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