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S = "${WORKDIR}/linux"
# remove tasks that modify the source tree in case externalsrc is inherited
SRCTREECOVEREDTASKS += "do_kernel_link_vmlinux do_kernel_configme do_validate_branches do_kernel_configcheck do_kernel_checkout do_patch"
# returns local (absolute) path names for all valid patches in the
# src_uri
def find_patches(d):
patches=src_patches(d)
patch_list=[]
for p in patches:
_, _, local, _, _, _ = bb.decodeurl(p)
patch_list.append(local)
return patch_list
# returns all the elements from the src uri that are .scc files
def find_sccs(d):
sources=src_patches(d, True)
sources_list=[]
for s in sources:
base, ext = os.path.splitext(os.path.basename(s))
if ext and ext in ('.scc' '.cfg'):
sources_list.append(s)
elif base and base in 'defconfig':
sources_list.append(s)
return sources_list
# this is different from find_patches, in that it returns a colon separated
# list of <patches>:<subdir> instead of just a list of patches
def find_urls(d):
patches=src_patches(d)
fetch = bb.fetch2.Fetch([], d)
patch_list=[]
for p in patches:
_, _, local, _, _, _ = bb.decodeurl(p)
for url in fetch.urls:
urldata = fetch.ud[url]
if urldata.localpath == local:
patch_list.append(local+':'+urldata.path)
return patch_list
do_patch() {
cd ${S}
if [ -f ${WORKDIR}/defconfig ]; then
defconfig=${WORKDIR}/defconfig
fi
# if kernel tools are available in-tree, they are preferred
# and are placed on the path before any external tools. Unless
# the external tools flag is set, in that case we do nothing.
if [ -f "${S}/scripts/util/configme" ]; then
if [ -z "${EXTERNAL_KERNEL_TOOLS}" ]; then
PATH=${S}/scripts/util:${PATH}
fi
fi
kbranch=${KBRANCH}
if [ -n "${YOCTO_KERNEL_EXTERNAL_BRANCH}" ]; then
# switch from a generic to a specific branch
kbranch=${YOCTO_KERNEL_EXTERNAL_BRANCH}
fi
# simply ensures that a branch of the right name has been created
if [ -n "${YOCTO_KERNEL_META_DATA}" ]; then
createme_flags="--disable-meta-gen"
fi
createme ${createme_flags} ${ARCH} ${kbranch} ${defconfig}
if [ $? -ne 0 ]; then
echo "ERROR. Could not create ${kbranch}"
exit 1
fi
sccs="${@" ".join(find_sccs(d))}"
patches="${@" ".join(find_patches(d))}"
set +e
# add any explicitly referenced features onto the end of the feature
# list that is passed to the kernel build scripts.
if [ -n "${KERNEL_FEATURES}" ]; then
for feat in ${KERNEL_FEATURES}; do
addon_features="$addon_features --feature $feat"
done
fi
# updates or generates the target description
updateme --branch ${kbranch} -DKDESC=${KMACHINE}:${LINUX_KERNEL_TYPE} \
${addon_features} ${ARCH} ${KMACHINE} ${sccs} ${patches}
if [ $? -ne 0 ]; then
echo "ERROR. Could not update ${kbranch}"
exit 1
fi
# executes and modifies the source tree as required
patchme ${kbranch}
if [ $? -ne 0 ]; then
echo "ERROR. Could not modify ${kbranch}"
exit 1
fi
}
do_kernel_checkout() {
set +e
# A linux yocto SRC_URI should use the bareclone option. That
# ensures that all the branches are available in the WORKDIR version
# of the repository. If it wasn't passed, we should detect it, and put
# out a useful error message
if [ -d "${WORKDIR}/git/" ] && [ -d "${WORKDIR}/git/.git" ]; then
# we build out of {S}, so ensure that ${S} is clean and present
rm -rf ${S}
mkdir -p ${S}/.git
echo "WARNING. ${WORKDIR}/git is not a bare clone."
echo "Ensure that the SRC_URI includes the 'bareclone=1' option."
# we can fix up the kernel repository, but at the least the meta
# branch must be present. The machine branch may be created later.
mv ${WORKDIR}/git/.git ${S}
rm -rf ${WORKDIR}/git/
cd ${S}
if [ -n "${YOCTO_KERNEL_META_DATA}" ] && [ -n "${KMETA}" ]; then
git branch -a | grep -q ${KMETA}
if [ $? -ne 0 ]; then
echo "ERROR. The branch '${KMETA}' is required and was not"
echo "found. Ensure that the SRC_URI points to a valid linux-yocto"
echo "kernel repository"
exit 1
fi
fi
if [ -z "${YOCTO_KERNEL_EXTERNAL_BRANCH}" ] && [ -n "${KBRANCH}" ] ; then
git branch -a | grep -q ${KBRANCH}
if [ $? -ne 0 ]; then
echo "ERROR. The branch '${KBRANCH}' is required and was not"
echo "found. Ensure that the SRC_URI points to a valid linux-yocto"
echo "kernel repository"
exit 1
fi
fi
fi
if [ -d "${WORKDIR}/git/" ] && [ ! -d "${WORKDIR}/git/.git" ]; then
# we build out of {S}, so ensure that ${S} is clean and present
rm -rf ${S}
mkdir -p ${S}/.git
mv ${WORKDIR}/git/* ${S}/.git
rm -rf ${WORKDIR}/git/
cd ${S}
git config core.bare false
fi
# end debare
# convert any remote branches to local tracking ones
for i in `git branch -a | grep remotes | grep -v HEAD`; do
b=`echo $i | cut -d' ' -f2 | sed 's%remotes/origin/%%'`;
git show-ref --quiet --verify -- "refs/heads/$b"
if [ $? -ne 0 ]; then
git branch $b $i > /dev/null
fi
done
# Create a working tree copy of the kernel by checkout out a branch
git show-ref --quiet --verify -- "refs/heads/${KBRANCH}"
if [ $? -eq 0 ]; then
# checkout and clobber and unimportant files
git checkout -f ${KBRANCH}
else
echo "Not checking out ${KBRANCH}, it will be created later"
git checkout -f master
fi
}
do_kernel_checkout[dirs] = "${S}"
addtask kernel_checkout before do_patch after do_unpack
do_kernel_configme[dirs] = "${CCACHE_DIR} ${S} ${B}"
do_kernel_configme() {
echo "[INFO] doing kernel configme"
if [ -n ${KCONFIG_MODE} ]; then
configmeflags=${KCONFIG_MODE}
else
# If a defconfig was passed, use =n as the baseline, which is achieved
# via --allnoconfig
if [ -f ${WORKDIR}/defconfig ]; then
configmeflags="--allnoconfig"
fi
fi
cd ${S}
PATH=${PATH}:${S}/scripts/util
configme ${configmeflags} --reconfig --output ${B} ${KBRANCH} ${KMACHINE}
if [ $? -ne 0 ]; then
echo "ERROR. Could not configure ${KMACHINE}-${LINUX_KERNEL_TYPE}"
exit 1
fi
echo "# Global settings from linux recipe" >> ${B}/.config
echo "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\" >> ${B}/.config
}
python do_kernel_configcheck() {
import bb, re, string, sys, commands
bb.plain("NOTE: validating kernel configuration")
pathprefix = "export PATH=%s:%s; " % (d.getVar('PATH', True), "${S}/scripts/util/")
cmd = d.expand("cd ${B}/..; kconf_check -config- ${B} ${S} ${B} ${KBRANCH}")
ret, result = commands.getstatusoutput("%s%s" % (pathprefix, cmd))
bb.plain( "%s" % result )
}
# Ensure that the branches (BSP and meta) are on the locatios specified by
# their SRCREV values. If they are NOT on the right commits, the branches
# are reset to the correct commit.
do_validate_branches() {
cd ${S}
# nothing to do if bootstrapping
if [ -n "${YOCTO_KERNEL_EXTERNAL_BRANCH}" ]; then
return
fi
# nothing to do if SRCREV is AUTOREV
if [ "${SRCREV_machine}" = "AUTOINC" ]; then
# restore the branch for builds
git checkout -f ${KBRANCH}
return
fi
branch_head=`git show-ref -s --heads ${KBRANCH}`
meta_head=`git show-ref -s --heads ${KMETA}`
target_branch_head="${SRCREV_machine}"
target_meta_head="${SRCREV_meta}"
current=`git branch |grep \*|sed 's/^\* //'`
if [ -n "$target_branch_head" ] && [ "$branch_head" != "$target_branch_head" ]; then
if [ -n "${KERNEL_REVISION_CHECKING}" ]; then
ref=`git show ${target_meta_head} 2>&1 | head -n1 || true`
if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
echo "ERROR ${target_branch_head} is not a valid commit ID."
echo "The kernel source tree may be out of sync"
exit 1
else
echo "Forcing branch $current to ${target_branch_head}"
git branch -m $current $current-orig
git checkout -b $current ${target_branch_head}
fi
fi
fi
if [ "$meta_head" != "$target_meta_head" ]; then
if [ -n "${KERNEL_REVISION_CHECKING}" ]; then
ref=`git show ${target_meta_head} 2>&1 | head -n1 || true`
if [ "$ref" = "fatal: bad object ${target_meta_head}" ]; then
echo "ERROR ${target_meta_head} is not a valid commit ID"
echo "The kernel source tree may be out of sync"
exit 1
else
echo "Forcing branch meta to ${target_meta_head}"
git branch -m ${KMETA} ${KMETA}-orig
git checkout -b ${KMETA} ${target_meta_head}
fi
fi
fi
# restore the branch for builds
git checkout -f ${KBRANCH}
}
# Many scripts want to look in arch/$arch/boot for the bootable
# image. This poses a problem for vmlinux based booting. This
# task arranges to have vmlinux appear in the normalized directory
# location.
do_kernel_link_vmlinux() {
if [ ! -d "${B}/arch/${ARCH}/boot" ]; then
mkdir ${B}/arch/${ARCH}/boot
fi
cd ${B}/arch/${ARCH}/boot
ln -sf ../../../vmlinux
}
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