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# $Id: PKGBUILD 130991 2011-07-09 12:23:51Z thomas $
# Maintainer: Tobias Powalowski <tpowa@archlinux.org>
# Maintainer: Thomas Baechler <thomas@archlinux.org>
# Maintainer (Parabola): Nicolás Reynolds <fauno@kiwwwi.com.ar>
# Maintainer (Parabola): Sorin-Mihai Vârgolici <smv@yobicore.org>

pkgbase=linux-libre-xen
pkgname=('linux-libre-xen' 'linux-libre-xen-headers' 'linux-libre-xen-docs') # Build stock -LIBRE kernel
# pkgname=linux-custom       # Build kernel with a different name
_kernelname=${pkgname#linux-libre}
_basekernel=3.1
pkgver=${_basekernel}.5
pkgrel=1
arch=('i686' 'x86_64')
url="http://linux-libre.fsfla.org/"
license=('GPL2')
makedepends=('xmlto' 'docbook-xsl')
options=('!strip')
source=("http://linux-libre.fsfla.org/pub/linux-libre/releases/${_basekernel}-libre/linux-${_basekernel}-libre.tar.xz"
        "http://linux-libre.fsfla.org/pub/linux-libre/releases/${pkgver}-libre/patch-${_basekernel}-libre-${pkgver}-libre.xz"
        # the main kernel config files
        'config.i686' 'config.x86_64'
        # standard config files for mkinitcpio ramdisk
        "${pkgname}.preset"
        'boot-logo.patch'
        'change-default-console-loglevel.patch'
        'i915-fix-ghost-tv-output.patch'
        'i915-fix-incorrect-error-message.patch'
        'usb-add-reset-resume-quirk-for-several-webcams.patch')

build() {
  cd "${srcdir}/linux-${_basekernel}"

  patch -Np1 -i "${srcdir}/patch-${_basekernel}-libre-${pkgver}-libre"

  # Add freedo as boot logo
  patch -Np1 -i "${srcdir}/boot-logo.patch"

  # Some chips detect a ghost TV output
  # mailing list discussion: http://lists.freedesktop.org/archives/intel-gfx/2011-April/010371.html
  # Arch Linux bug report: FS#19234
  #
  # It is unclear why this patch wasn't merged upstream, it was accepted,
  # then dropped because the reasoning was unclear. However, it is clearly
  # needed.
  patch -Np1 -i "${srcdir}/i915-fix-ghost-tv-output.patch"

  # In 3.1.1, a DRM_DEBUG message is falsely declared as DRM_ERROR. This
  # worries users, as this message is displayed even at loglevel 4. Fix
  # this.
  patch -Np1 -i "${srcdir}/i915-fix-incorrect-error-message.patch"

  # Add the USB_QUIRK_RESET_RESUME for several webcams
  # FS#26528
  patch -Np1 -i "${srcdir}/usb-add-reset-resume-quirk-for-several-webcams.patch"

  # set DEFAULT_CONSOLE_LOGLEVEL to 4 (same value as the 'quiet' kernel param)
  # remove this when a Kconfig knob is made available by upstream
  # (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227)
  patch -Np1 -i "${srcdir}/change-default-console-loglevel.patch"

  cat "${srcdir}/config.${CARCH}" > ./.config # simpler

  if [ "${_kernelname}" != "" ]; then
    sed -i "s|CONFIG_LOCALVERSION=.*|CONFIG_LOCALVERSION=\"${_kernelname}\"|g" ./.config
  fi

  # set extraversion to pkgrel
  sed -ri "s|^(EXTRAVERSION =).*|\1 -${pkgrel}|" Makefile

  # get kernel version
  make prepare

  # load configuration
  # Configure the kernel. Replace the line below with one of your choice.
  #make menuconfig # CLI menu for configuration
  #make nconfig # new CLI menu for configuration
  #make xconfig # X-based configuration
  #make oldconfig # using old config from previous kernel version
  # ... or manually edit .config

  ####################
  # stop here
  # this is useful to configure the kernel
  #msg "Stopping build"
  #return 1
  ####################

  yes "" | make config

  # build!
  make ${MAKEFLAGS} bzImage modules
}

package_linux-libre-xen() {
  pkgdesc="The Linux-libre Kernel and modules"
  groups=('base')
  depends=('coreutils' 'module-init-tools>=3.16' 'mkinitcpio>=0.7')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=('kernel26' "linux=$pkgver")
  conflicts=('kernel26' 'kernel26-libre' 'linux')
  replaces=('kernel26' 'kernel26-libre' 'linux')
  backup=("etc/mkinitcpio.d/${pkgname}.preset")
  install=${pkgname}.install

  cd "${srcdir}/linux-${_basekernel}"

  KARCH=x86

  # get kernel version
  _kernver="$(make kernelrelease)"

  mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot}
  make INSTALL_MOD_PATH="${pkgdir}" modules_install
  cp arch/$KARCH/boot/bzImage "${pkgdir}/boot/vmlinuz-${pkgname}"

  # add vmlinux
  install -D -m644 vmlinux "${pkgdir}/usr/src/linux-${_kernver}/vmlinux"

  # install fallback mkinitcpio.conf file and preset file for kernel
  install -D -m644 "${srcdir}/${pkgname}.preset" "${pkgdir}/etc/mkinitcpio.d/${pkgname}.preset"

  # set correct depmod command for install
  sed \
    -e  "s/KERNEL_NAME=.*/KERNEL_NAME=${_kernelname}/g" \
    -e  "s/KERNEL_VERSION=.*/KERNEL_VERSION=${_kernver}/g" \
    -i "${startdir}/${pkgname}.install"
  sed \
    -e "s|ALL_kver=.*|ALL_kver=\"/boot/vmlinuz-${pkgname}\"|g" \
    -e "s|default_image=.*|default_image=\"/boot/initramfs-${pkgname}.img\"|g" \
    -e "s|fallback_image=.*|fallback_image=\"/boot/initramfs-${pkgname}-fallback.img\"|g" \
    -i "${pkgdir}/etc/mkinitcpio.d/${pkgname}.preset"

  # remove build and source links
  rm -f "${pkgdir}"/lib/modules/${_kernver}/{source,build}
  # remove the firmware
  rm -rf "${pkgdir}/lib/firmware"
  # gzip -9 all modules to save 100MB of space
  find "${pkgdir}" -name '*.ko' -exec gzip -9 {} \;
  # make room for external modules
  ln -s "../extramodules-${_basekernel}${_kernelname:--LIBRE}" "${pkgdir}/lib/modules/${_kernver}/extramodules"
  # add real version for building modules and running depmod from post_install/upgrade
  mkdir -p "${pkgdir}/lib/modules/extramodules-${_basekernel}${_kernelname:--LIBRE}"
  echo "${_kernver}" > "${pkgdir}/lib/modules/extramodules-${_basekernel}${_kernelname:--LIBRE}/version"
}

package_linux-libre-xen-headers() {
  pkgdesc="Header files and scripts for building modules for linux-libre kernel"
  provides=('kernel26-headers' "linux-headers=${pkgver}")
  conflicts=('kernel26-headers' 'kernel26-libre-headers' 'linux-headers')
  replaces=('kernel26-headers' 'kernel26-libre-headers' 'linux-headers')

  mkdir -p "${pkgdir}/lib/modules/${_kernver}"

  cd "${pkgdir}/lib/modules/${_kernver}"
  ln -sf ../../../usr/src/linux-${_kernver} build

  cd "${srcdir}/linux-${_basekernel}"
  install -D -m644 Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/Makefile"
  install -D -m644 kernel/Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/kernel/Makefile"
  install -D -m644 .config \
    "${pkgdir}/usr/src/linux-${_kernver}/.config"

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include"

  for i in acpi asm-generic config crypto drm generated linux math-emu \
    media net pcmcia scsi sound trace video xen; do
    cp -a include/${i} "${pkgdir}/usr/src/linux-${_kernver}/include/"
  done

  # copy arch includes for external modules
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/arch/x86"
  cp -a arch/x86/include "${pkgdir}/usr/src/linux-${_kernver}/arch/x86/"

  # copy files necessary for later builds
  cp Module.symvers "${pkgdir}/usr/src/linux-${_kernver}"
  cp -a scripts "${pkgdir}/usr/src/linux-${_kernver}"

  # fix permissions on scripts dir
  chmod og-w -R "${pkgdir}/usr/src/linux-${_kernver}/scripts"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/.tmp_versions"

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/kernel"

  cp arch/${KARCH}/Makefile "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/"

  if [ "${CARCH}" = "i686" ]; then
    cp arch/${KARCH}/Makefile_32.cpu "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/"
  fi

  cp arch/${KARCH}/kernel/asm-offsets.s "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/kernel/"

  # add headers for lirc package
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video"

  cp drivers/media/video/*.h  "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/"

  for i in bt8xx cpia2 cx25840 cx88 em28xx et61x251 pwc saa7134 sn9c102; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/${i}"
    cp -a drivers/media/video/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/${i}"
  done

  # add docbook makefile
  install -D -m644 Documentation/DocBook/Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/Documentation/DocBook/Makefile"

  # add dm headers
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/md"
  cp drivers/md/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/md"

  # add inotify.h
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include/linux"
  cp include/linux/inotify.h "${pkgdir}/usr/src/linux-${_kernver}/include/linux/"

  # add wireless headers
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/net/mac80211/"
  cp net/mac80211/*.h "${pkgdir}/usr/src/linux-${_kernver}/net/mac80211/"

  # add dvb headers for external modules
  # in reference to:
  # http://bugs.archlinux.org/task/9912
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-core"
  cp drivers/media/dvb/dvb-core/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-core/"
  # and...
  # http://bugs.archlinux.org/task/11194
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include/config/dvb/"
  cp include/config/dvb/*.h "${pkgdir}/usr/src/linux-${_kernver}/include/config/dvb/"

  # add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
  # in reference to:
  # http://bugs.archlinux.org/task/13146
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"
  cp drivers/media/dvb/frontends/lgdt330x.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"
  cp drivers/media/video/msp3400-driver.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"

  # add dvb headers
  # in reference to:
  # http://bugs.archlinux.org/task/20402
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-usb"
  cp drivers/media/dvb/dvb-usb/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-usb/"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends"
  cp drivers/media/dvb/frontends/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/common/tuners"
  cp drivers/media/common/tuners/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/common/tuners/"

  # add xfs and shmem for aufs building
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/fs/xfs"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/mm"
  cp fs/xfs/xfs_sb.h "${pkgdir}/usr/src/linux-${_kernver}/fs/xfs/xfs_sb.h"

  # copy in Kconfig files
  for i in `find . -name "Kconfig*"`; do
    mkdir -p "${pkgdir}"/usr/src/linux-${_kernver}/`echo ${i} | sed 's|/Kconfig.*||'`
    cp ${i} "${pkgdir}/usr/src/linux-${_kernver}/${i}"
  done

  chown -R root.root "${pkgdir}/usr/src/linux-${_kernver}"
  find "${pkgdir}/usr/src/linux-${_kernver}" -type d -exec chmod 755 {} \;

  # strip scripts directory
  find "${pkgdir}/usr/src/linux-${_kernver}/scripts" -type f -perm -u+w 2>/dev/null | while read binary ; do
    case "$(file -bi "${binary}")" in
      *application/x-sharedlib*) # Libraries (.so)
        /usr/bin/strip ${STRIP_SHARED} "${binary}";;
      *application/x-archive*) # Libraries (.a)
        /usr/bin/strip ${STRIP_STATIC} "${binary}";;
      *application/x-executable*) # Binaries
        /usr/bin/strip ${STRIP_BINARIES} "${binary}";;
    esac
  done

  # remove unneeded architectures
  rm -rf "${pkgdir}"/usr/src/linux-${_kernver}/arch/{alpha,arm,arm26,avr32,blackfin,cris,frv,h8300,ia64,m32r,m68k,m68knommu,mips,microblaze,mn10300,parisc,powerpc,ppc,s390,sh,sh64,sparc,sparc64,um,v850,xtensa}
}

package_linux-libre-xen-docs() {
  pkgdesc="Kernel hackers manual - HTML documentation that comes with the Linux-libre kernel."
  provides=('kernel26-docs' "linux-docs=$pkgver")
  conflicts=('kernel26-docs' 'kernel26-libre-docs' 'linux-docs')
  replaces=('kernel26-docs' 'kernel26-libre-docs' 'linux-docs')

  cd "${srcdir}/linux-${_basekernel}"

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}"
  cp -al Documentation "${pkgdir}/usr/src/linux-${_kernver}"
  find "${pkgdir}" -type f -exec chmod 444 {} \;
  find "${pkgdir}" -type d -exec chmod 755 {} \;

  # remove a file already in linux package
  rm -f "${pkgdir}/usr/src/linux-${_kernver}/Documentation/DocBook/Makefile"
}