path: root/PKGBUILD

# Maintainer: Kyle De'Vir (QuartzDragon) <kyle[dot]devir[at]mykolab[dot]com>
# Original package maintainer: Jan Alexander Steffens (heftig) <heftig@archlinux.org>

### BUILD OPTIONS

# Set these variables to ANYTHING that is not null to enable them

# Set to force building with a particular commit ~ takes precedence over _bcachefs_branch
_bcachefs_commit=

# Set to force building with a particular branch
_bcachefs_branch=

# Tweak kernel options prior to a build via nconfig
_makenconfig=

# Optionally select a sub architecture by number if building in a clean chroot
# Leaving this entry blank will require user interaction during the build
# which will cause a failure to build if using makechrootpkg. Note that the
# generic (default) option is 40.
#
# Note - the march=native option is unavailable by this method, use the nconfig
# and manually select it.
#
#   Processor family
#   1. AMD Opteron/Athlon64/Hammer/K8 (MK8)
#   2. AMD Opteron/Athlon64/Hammer/K8 with SSE3 (MK8SSE3)
#   3. AMD 61xx/7x50/PhenomX3/X4/II/K10 (MK10)
#   4. AMD Barcelona (MBARCELONA)
#   5. AMD Bobcat (MBOBCAT)
#   6. AMD Jaguar (MJAGUAR)
#   7. AMD Bulldozer (MBULLDOZER)
#   8. AMD Piledriver (MPILEDRIVER)
#   9. AMD Steamroller (MSTEAMROLLER)
#   10. AMD Excavator (MEXCAVATOR)
#   11. AMD Zen (MZEN)
#   12. AMD Zen 2 (MZEN2)
#   13. AMD Zen 3 (MZEN3)
#   14. AMD Zen 4 (MZEN4)
#   15. AMD Zen 5 (MZEN5)
#   16. Intel P4 / older Netburst based Xeon (MPSC)
#   17. Intel Atom (MATOM)
#   18. Intel Core 2 (MCORE2)
#   19. Intel Nehalem (MNEHALEM)
#   20. Intel Westmere (MWESTMERE)
#   21. Intel Silvermont (MSILVERMONT)
#   22. Intel Goldmont (MGOLDMONT)
#   23. Intel Goldmont Plus (MGOLDMONTPLUS)
#   24. Intel Sandy Bridge (MSANDYBRIDGE)
#   25. Intel Ivy Bridge (MIVYBRIDGE)
#   26. Intel Haswell (MHASWELL)
#   27. Intel Broadwell (MBROADWELL)
#   28. Intel Skylake (MSKYLAKE)
#   29. Intel Skylake X (MSKYLAKEX)
#   30. Intel Cannon Lake (MCANNONLAKE)
#   31. Intel Ice Lake (MICELAKE_CLIENT)
#   32. Intel Ice Lake Server (MICELAKE_SERVER)
#   33. Intel Cascade Lake (MCASCADELAKE)
#   34. Intel Cooper Lake (MCOOPERLAKE)
#   35. Intel Tiger Lake (MTIGERLAKE)
#   36. Intel Sapphire Rapids (MSAPPHIRERAPIDS)
#   37. Intel Rocket Lake (MROCKETLAKE)
#   38. Intel Alder Lake (MALDERLAKE)
#   39. Intel Raptor Lake (MRAPTORLAKE)
#   40. Intel Meteor Lake (MMETEORLAKE)
#   41. Intel Emerald Rapids (MEMERALDRAPIDS)
#   42. Generic-x86-64 (GENERIC_CPU)
#   43. Intel-Native optimizations autodetected by the compiler (MNATIVE_INTEL)
#   44. AMD-Native optimizations autodetected by the compiler (MNATIVE_AMD)
_subarch=

# Compile ONLY used modules to VASTLY reduce the number of modules built
# and the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD read the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
_localmodcfg=

pkgbase=linux-bcachefs-git
pkgver=6.14.0.rc1.1.bcachefs.git.00042.g63bbe0ca4167.dirty
pkgrel=1
pkgdesc='Linux'
url='https://github.com/koverstreet/bcachefs'
arch=(x86_64)
license=(GPL-2.0-only)
makedepends=(
  bc
  cpio
  gettext
  libelf
  pahole
  perl
  python
  tar
  xz
  git

  # htmldocs
  graphviz
  imagemagick
  python-sphinx
  python-yaml
  texlive-latexextra
)
options=(
  !debug
  !strip
)

_srcname="linux-bcachefs"
_src_url="https://github.com/koverstreet/bcachefs.git"
_srcname_kernel_patch="kernel_compiler_patch"
_src_url_kernel_patch="https://github.com/graysky2/${_srcname_kernel_patch}.git"
_kernel_patch_name="more-ISA-levels-and-uarches-for-kernel-6.1.79+.patch"

_pkgdesc_extra="~ featuring Kent Overstreet's bcachefs filesystem"

_kernel_base_string="${_srcname}::git+${_src_url}"
if [ -n "${_bcachefs_commit}" ]; then
  kernel_source_string="${_kernel_base_string}#commit=${_bcachefs_commit}"
elif [ -n "${_bcachefs_branch}" ]; then
  kernel_source_string="${_kernel_base_string}#branch=${_bcachefs_branch}"
else
  kernel_source_string="${_kernel_base_string}#branch=master"
fi

source=(
  ${kernel_source_string}
  #"${_srcname_upstream}::git+${_src_url_upstream}"
  "git+${_src_url_kernel_patch}"
  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=('SKIP'
            'SKIP'
            '3c33ec31f12ce78e261daa1d46d024dab62c9edf0a057f4b98d64fb02a531315')
b2sums=('SKIP'
        'SKIP'
        '4e8db3a4410787736c3c426665f6c1d9770fe3f34c98ae57dfd85da0e41519caaee5b0225b4dc6aebc720b6922482cecb6f1709e3b8455998a24bf27759243bb')

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

  FullPatchesArray=(
    $_srcname_kernel_patch/$_kernel_patch_name
  )
  for MyPatch in "${FullPatchesArray[@]}"
  do
    echo "Applying patch $MyPatch..."
    patch -Np1 -i "$srcdir/$MyPatch"
  done

  echo "Setting config..."
  cp ../config .config

  if [ -n "$_subarch" ]; then
    yes "$_subarch" | make oldconfig
  else
    make prepare
  fi

  ### Optionally load needed modules for the make localmodconfig
  # See https://aur.archlinux.org/packages/modprobed-db
  if [ -n "$_localmodcfg" ]; then
    if [ -f $HOME/.config/modprobed.db ]; then
      echo "Running Steven Rostedt's make localmodconfig now"
      make LSMOD=$HOME/.config/modprobed.db localmodconfig
    else
      echo "No modprobed.db data found"
      exit
    fi
  fi

  # do not run 'make olddefconfig' as it sets default options
  yes "" | make config >/dev/null

  echo "Showing config diff"
  diff -u ../config .config || :

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

  [[ -z "$_makenconfig" ]] || make nconfig

  # save configuration for later reuse
  cat .config > "$startdir/config.last"
}

pkgver() {
  cd $_srcname
  printf "%s" "${_srcver_tag//-/.}"
}

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 $_pkgdesc_extra"
  depends=(
    coreutils
    initramfs
    kmod
    bcachefs-tools
  )
  optdepends=(
    'linux-firmware: firmware images needed for some devices'
    'scx-scheds: to use sched-ext schedulers'
    'wireless-regdb: to set the correct wireless channels of your country'
  )
  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 $_pkgdesc_extra"
  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
  ln -srt "$builddir" "$builddir/scripts/gdb/vmlinux-gdb.py"

  # 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: