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+# Maintainer: jc_gargma <jc_gargma@iserlohn-fortress.net>
+# Maintainer (Arch): Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
+# Maintainer (Arch): Tobias Powalowski <tpowa@archlinux.org>
+# Maintainer (Arch): Thomas Baechler <thomas@archlinux.org>
+# Contributor: Aqua-sama <aqua@iserlohn-fortress.net>
+
+# # I maintain this because:
+# Arch version patch script does not apply consistently
+# Arch version lacks ath9k, greysky2, and raid6 patches
+# Arch version lacks ck patches
+# Arch version allows SM3 and SM4
+# Arch version is 300 Hz
+# Arch version supports Intel ME
+# Arch version is not configured for openrc
+# Arch version builds docs using python and graphviz
+# Arch version uses git
+
+pkgbase=linux-ck
+_majver=5.0
+_minver=4
+pkgver=${_majver}.${_minver}
+_ckpatchversion=1
+_ckpatch="patch-${_majver}-ck${_ckpatchversion}"
+_gcc_more_v='20180509'
+_srcname=linux-${pkgver}
+pkgrel=1
+url='https://kernel.org'
+#url='http://ck.kolivas.org/patches/'
+arch=('x86_64')
+license=('GPL2')
+makedepends=('xmlto' 'kmod' 'inetutils' 'bc' 'libelf')
+conflicts=('linux-libre')
+options=('!strip')
+source=(https://www.kernel.org/pub/linux/kernel/v5.x/linux-${pkgver}.tar.xz
+        https://www.kernel.org/pub/linux/kernel/v5.x/linux-${pkgver}.tar.sign
+        #http://ck.kolivas.org/patches/5.0/${_majver}/${_majver}-ck${_ckpatchversion}/${_ckpatch}.xz
+        ${_ckpatch}.patch
+        enable_additional_cpu_optimizations-$_gcc_more_v.tar.gz::https://github.com/graysky2/kernel_gcc_patch/archive/$_gcc_more_v.tar.gz
+        0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch
+        0002-netfilter-nf_tables-fix-set-double-free-in-abort-pat.patch
+        ath9k-regdom-hack.patch
+        raid6-default-algo.patch
+        config.x86_64  # the main kernel config files
+        60-linux.hook  # pacman hook for depmod
+        90-linux.hook  # pacman hook for initramfs regeneration
+        linux.preset   # standard config files for mkinitcpio ramdisk
+)
+sha256sums=('8f853aa05c496e27452da5e0ca74c56fab447cb2c24f047c55fd1d13d8bdea68'
+            'SKIP'
+            '1d8d8963d44aa8aeedc5a2ee531e197b3b51659772b871ccdd2d5dafed83f52b'
+            '226e30068ea0fecdb22f337391385701996bfbdba37cdcf0f1dbf55f1080542d'
+            '91fafa76bf9cb32159ac7f22191b3589278b91e65bc4505cf2fc6013b8037bf3'
+            '87e88d199d8e9beb89d8e5f7ce6a4bf8db18ccec169323c9b6fda563719d76ba'
+            'e7ebf050c22bcec0028c0b3c79fd6d3913b0370ecc6a23dfe78ce475630cf503'
+            '0f81d6e4158b7beeb0eb514f1b9401f7e23699cb0f7b0d513e25dae1815daaeb'
+            '888b73cbcfa16f1990f66b21d38d617ee884d1756cbe771c8911bd8730ff8ed1'
+            'ae2e95db94ef7176207c690224169594d49445e04249d2499e9d2fbc117a0b21'
+            '75f99f5239e03238f88d1a834c50043ec32b1dc568f2cc291b07d04718483919'
+            'ad6344badc91ad0630caacde83f7f9b97276f80d26a20619a87952be65492c65')
+validpgpkeys=(
+              'ABAF11C65A2970B130ABE3C479BE3E4300411886' # Linus Torvalds
+              '647F28654894E3BD457199BE38DBBDC86092693E' # Greg Kroah-Hartman
+              '8218F88849AAC522E94CF470A5E9288C4FA415FA' # Jan Alexander Steffens (heftig)
+)
+
+_kernelname=${pkgbase#linux}
+
+prepare() {
+  cd $_srcname
+
+#  # add upstream patch
+#  msg2 "Applying upstream patch"
+#  patch -Np1 < ../patch-${_majver}-${_pkgver}
+
+  # Hotfixes
+  # msg2 "Applying hotfixes"
+
+  # ck patch
+  msg2 "Applying ck patch"
+  patch -p1 -i ../${_ckpatch}.patch
+
+  # graysky2 gcc patch
+  msg2 "Applying graysky2 cpu patch"
+  patch -p1 -i ../kernel_gcc_patch-${_gcc_more_v}/enable_additional_cpu_optimizations_for_gcc_v8.1+_kernel_v4.13+.patch
+
+  # 0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch
+  msg2 "Applying disallow-unpriv-clone-newuser patch"
+  patch -p1 -i ../0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch
+
+  # 0002-netfilter-nf_tables-fix-set-double-free-in-abort-pat.patch
+  msg " Applying nftables-double-free patch"
+  patch -p1 -i ../0002-netfilter-nf_tables-fix-set-double-free-in-abort-pat.patch
+
+  # Ignore ath9k eeprom patch
+  msg2 "Applying ath9k patch"
+  patch -p1 -i ../ath9k-regdom-hack.patch
+
+  # Set default raid6 algo patch
+  msg " Applying raid6 patch"
+  patch -p1 -i ../raid6-default-algo.patch
+
+
+  msg2 "Setting version..."
+  scripts/setlocalversion --save-scmversion
+  echo "-$pkgrel" > localversion.10-pkgrel
+  echo "$_kernelname" > localversion.20-pkgname
+
+
+  msg2 "Setting config..."
+  # we are in src/linux-x.yy.zz, looking for a config next to the pkgbuild
+  if [ -f ${SRCDEST}/config.ck.previous ]; then
+    cp ${SRCDEST}/config.ck.previous .config
+  else
+    cp ../config.x86_64 .config
+  fi
+
+  make olddefconfig
+
+  make menuconfig
+
+  # Remove sublevel when no sublevel exists
+  # sed -i '/SUBLEVEL = 0/d' Makefile
+
+  make -s kernelrelease > ../version
+
+  # workaround for make -s kernelrelease not applying
+  # localversion to version when changed using menuconfig
+  grep -Po '(?<=CONFIG_LOCALVERSION=").*(?=")' .config > ../localversion
+  echo "$pkgver" > ../version.temp
+  cat "localversion.10-pkgrel" >> ../version.temp
+  cat "localversion.20-pkgname" >> ../version.temp
+  cat ../localversion >> ../version.temp
+  cat ../version.temp | tr -d "\n" > ../version
+
+  # back up the config
+  msg2 "Backing up config..."
+  cp .config ${SRCDEST}/config.ck.previous
+
+  msg2 "Prepared %s version %s" "$pkgbase" "$(<../version)"
+}
+
+build() {
+  cd $_srcname
+  make bzImage modules
+}
+
+_package() {
+  pkgdesc="The ${pkgbase/linux/Linux} kernel and modules"
+  [[ $pkgbase = linux ]] && groups=(base)
+  depends=(coreutils linux-firmware kmod mkinitcpio)
+  optdepends=('crda: to set the correct wireless channels of your country')
+  backup=("etc/mkinitcpio.d/$pkgbase.preset")
+  install=linux.install
+
+  local kernver="$(<version)"
+  local modulesdir="$pkgdir/usr/lib/modules/$kernver"
+
+  cd $_srcname
+
+  msg2 "Installing boot image..."
+  install -Dm644 "$(make -s image_name)" "$pkgdir/boot/vmlinuz-$pkgbase"
+
+  msg2 "Installing modules..."
+  mkdir -p "$modulesdir"
+  make INSTALL_MOD_PATH="$pkgdir/usr" modules_install
+
+  # a place for external modules,
+  # with version file for building modules and running depmod from hook
+  local extramodules="extramodules$_kernelname"
+  local extradir="$pkgdir/usr/lib/modules/$extramodules"
+  install -Dt "$extradir" -m644 ../version
+  ln -sr "$extradir" "$modulesdir/extramodules"
+
+  # remove build and source links
+  rm "$modulesdir"/{source,build}
+
+  msg2 "Installing hooks..."
+  # sed expression for following substitutions
+  local subst="
+    s|%PKGBASE%|$pkgbase|g
+    s|%KERNVER%|$kernver|g
+    s|%EXTRAMODULES%|$extramodules|g
+  "
+
+  # hack to allow specifying an initially nonexisting install file
+  sed "$subst" "$startdir/$install" > "$startdir/$install.pkg"
+  true && install=$install.pkg
+
+  # fill in mkinitcpio preset and pacman hooks
+  sed "$subst" ../linux.preset | install -Dm644 /dev/stdin \
+    "$pkgdir/etc/mkinitcpio.d/$pkgbase.preset"
+  sed "$subst" ../60-linux.hook | install -Dm644 /dev/stdin \
+    "$pkgdir/usr/share/libalpm/hooks/60-$pkgbase.hook"
+  sed "$subst" ../90-linux.hook | install -Dm644 /dev/stdin \
+    "$pkgdir/usr/share/libalpm/hooks/90-$pkgbase.hook"
+
+  msg2 "Fixing permissions..."
+  chmod -Rc u=rwX,go=rX "$pkgdir"
+}
+
+_package-headers() {
+  pkgdesc="Header files and scripts for building modules for ${pkgbase/linux/Linux} kernel"
+
+  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
+
+  cd $_srcname
+
+  msg2 "Installing build files..."
+  install -Dt "$builddir" -m644 Makefile .config Module.symvers System.map vmlinux
+  install -Dt "$builddir/kernel" -m644 kernel/Makefile
+  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
+  cp -t "$builddir" -a scripts
+
+  # add objtool for external module building and enabled VALIDATION_STACK option
+  if [[ -e tools/objtool/objtool ]]; then
+    install -Dt "$builddir/tools/objtool" tools/objtool/objtool
+  fi
+
+  # add xfs and shmem for aufs building
+  mkdir -p "$builddir"/{fs/xfs,mm}
+
+  # ???
+  mkdir "$builddir/.tmp_versions"
+
+  msg2 "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 "$builddir/net/mac80211" -m644 net/mac80211/*.h
+
+  # http://bugs.archlinux.org/task/13146
+  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h
+
+  # http://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 "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h
+
+  msg2 "Installing KConfig files..."
+  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;
+
+  msg2 "Removing unneeded architectures..."
+  local arch
+  for arch in "$builddir"/arch/*/; do
+    [[ $arch = */x86/ ]] && continue
+    echo "Removing $(basename "$arch")"
+    rm -r "$arch"
+  done
+
+  msg2 "Removing documentation..."
+  rm -r "$builddir/Documentation"
+
+  msg2 "Removing broken symlinks..."
+  find -L "$builddir" -type l -printf 'Removing %P\n' -delete
+
+  msg2 "Removing loose objects..."
+  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete
+
+  msg2 "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 "$builddir" -type f -perm -u+x ! -name vmlinux -print0)
+
+  msg2 "Adding symlink..."
+  mkdir -p "$pkgdir/usr/src"
+  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase-$pkgver"
+
+  msg2 "Fixing permissions..."
+  chmod -Rc u=rwX,go=rX "$pkgdir"
+}
+
+pkgname=("$pkgbase" "$pkgbase-headers")
+for _p in "${pkgname[@]}"; do
+  eval "package_$_p() {
+    $(declare -f "_package${_p#$pkgbase}")
+    _package${_p#$pkgbase}
+  }"
+done
+
+# vim:set ts=8 sts=2 sw=2 et: