From a88f8c72e7deea5a77776fe8c42454bac5d3437d Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Tue, 16 Feb 2021 00:55:21 +0200
Subject: kbuild: Add --help argument

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 kbuild.sh | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/kbuild.sh b/kbuild.sh
index 3ec4856..3776e72 100755
--- a/kbuild.sh
+++ b/kbuild.sh
@@ -30,6 +30,25 @@ version=$(get_kernel_version)
 # Options parsing
 #
 
+usage() {
+	echo   "Usage: $(basename $1) [options] platform [make options]"
+	echo   ""
+	echo   "Supported options:"
+	echo   "--bootloader file	Boot loader file (CrOS images only)"
+	echo   "--cmdline		Command line arguments file (CrOS images only)"
+	echo   "--config		Run menuconfig"
+	echo   "--deb			Create Debian packages"
+	echo   "--defconfig file	Generate a new .config with defaults from file"
+	echo   "--doc[=dir]		Compile the documentation (for the specified dir only)"
+	echo   "-h, --help		Print this help text"
+	echo   "--			End options parsing, next argument is the platform"
+	echo   ""
+	echo   "Supported platforms:"
+	for f in $kbuild_root/platforms/*.sh ; do
+		echo "- $(basename -s .sh $f)"
+	done
+}
+
 do_compile_doc=0
 do_menu_config=0
 do_package_deb=0
@@ -81,6 +100,10 @@ while [[ $# != 0 ]] ; do
 			do_compile_doc=1
 			opt_doc_dirs="${option/--doc=/}"
 			;;
+		-h|--help)
+			usage $0
+			exit 1
+			;;
 		--)
 			platform=auto
 			;;
-- 
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