meta-blackfinn: Unify layer structure

Signed-off-by: Thomas Klaehn <tkl@blackfinn.de>

buildconf/blackfinn-init-build-env

@@ -0,0 +1,56 @@
+function print_help {
+	echo ""
+	echo "Prepare environment for blackfinn-based yocto builds."
+	echo ""
+	echo "Usage:"
+	echo "MACHINE=<my_machine> source blackfinn-init-build-env <build_dir>"
+	echo ""
+	echo "MACHINE is optional. if not specified it defaults to 'qemuarm-64'."
+	echo "Supported machines:"
+	echo -e "\tqemuarm\n\tqemuarm64\n\tqemumips\n\tqemumips64\n\tqemuppc"
+	echo -e "\tqemux86\n\tqemux86-64\n"
+	echo -e "\tbeaglebone-yocto\n\tedgerouter\n\tgenericx86\n\tgenericx86-64\n\tmpc8315e-rdb\n"
+	echo -e "\traspberrypi3-64\n\tbananapi-m3"
+	echo ""
+	echo "<build_dir> is optional. If not specified it defaults to 'build'."
+	echo ""
+}
+
+function print_config {
+	echo "Configuration:"
+	echo "      MACHINE: $1"
+        echo "    BUILD_DIR: $2"
+}
+
+
+DEFAULT_MACHINE=qemux86-64
+BUILD_DIR=build
+
+#print_help
+
+if [ -z "$MACHINE" ]; then
+	MACH=$DEFAULT_MACHINE
+else
+	MACH=$MACHINE
+fi
+
+unset MACHINE
+
+if [ $# -eq "1" ]; then
+	BUILD_DIR=$1
+fi
+
+print_config $MACH $BUILD_DIR
+
+rm -f	build/conf/bblayers.conf \
+	build/conf/templateconf.cfg
+
+mkdir -p $BUILD_DIR
+
+export MACHINE=$MACH
+export TEMPLATECONF="../meta-blackfinn/buildconf/$MACHINE"
+
+source layers/poky/oe-init-build-env $BUILD_DIR
+
+return 0
+