfa7f607d6c14e9e7dffff9cb00121d9317044b07e3e210808286598c785ee854084b993ec9cb14d8232'
            '02af4dd2a007e41db0c63822c8ab3b80b5d25646af1906dc85d0ad9bb8bbf5236f8e381d7f91cf99ed4b0978c50aee37cb9567cdeef65b7ec3d91b882852b1af'
            'b8fe56e14006ab866970ddbd501c054ae37186ddc065bb869cf7d18db8c0d455118d5bda3255fb66a0dde38b544655cfe9040ffe46e41d19830b47959b2fb168'
            '1b6c3108d5628ca6db20c2bc3431e560ab2a274aaf863e7a796f1931a35982d175247f47cbfbb7d643ffc6b742442806755bb10339e5b0577c3f232b38288891'
            'bf6d9a66be49c2cc67b0a0f3cfb61734adf7a3b032b5ed133e1e0afbf4a6ddbd3e8231e4b85fef2e3aeb7274a60f7572a4469c057ff13d81134613f01767d3b2')
sha512sums_i686=('bca15cc96f64c38adcd13a46752866b5b30555ac21e19b3f7afcd20fcb7ec585c9d990fe8f842f44d5f69d477d72867fe6a9102729f26f93f5a80b372e41ce85')
sha512sums_armv7h=('5a75b12dd386940a0bf1be630d45a514ef3c32289ec5976988764baa8483b254e5dcc879337556bfa041b6dbf9ac16debbe4b57bf86db30089661e9536ffaa0a'
                   'SKIP'
                   '8da996a42249672893fa532ccbd096347580a0dc1698c45e9c865646e2765789553b1bb42793e721de30aea70340fdc116d2e4a50580fef999ca5fc627aaf4c3'
                   '0e6ddc24011d77a2e422b642c4507317fc2d26b20f5649818a2f11acac165ccab2cf2e64ab50d44ce7affcfe12c2ef5158790e499058831e7995400b2087df78'
                   '5d2f228151148358b07744a9c09cf6e2420c4284735d4ce7dc925a1deb3970298cc95dd766ee13e094e2853847b016c3ebc2d61bb423e370b4bc33938367ebda'
                   'a206c3dc678839831d72eefee997cbe1bb877af7f6f90dfe5cab0bd7d9686a3b13a2aba74c8fbe5533872e12306ac9ea1b5eede18ef3cf10b8d01361afd67e9c'
                   'a1072dd808c63592178cc01ea3c36de946f277fb451b13c34f51a5ac134cde4a8a4d57487132af1c6d7b5820842cdda9dc4edb3da85d33bd02bf87a032c3263a'
                   '85b2e16a930b8066990c42f973d386dc3c6d62fdf3d1289bbb51df3df296c26f30051162fba49a42d38f71f05de926aa8c065097f14bd8e9f8e28a52949ead00'
                   '2e99582d8b670b6c6b27add14b60e957cbcf9cd6aae40491bd9dea6ac455c0ade0bbee21e3bdfb5e06ce83ad27c5a788404b05bf7ac93831ca18d2e60a67017c'
                   '5b77c587cf2ffb60acf1d9eb43330983548c7e81a53e0ffd2b04962a99441a0000d631ff77c245c7062afc2c8368d996a2456496d42dcb658f330e5083e5e029')
sha512sums_aarch64=('0510d1ad02d0ed0dbc03084fa36ae27b869eec8efe74dbe063b76a0b5ff09828c728baa17b89d20d092b310f3142656bcd9c66f006a6b7800ecd36550b6e15be'
                    '69e81aff3ac5aada75f7330e8c82d0a6aa229585b3f442b2e1a9b86681b0eadc925408d5e2377026599fb0dee72d29043eca4d072b0e2606adc34c872e95c7d6'
                    '4224779106cc520dc2c431322d9693cc968476706854ae9630611cf2896c48a34ca11bf31a4c3995573a128cf5838a6763bac86eb4cbaf509ade9b6a83a24369')
sha512sums_armv7h=( ${sha512sums_aarch64[*]} ) # cross-compile over-ride
_replacesarchkernel=("${_replacesarchkernel[@]/\%/${pkgbase#linux-libre}}")
_replacesoldkernels=("${_replacesoldkernels[@]/\%/${pkgbase#linux-libre}}")
_replacesoldmodules=("${_replacesoldmodules[@]/\%/${pkgbase#linux-libre}}")
_replacesarchkernel=("${_replacesarchkernel[@]/-64/}") # cross-compile over-ride

case "$CARCH" in
  armv7h) KARCH=arm64 ; CROSS_COMPILE=aarch64-linux-gnu- ;; # cross-compile over-ride
  aarch64) KARCH=arm64;; # TODO: merge into 'linux-libre' PKGBUILD
  i686|x86_64) KARCH=x86;;
  armv7h) KARCH=arm;;
esac
pkgdesc+=" 64-bit (${CROSS_COMPILE%%-*}) for Parabola ${CARCH}" # cross-compile over-ride

export KBUILD_BUILD_HOST=parabola
export KBUILD_BUILD_USER=$pkgbase
export KBUILD_BUILD_USER=${pkgbase/-64/} # cross-compile over-ride
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

  if [ "$CARCH" = "armv7h" ]; then
    local src_armv7h
    for src_armv7h in "${source_armv7h[@]}"; do
      src_armv7h="${src_armv7h%%::*}"
      src_armv7h="${src_armv7h##*/}"
      [[ $src_armv7h = *.patch ]] || continue
      echo "Applying patch $src_armv7h..."
      patch -Np1 < "../$src_armv7h"
    done
  fi

  if [ "$CARCH" = "i686" ]; then
    local src_i686
    for src_i686 in "${source_i686[@]}"; do
      src_i686="${src_i686%%::*}"
      src_i686="${src_i686##*/}"
      [[ $src_i686 = *.patch ]] || continue
      echo "Applying patch $src_i686..."
      patch -Np1 < "../$src_i686"
    done
  fi

  if [ "$CARCH" = "aarch64" ]; then # TODO: merge into 'linux-libre' PKGBUILD
                                    # TODO: better yet, all of these per-arch patching routines should be DRY-ed out
    local src_aarch64
    for src_aarch64 in "${source_aarch64[@]}"; do
      src_aarch64="${src_aarch64%%::*}"
      src_aarch64="${src_aarch64##*/}"
      [[ $src_aarch64 = *.patch ]] || continue
      echo "Applying patch $src_aarch64..."
      patch -Np1 < "../$src_aarch64"
    done
  fi

  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.$CARCH .config
  # config.aarch64 comes straight from Arch Linux ARM and doesn't have the
  # compatibility for 32bit rootfs enabled. This makes maintenance faster than
  # having to modify the configuration file by hand at each new kernel release.
  if [[ "$KARCH" == 'arm64' ]]                                             # cross-compile over-ride
  then cp ../config.aarch64 .config ; echo 'CONFIG_COMPAT=y' >> .config ;  # cross-compile over-ride
  fi                                                                       # cross-compile over-ride
  make ARCH=$KARCH CROSS_COMPILE=$CROSS_COMPILE olddefconfig               # cross-compile over-ride
  diff -u ../config.$CARCH .config || :

  make ARCH=$KARCH CROSS_COMPILE=$CROSS_COMPILE -s kernelrelease > version # cross-compile over-ride
  echo "Prepared $pkgbase version $(<version)"
}

build() {
  cd $_srcname
  make ARCH=$KARCH CROSS_COMPILE=$CROSS_COMPILE all      # cross-compile over-ride
  make ARCH=$KARCH CROSS_COMPILE=$CROSS_COMPILE htmldocs # cross-compile over-ride
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(coreutils kmod initramfs)
  optdepends=('wireless-regdb: to set the correct wireless channels of your country'
              'linux-libre-firmware: firmware images needed for some devices')
  provides=(VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)
  conflicts=() # TODO: merge into 'linux-libre' PKGBUILD (conflicts array is appended before declared)
  replaces=(virtualbox-guest-modules-arch wireguard-arch)
  provides+=("${_replacesarchkernel[@]/%/=$pkgver}" "LINUX-ABI_VERSION=$pkgver")
  conflicts+=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  replaces+=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
  # cross-compile over-rides
  # NOTE: Above is providing/replacing the archarm armv7h 'linux' with the armv7h 'linux-libre'.
  #       We do not want this aarch64 'linux-libre-64' to provide nor replace the archarm armv7h 'linux';
  #       for the obvious reason. Anyways, the parabola armv7h 'linux-libre' serves that purpose.
  #       Below is providing/replacing 'linux-libre' and the obsoleted parabola 'linux-libre-aarch64'.
  #       These are defined analogously in _package-headers(), _package-docs(), and _package-chromebook().
  conflicts=( ${conflicts[*]/linux*/} )                # cross-compile over-ride
  replaces=(  ${replaces[*]/linux*/}  )                # cross-compile over-ride
  provides_armv7h=(  linux-libre                     ) # cross-compile over-ride
  conflicts_armv7h=( linux-libre linux-libre-aarch64 ) # cross-compile over-ride
  replaces_armv7h=(  linux-libre linux-libre-aarch64 ) # cross-compile over-ride

  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
  # The default arm64 image target is 'Image.gz' (per `make -s image_name`);
  # but some u-boot configs/versions don't support that, so we build 'Image' instead.
  # TODO: merge into 'linux-libre' PKGBUILD
  [[ "$KARCH" == 'arm64' ]]                                   && # cross-compile over-ride
  install -Dm644 arch/$KARCH/boot/Image "$modulesdir/vmlinuz" ||
  install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinuz"

  # FIXME: aarch64 - the kernel is not installed under /boot
  if   [[ "$KARCH" == 'arm64' && ! -f "$pkgdir/boot/Image" ]]
  then echo "FIXME: kernel was not installed to \$pkgdir/boot"
       install -Dm644 "$modulesdir/vmlinuz" "$pkgdir/boot/vmlinuz-${basename}-64"
  fi

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

  echo "Installing modules..."
  make ARCH=$KARCH CROSS_COMPILE=$CROSS_COMPILE INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 modules_install # cross-compile over-ride

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

  if [ "$CARCH" = "armv7h" ]; then
    echo "Installing device tree binaries..."
    make ARCH=$KARCH CROSS_COMPILE=$CROSS_COMPILE INSTALL_DTBS_PATH="$pkgdir/boot/dtbs/$pkgbase" dtbs_install # cross-compile over-ride

    # armv7h presets only work with ALL_kver=$kernver
    # TODO: kernel version auto-detection does not work for ARM kernels.
    #       it may be best to not use auto-detection at all, and use the same mechanism
    #       for all arches, eg: System.map or somthing simple like this below.
    backup=("etc/mkinitcpio.d/$pkgbase.preset")
    echo "Installing mkinitcpio preset..."
    sed "s|%PKGBASE%|$pkgbase|g;s|%KERNVER%|$kernver|g" ../linux-armv7h.preset \
      | install -Dm644 /dev/stdin "$pkgdir/etc/mkinitcpio.d/$pkgbase.preset"
  fi
}

_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}")
  # cross-compile over-rides - see note in _package()
  conflicts=()                                                         # cross-compile over-ride
  replaces=()                                                          # cross-compile over-ride
  conflicts_armv7h=( linux-libre-headers linux-libre-aarch64-headers ) # cross-compile over-ride
  replaces_armv7h=(  linux-libre-headers linux-libre-aarch64-headers ) # cross-compile over-ride

  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 "$builddir/arch/$KARCH" -m644 arch/$KARCH/Makefile
  if [[ $CARCH = i686 ]]; then
    install -Dt "$builddir/arch/$KARCH" -m644 arch/$KARCH/Makefile_32.cpu
  fi
  cp -t "$builddir" -a scripts

  # required when STACK_VALIDATION is enabled
  if [[ -e tools/objtool/objtool ]]; then
    install -Dt "$builddir/tools/objtool" tools/objtool/objtool
  fi

  # required when DEBUG_INFO_BTF_MODULES is enabled
  if [[ -e tools/bpf/resolve_btfids/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/$KARCH" -a arch/$KARCH/include
  install -Dt "$builddir/arch/$KARCH/kernel" -m644 arch/$KARCH/kernel/asm-offsets.s

  # from linux-armv7
  [[ "$KARCH" != 'arm64' ]] && # cross-compile  over-ride
  if [ "$CARCH" = "armv7h" ]; then
    for i in dove omap2; do
      mkdir -p "$builddir/arch/$KARCH/mach-$i"
      cp -t "$builddir/arch/$KARCH/mach-$i/" -a arch/$KARCH/mach-$i/include
    done
    for i in omap orion versatile; do
      mkdir -p "$builddir/arch/$KARCH/plat-$i"
      cp -t "$builddir/arch/$KARCH/plat-$i/" -a arch/$KARCH/plat-$i/include
    done
  fi

  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
    [[ $arch = */$KARCH/ ]] && 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

  strip() { ${CROSS_COMPILE}strip "${@}" ; } ; # cross-compile over-ride

  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}")
  # cross-compile over-rides - see note in _package()
  conflicts=()                                                 # cross-compile over-ride
  replaces=()                                                  # cross-compile over-ride
  conflicts_armv7h=(linux-libre-docs linux-libre-aarch64-docs) # cross-compile over-ride
  replaces_armv7h=( linux-libre-docs linux-libre-aarch64-docs) # cross-compile over-ride

  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"
}

_package-chromebook() {
  pkgdesc="$pkgdesc kernel sign for Veyron Chromebooks"
  depends=(linux-libre=$pkgver)
  provides=("${_replacesarchkernel[@]/%/-armv7-chromebook=$pkgver}")
  conflicts=("${_replacesarchkernel[@]/%/-armv7-chromebook}" "${_replacesoldkernels[@]/%/-armv7-chromebook}")
  replaces=("${_replacesarchkernel[@]/%/-armv7-chromebook}" "${_replacesoldkernels[@]/%/-armv7-chromebook}")
  install=$pkgbase-chromebook.install
  # NOTE: when aarch64 becomes a supported target, 'armv7' above should be changed to "${CARCH}"
  depends=(   ${depends[*]/linux-libre/${pkgbase}} ) # cross-compile over-ride
  provides=(  ${provides[*]/armv7/aarch64}         ) # cross-compile over-ride
  conflicts=( ${conflicts[*]/armv7/aarch64}        ) # cross-compile over-ride
  replaces=(  ${replaces[*]/armv7/aarch64}         ) # cross-compile over-ride

  cd $_srcname

  cp ../kernel.its .
  mkimage -D "-I dts -O dtb -p 2048" -f kernel.its kernel.signed
  dd if=/dev/zero of=bootloader.bin bs=512 count=1
  echo 'console=tty0 init=/sbin/init root=PARTUUID=%U/PARTNROFF=1 rootwait rw noinitrd' > cmdline

  # TODO: merge into 'linux-libre' PKGBUILD (--arch ${KARCH})
  echo "Creating kernel sign..."
  vbutil_kernel \
    --pack vmlinux.kpart \
    --version 1 \
    --vmlinuz kernel.signed \
    --arch ${KARCH} \
    --keyblock ../kernel.keyblock \
    --signprivate ../kernel_data_key.vbprivk \
    --config cmdline \
    --bootloader bootloader.bin

  echo "Installing kernel sign..."
  mkdir -p "$pkgdir/boot"
  cp vmlinux.kpart "$pkgdir/boot"
}

pkgname=("$pkgbase" "$pkgbase-headers" "$pkgbase-docs")
# The chromebook package is disabled until the following error is fixed:
# |  ==> Starting package_linux-libre-64-chromebook()...
# |  FATAL ERROR: Couldn't open "arch/arm/boot/zImage": No such file or directory
# |  mkimage: Can't read kernel.signed.tmp: Invalid argument
# [[ $CARCH = armv7h ]] && pkgname+=("$pkgbase-chromebook")
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: