[PATCH] MAKEALL: add incremental build support

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

MAKEALL always deletes the build directory, before starting. Add a
command line option to make this configurable.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 MAKEALL | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/MAKEALL b/MAKEALL
index a4e268d54cf8..f2e774cf88be 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -53,6 +53,7 @@ usage() {
 	echo "LOGDIR      -l      log dir"
 	echo "REGEX       -e      regex"
 	echo "KCONFIG_ADD -k      kconfig fragment"
+	echo "INCREMENTAL -i"
 	echo ""
 }
 
@@ -89,7 +90,7 @@ do_build_target() {
 	local log_report="${LOGDIR}/${target}/report.log"
 	local log_err="${LOGDIR}/${target}/errors.log"
 
-	rm -rf "${BUILDDIR}"
+	[ "$INCREMENTAL" != "1" ] && rm -rf "${BUILDDIR}"
 	mkdir -p "${LOGDIR}/${target}"
 	printf "Building ${arch} ${target} \n" >&2 | tee -a "${log_report}"
 
@@ -196,7 +197,7 @@ do_build_all() {
 	return $build_target
 }
 
-while getopts "hc:j:O:l:a:e:k:" Option
+while getopts "hc:j:O:l:a:e:k:i" Option
 do
 case $Option in
 	a )
@@ -220,6 +221,9 @@ case $Option in
 	k )
 		KCONFIG_ADD="${KCONFIG_ADD} ${OPTARG}"
 		;;
+	i )
+		INCREMENTAL=1
+		;;
 	h )
 		usage
 		exit 0
-- 
2.39.2