path: root/PKGBUILD

# Maintainer: Piotr Gorski <lucjan.lucjanov@gmail.com>
# Contributor: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
# Contributor: Tobias Powalowski <tpowa@archlinux.org>
# Contributor: Thomas Baechler <thomas@archlinux.org>

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

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

### Tweak kernel options prior to a build via menuconfig
_makemenuconfig=

### Tweak kernel options prior to a build via xconfig
_makexconfig=

### Tweak kernel options prior to a build via gconfig
_makegconfig=

# NUMA is optimized for multi-socket motherboards.
# A single multi-core CPU actually runs slower with NUMA enabled.
# See, https://bugs.archlinux.org/task/31187
_NUMAdisable=y

# Compile ONLY used modules to VASTLYreduce 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=

# Use the current kernel's .config file
# Enabling this option will use the .config of the RUNNING kernel rather than
# the ARCH defaults. Useful when the package gets updated and you already went
# through the trouble of customizing your config options.  NOT recommended when
# a new kernel is released, but again, convenient for package bumps.
_use_current=

### Running with a 1000 HZ tick rate
_1k_HZ_ticks=

### Do not edit below this line unless you know what you're doing

pkgbase=linux-aufs
# pkgname=('linux-aufs' 'linux-aufs-headers' 'linux-aufs-docs')
_major=5.16
_minor=11
pkgver=${_major}.${_minor}
_srcname=linux-${pkgver}
pkgrel=1
pkgdesc='Linux AUFS'
arch=('x86_64')
url="https://github.com/sfjro/aufs5-standalone"
license=('GPL2')
options=('!strip')
makedepends=('kmod' 'bc' 'libelf' 'python-sphinx' 'python-sphinx_rtd_theme'
             'graphviz' 'imagemagick' 'pahole' 'cpio' 'perl' 'tar' 'xz')
#_lucjanpath="https://raw.githubusercontent.com/sirlucjan/kernel-patches/master/${_major}"
_lucjanpath="https://gitlab.com/sirlucjan/kernel-patches/raw/master/${_major}"
_aufs_path="aufs-patches"
_aufs_ver="20220221"
_aufs_patch="0001-aufs-${_aufs_ver}.patch"
_compiler_path="cpu-patches-sep"
_compiler_patch="0001-cpu-${_major}-merge-graysky-s-patchset.patch"

source=("https://www.kernel.org/pub/linux/kernel/v5.x/${_srcname}.tar.xz"
        "https://www.kernel.org/pub/linux/kernel/v5.x/${_srcname}.tar.sign"
        "${_lucjanpath}/${_aufs_path}/${_aufs_patch}"
        "${_lucjanpath}/${_compiler_path}/${_compiler_patch}"
        "${_lucjanpath}/arch-patches-v3-sep/0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch"
        "${_lucjanpath}/arch-patches-v3-sep/0002-Bluetooth-btintel-Fix-bdaddress-comparison-with-garb.patch"
        "${_lucjanpath}/arch-patches-v3-sep/0003-Bluetooth-Read-codec-capabilities-only-if-supported.patch"
        "${_lucjanpath}/arch-patches-v3-sep/0004-Bluetooth-fix-deadlock-for-RFCOMM-sk-state-change.patch"
         # the main kernel config files
        'config')

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

    ### Setting version
        echo "Setting version..."
        sed -e "/^EXTRAVERSION =/s/=.*/=/" -i Makefile
        scripts/setlocalversion --save-scmversion
        echo "-$pkgrel" > localversion.10-pkgrel
        echo "${pkgbase#linux}" > localversion.20-pkgname

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

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

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

    ### Optionally use running kernel's config
	# code originally by nous; http://aur.archlinux.org/packages.php?ID=40191
	if [ -n "$_use_current" ]; then
		if [[ -s /proc/config.gz ]]; then
			echo "Extracting config from /proc/config.gz..."
			# modprobe configs
			zcat /proc/config.gz > ./.config
		else
			warning "Your kernel was not compiled with IKCONFIG_PROC!"
			warning "You cannot read the current config!"
			warning "Aborting!"
			exit
		fi
	fi

    ### Optionally set tickrate to 1000
	if [ -n "$_1k_HZ_ticks" ]; then
		echo "Setting tick rate to 1k..."
                scripts/config --disable CONFIG_HZ_300
                scripts/config --enable CONFIG_HZ_1000
                scripts/config --set-val CONFIG_HZ 1000
	fi

    ### Optionally disable NUMA for 64-bit kernels only
        # (x86 kernels do not support NUMA)
        if [ -n "$_NUMAdisable" ]; then
            echo "Disabling NUMA from kernel config..."
            scripts/config --disable CONFIG_NUMA
        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

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

    ### Running make menuconfig
	[[ -z "$_makemenuconfig" ]] || make menuconfig

    ### Running make xconfig
	[[ -z "$_makexconfig" ]] || make xconfig

    ### Running make gconfig
	[[ -z "$_makegconfig" ]] || make gconfig

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

build() {
  cd $_srcname

  make all
  make htmldocs
}

_package() {
    pkgdesc="The $pkgdesc kernel and modules"
    depends=('coreutils' 'kmod' 'initramfs')
    optdepends=('crda: to set the correct wireless channels of your country'
                'linux-firmware: firmware images needed for some devices'
                'modprobed-db: Keeps track of EVERY kernel module that has ever been probed - useful for those of us who make localmodconfig')
    provides=(VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)

  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 modules_install

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

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

  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

sha512sums=('d877304a868cf29bb32d059544806314c2cd975be6132eee645d1dd54ed6e1281c4ea4a18ce30c9b59a8d2b5cd9a0bcf9933a36d4754201fb04e06dee2717e7a'
            'SKIP'
            '9e00ed68b58729378b47e97d7cc582390271c9ba4a3fa69ecba1895f701c155d09142a7b53ea040420f6d5a94c750f2e53c99564bdf24a4cf45b22d03297630c'
            '5cb79731f957372cbd3ddaf93ac1cbc6eca4a526225f5bbe9c5eed11529fbefa66934ac5002410505df84281144da15e39326a8df886fe45da937304ed0b6fcf'
            'b778cb2a026174b4f0989998101361403890ff362f6b114fe88079f6bc6f92b19587c48f6260be7b4e60440bad3ec6914f225511390e2e39b665d1d2bed71e45'
            '95b13eb881ce1fdfa37a1322d9bde3bba54f635b06e3e8f4ef9de8e0ed6c8b11d91cd6d2f56fa38a0f7a0425c8bc02889f3d138781baed107c8ee427146f2c53'
            'a46a2fea4b2c83e2569cdd343933bb991466752d3c28d70698b1c477134ac0db7d400e03ea569d4f2e73c3e98cc2b5760a7588faf85dc210c1f5786ad01f66ab'
            '748cd685447336ce0d43fca04dd489176777364030c2d0d24b782123c49b01bfd8e4c672a119478be81084db1637bd590b860b92fd2fd53c6259d7f3858448ff'
            '81c0774d94d2cec35e027ef07b5496bb8b188918f5fb1bb645a1302676f5a0ecda45c3ff695fa636e29db5d47361b5b97ba82e2ca1b6bc2037902ee7747bc32c')

validpgpkeys=(
              'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
              '647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman
             )