kbuild: Properly decouple kernel image and DTBs compilation

Make it possible to build device tree sources only, separately from the
kernel image.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/kbuild.sh b/kbuild.sh
index 8f950b9..b457bb1 100755
--- a/kbuild.sh
+++ b/kbuild.sh
@@ -258,6 +258,11 @@ fi
 # Compile the kernel, modules and DTBs
 #
 
+build_targets=
+if [[ ${do_build[image]} == 1 ]] ; then
+	build_targets="$build_targets $image_kernel"
+fi
+
 kernel_dtbs=
 if [[ ${do_build[dt]} == 1 ]] ; then
 	for dtb in ${dtbs[@]} ; do
@@ -269,10 +274,12 @@ if [[ ${do_build[dt]} == 1 ]] ; then
 
 		kernel_dtbs="$kernel_dtbs $dtb"
 	done
+
+	build_targets="$build_targets $kernel_dtbs"
 fi
 
-if [[ ${do_build[image]} == 1 ]] ; then
-	$pmake $kbuild_options KCFLAGS="$kcflags" $image_kernel $kernel_dtbs
+if [[ -n $build_targets ]] ; then
+	$pmake $kbuild_options KCFLAGS="$kcflags" $build_targets
 fi
 
 grep 'CONFIG_MODULES=y' $output_dir/.config > /dev/null && modules=modules