configs: Create symlinks to used scripts

As part of the config re-organization, put the scripts needed to create
the config files in the configs/ directory.  At the top level create
symlinks for those scripts.  This allows the kernel.spec file to find
the scripts it needs and work correctly.

No code changes.

2 files changed, 125 insertions, 0 deletions

diff --git a/configs/build_configs.sh b/configs/build_configs.sh
new file mode 100755
index 000000000..140511f19
--- /dev/null
+++ b/configs/build_configs.sh
@@ -0,0 +1,89 @@
+#!/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-*
diff --git a/configs/config_generation b/configs/config_generation
new file mode 100644
index 000000000..64ae444f4
--- /dev/null
+++ b/configs/config_generation
@@ -0,0 +1,36 @@
+# config-variant=config:config:config
+# kernel.config files are build on the fly based on this config,
+# the first arg is arch and variant, the second is a hierarchy of
+# config options, lowest priority to highest
+
+# x86_64
+x86_64=baseconfig:baseconfig-x86:baseconfig-x86-x86_64
+x86_64-debug=baseconfig:baseconfig-x86:baseconfig-x86-x86_64:debugconfig:debugconfig-x86:debugconfig-x86-x86_64
+
+# i686
+i686=baseconfig:baseconfig-x86:baseconfig-x86-i686
+i686-debug=baseconfig:baseconfig-x86:baseconfig-x86-i686:debugconfig:debugconfig-x86
+i686-PAE=baseconfig:baseconfig-x86:baseconfig-x86-i686PAE
+i686-PAEdebug=baseconfig:baseconfig-x86:baseconfig-x86-i686PAE:debugconfig:debugconfig-x86
+
+# ppc64
+ppc64=baseconfig:baseconfig-powerpc:baseconfig-powerpc-powerpc64
+ppc64-debug=baseconfig:baseconfig-powerpc:baseconfig-powerpc-powerpc64:debugconfig
+
+# ppc64le
+ppc64le=baseconfig:baseconfig-powerpc:baseconfig-powerpc-powerpc64le
+ppc64le-debug=baseconfig:baseconfig-powerpc:baseconfig-powerpc-powerpc64le:debugconfig
+
+# s390x
+s390x=baseconfig:baseconfig-s390x
+s390x-debug=baseconfig:baseconfig-s390x:debugconfig
+
+# aarch64
+aarch64=baseconfig:baseconfig-arm:baseconfig-arm-arm64
+aarch64-debug=baseconfig:baseconfig-arm:baseconfig-arm-arm64:debugconfig:debugconfig-arm
+
+# arm
+armv7hl=baseconfig:baseconfig-arm:baseconfig-arm-armv7:baseconfig-arm-armv7-armv7
+armv7hl-debug=baseconfig:baseconfig-arm:baseconfig-arm-armv7:baseconfig-arm-armv7-armv7:debugconfig:debugconfig-arm
+armv7hl-lpae=baseconfig:baseconfig-arm:baseconfig-arm-armv7:baseconfig-arm-armv7-lpae
+armv7hl-lpae-debug=baseconfig:baseconfig-arm:baseconfig-arm-armv7:baseconfig-arm-armv7-lpae:debugconfig:debugconfig-arm