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recipes-kernel/linux/setup-defconfig.inc
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# KERNEL_LOCALVERSION can be set to add a tag to the end of the
# kernel version string. such as the commit id
KERNEL_LOCALVERSION ?= ""
# Check the defconfig file and see if it points to an in kernel
# defconfig that should be used, or if it is a complete config file
# Or if it points to a combined defconfig that lists both in kernel
# defconfig and associated config fragments.
do_configure() {
# Always copy the defconfig file to .config to keep consistency
# between the case where there is a real config and the in kernel
# tree config
cp ${WORKDIR}/defconfig ${B}/.config
echo ${KERNEL_LOCALVERSION} > ${B}/.scmversion
echo ${KERNEL_LOCALVERSION} > ${S}/.scmversion
# First, check if pointing to a combined config with config fragments
config=`cat ${B}/.config | grep use-combined-config | cut -d= -f2`
if [ -n "$config" ]
then
cp ${S}/$config ${B}/.config
fi
# Second, extract any config fragments listed in the defconfig
config=`cat ${B}/.config | grep config-fragment | cut -d= -f2`
if [ -n "$config" ]
then
configfrags=""
for f in $config
do
# Check if the config fragment is available
if [ ! -e "${S}/$f" ]
then
echo "Could not find kernel config fragment $f"
exit 1
else
# Sanitize config fragment files to be relative to sources
configfrags="$configfrags ${S}/$f"
fi
done
fi
# Third, check if pointing to a known in kernel defconfig
config=`cat ${B}/.config | grep use-kernel-config | cut -d= -f2`
if [ -n "$config" ]
then
oe_runmake -C ${S} O=${B} $config
else
yes '' | oe_runmake -C ${S} O=${B} oldconfig
fi
# Fourth, handle config fragments specified in the recipe
# The assumption is that the config fragment will be specified with the absolute path.
# E.g. ${WORKDIR}/config1.cfg or ${S}/config2.cfg
if [ -n "${KERNEL_CONFIG_FRAGMENTS}" ]
then
for f in ${KERNEL_CONFIG_FRAGMENTS}
do
# Check if the config fragment is available
if [ ! -e "$f" ]
then
echo "Could not find kernel config fragment $f"
exit 1
fi
done
fi
# Now that all the fragments are located merge them
if [ -n "${KERNEL_CONFIG_FRAGMENTS}" -o -n "$configfrags" ]
then
( cd ${WORKDIR} && ${S}/scripts/kconfig/merge_config.sh -m -r -O ${B} ${B}/.config $configfrags ${KERNEL_CONFIG_FRAGMENTS} 1>&2 )
yes '' | oe_runmake -C ${S} O=${B} oldconfig
fi
}
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