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#!/bin/bash
#
# This script merges together the hierarchy of CONFIG_* files under generic
# and debug to form the necessary $PACKAGE_NAME<version>-<arch>-<variant>.config
# files for building RHEL kernels, based on the contents of a control file
PACKAGE_NAME=kernel # defines the package name used
set errexit
set nounset
control_file="config_generation"
function combine_config_layer()
{
dir=$1
file="config-$(echo $dir | sed -e 's|/|-|g')"
if [ $(ls $dir/ | grep -c "^CONFIG_") -eq 0 ]; then
touch $file
return
fi
cat $dir/CONFIG_* > $file
}
function merge_configs()
{
archvar=$1
arch=$(echo "$archvar" | cut -f1 -d"-")
configs=$2
name=$PACKAGE_NAME-$archvar.config
echo -n "Building $name ... "
touch config-merging config-merged
for config in $(echo $configs | sed -e 's/:/ /g')
do
perl merge.pl config-$config config-merging > config-merged
if [ ! $? -eq 0 ]; then
exit
fi
mv config-merged config-merging
done
if [ "x$arch" == "xaarch64" ]; then
echo "# arm64" > $name
elif [ "x$arch" == "xppc64" ]; then
echo "# powerpc" > $name
elif [ "x$arch" == "xppc64le" ]; then
echo "# powerpc" > $name
elif [ "x$arch" == "xs390x" ]; then
echo "# s390" > $name
elif [ "x$arch" == "xarmv7hl" ]; then
echo "# arm" > $name
elif [ "x$arch" == "xi686" ]; then
echo "# i386" > $name
else
echo "# $arch" > $name
fi
sort config-merging >> $name
rm -f config-merged config-merging
echo "done"
}
glist=$(find baseconfig -type d)
dlist=$(find debugconfig -type d)
for d in $glist $dlist
do
combine_config_layer $d
done
while read line
do
if [ $(echo "$line" | grep -c "^#") -ne 0 ]; then
continue
elif [ $(echo "$line" | grep -c "^$") -ne 0 ]; then
continue
else
arch=$(echo "$line" | cut -f1 -d"=")
configs=$(echo "$line" | cut -f2 -d"=")
if [ -n "$SUBARCH" -a "$SUBARCH" != "$arch" ]; then
continue
fi
merge_configs $arch $configs
fi
done < $control_file
rm -f config-*
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