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kernel: use debian build infrastructure to build kernels.

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This patch depends on kernel build infrastructure
mentioned in http://codereview.chromium.org/543194/show

Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

Review URL: http://codereview.chromium.org/553075
This commit is contained in:
Tim Gardner 2010-01-26 15:05:10 -07:00
parent c0921383c0
commit c7e05719c5
1 changed files with 37 additions and 75 deletions
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112
build_kernel.sh
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@ -19,14 +19,13 @@ SRC_ROOT=$(dirname $(readlink -f $(dirname "$0")))
. "${SRC_ROOT}/third_party/shflags/files/src/shflags" . "${SRC_ROOT}/third_party/shflags/files/src/shflags"
KERNEL_DIR="$SRC_ROOT/third_party/kernel" KERNEL_DIR="$SRC_ROOT/third_party/kernel"
DEFAULT_KCONFIG="${KERNEL_DIR}/files/chromeos/config/chromeos-intel-menlow" KERNEL_FDIR="$KERNEL_DIR/files"
DEFAULT_KFLAVOUR="chromeos-intel-menlow"
# Flags # Flags
DEFAULT_BUILD_ROOT=${BUILD_ROOT:-"${SRC_ROOT}/build"} DEFAULT_BUILD_ROOT=${BUILD_ROOT:-"${SRC_ROOT}/build"}
DEFINE_string config "${DEFAULT_KCONFIG}" \ DEFINE_string flavour "${DEFAULT_KFLAVOUR}" \
"The kernel configuration file to use." "The kernel flavour to build."
DEFINE_integer revision 002 \
"The package revision to use"
DEFINE_string output_root "${DEFAULT_BUILD_ROOT}/x86/local_packages" \ DEFINE_string output_root "${DEFAULT_BUILD_ROOT}/x86/local_packages" \
"Directory in which to place the resulting .deb package" "Directory in which to place the resulting .deb package"
DEFINE_string build_root "$DEFAULT_BUILD_ROOT" \ DEFINE_string build_root "$DEFAULT_BUILD_ROOT" \
@ -44,17 +43,26 @@ set -e
# an ARCH placeholder with the proper architecture rather than assuming x86. # an ARCH placeholder with the proper architecture rather than assuming x86.
mkdir -p "$FLAGS_output_root" mkdir -p "$FLAGS_output_root"
# Get kernel package configuration from repo. # Set up kernel source tree and prepare to start the compilation.
# TODO: Find a workaround for needing sudo for this. Maybe create a symlink # TODO: Decide on proper working directory when building kernels. It should
# to /tmp/kernel-pkg.conf when setting up the chroot env? # be somewhere under ${BUILD_ROOT}.
sudo cp "$KERNEL_DIR"/package/kernel-pkg.conf /etc/kernel-pkg.conf SRCDIR="${FLAGS_build_root}/kernels/kernel-${FLAGS_flavour}"
rm -rf "$SRCDIR"
mkdir -p "$SRCDIR"
cp -a "${KERNEL_FDIR}"/* "$SRCDIR"
cd "$SRCDIR"
#
# Build the config file
#
fakeroot debian/rules clean prepare-$FLAGS_flavour
# Parse kernel config file for target architecture information. This is needed # Parse kernel config file for target architecture information. This is needed
# to determine the full package name and also to setup the environment for # to setup the environment for kernel build scripts which use "uname -m" to autodetect architecture.
# kernel build scripts which use "uname -m" to autodetect architecture. KCONFIG="$SRCDIR/debian/build/build-$FLAGS_flavour/.config"
KCONFIG="$FLAGS_config"
if [ ! -f "$KCONFIG" ]; then if [ ! -f "$KCONFIG" ]; then
KCONFIG="$KERNEL_DIR"/files/chromeos/config/"$KCONFIG" echo Total bummer. No config file was created.
exit 1
fi fi
if [ -n $(grep 'CONFIG_X86=y' "$KCONFIG") ] if [ -n $(grep 'CONFIG_X86=y' "$KCONFIG") ]
then then
@ -71,77 +79,31 @@ fi
# Parse the config file for a line with "version" in it (in the header) # Parse the config file for a line with "version" in it (in the header)
# and remove any leading text before the major number of the kernel version # and remove any leading text before the major number of the kernel version
FULLVERSION=$(sed -e '/version/ !d' -e 's/^[^0-9]*//' $KCONFIG) FULLVERSION=$(dpkg-parsechangelog -l$SRCDIR/debian.chrome/changelog|grep "Version:"|sed 's/^Version: //')
# FULLVERSION should have the form "2.6.30-rc1-chromeos-asus-eeepc". In this # linux-image-2.6.31-0-chromeos-intel-menlow_2.6.31-0.1_i386.deb
# example MAJOR is 2, MINOR is 6, EXTRA is 30, RELEASE is rc1, LOCAL is # FULLVERSION has the form "2.6.3x-ABI-MINOR" where x is {1,2}, ABI and MINOR are an integers.
# asus-eeepc. RC is optional since it only shows up for release candidates. #In this example MAJOR is 2.6.31, ABI is 0, MINOR is 1
MAJOR=$(echo $FULLVERSION | sed -e 's/[^0-9].*//') MAJOR=$(echo $FULLVERSION | sed -e 's/\(^.*\)-.*$/\1/')
MIDDLE=$(echo $FULLVERSION | sed -e 's/[0-9].//' -e 's/[^0-9].*//') ABI=$(echo $FULLVERSION | sed 's/^.*-\(.*\)\..*$/\1/')
MINOR=$(echo $FULLVERSION | sed -e 's/[0-9].//' -e 's/[0-9].//' -e 's/[^0-9].*//') MINOR=$(echo $FULLVERSION | sed -e 's/^.*\.\([0-9]*$\)/\1/')
EXTRA=$(echo $FULLVERSION | sed -e 's/[0-9].//' -e 's/[0-9].//' -e 's/[0-9]*.//' -e 's/[^0-9].*//') PACKAGE="linux-image-${MAJOR}-${ABI}-${FLAGS_flavour}_${MAJOR}-${ABI}.${MINOR}_${ARCH}.deb"
if [ ! -z $EXTRA ]; then
VER_MME="${MAJOR}.${MIDDLE}.${MINOR}.${EXTRA}"
else
VER_MME="${MAJOR}.${MIDDLE}.${MINOR}"
fi
LOCAL=$(sed -e '/CONFIG_LOCALVERSION=/ !d' -e 's/.*="-//' -e 's/"//' $KCONFIG) echo MAJOR $MAJOR
RC=$(echo $FULLVERSION | sed -r \ echo ABI $ABI
"s/${VER_MME}-([^-]*)-*${LOCAL}/\1/") echo MINOR $MINOR
echo PACKAGE $PACKAGE
# The tag will be appended by make-kpkg to the extra version and will show up
# in both the kernel and package names.
CHROMEOS_TAG="chromeos"
PACKAGE="linux-image-${VER_MME}-${CHROMEOS_TAG}-${LOCAL}_${FLAGS_revision}_${ARCH}.deb"
# Set up kernel source tree and prepare to start the compilation. # Remove stale packages. debian/rules will dump the package in the parent
# TODO: Decide on proper working directory when building kernels. It should
# be somewhere under ${BUILD_ROOT}.
SRCDIR="${FLAGS_build_root}/kernels/kernel-${ARCH}-${LOCAL}"
rm -rf "$SRCDIR"
mkdir -p "$SRCDIR"
cd "$SRCDIR"
# Get kernel sources
# TODO(msb): uncomment once git is available in the chroot
# git clone "${KERNEL_DIR}"/linux_${VER_MME}
mkdir linux-${VER_MME}
cd "linux-$VER_MME"
cp -a "${KERNEL_DIR}"/files/* .
# Move kernel config to kernel source tree and rename to .config so that
# it can be used for "make oldconfig" by make-kpkg.
cp "$KCONFIG" .config
# Remove stale packages. make-kpkg will dump the package in the parent
# directory. From there, it will be moved to the output directory. # directory. From there, it will be moved to the output directory.
rm -f "../${PACKAGE}" rm -f "../${PACKAGE}"
rm -f "${FLAGS_output_root}"/linux-image-*.deb rm -f "${FLAGS_output_root}"/linux-image-*.deb
# Speed up compilation by running parallel jobs. # Build the kernel package.
if [ ! -e "/proc/cpuinfo" ] fakeroot debian/rules binary-debs flavours=${FLAGS_flavour}
then
# default to a reasonable level
CONCURRENCY_LEVEL=2
else
# speed up compilation by running #cpus * 2 simultaneous jobs
CONCURRENCY_LEVEL=$(($(grep -c "^processor" /proc/cpuinfo) * 2))
fi
# Build the kernel and make package. "setarch" is used so that scripts which # debian/rules dumps the newly created package in the parent directory
# detect architecture (like the "oldconfig" rule in kernel Makefile) don't get
# confused when cross-compiling.
make-kpkg clean
MAKEFLAGS="CONCURRENCY_LEVEL=$CONCURRENCY_LEVEL" \
setarch $ARCH make-kpkg \
--append-to-version="-$CHROMEOS_TAG" --revision="$FLAGS_revision" \
--arch="$ARCH" \
--rootcmd fakeroot \
--config oldconfig \
--initrd --bzImage kernel_image
# make-kpkg dumps the newly created package in the parent directory
if [ -e "../${PACKAGE}" ] if [ -e "../${PACKAGE}" ]
then then
mv "../${PACKAGE}" "${FLAGS_output_root}" mv "../${PACKAGE}" "${FLAGS_output_root}"