From 84b1eacc328baad3ceb63505ac588022620a05f6 Mon Sep 17 00:00:00 2001
From: James Hilliard <james.hilliard1@gmail.com>
Date: Mon, 4 Apr 2022 19:20:59 -0600
Subject: [PATCH] linux/linux.mk: ensure custom kernel version is set

Validate that BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE is set when
required.

Fixes:
http://autobuild.buildroot.net/results/117/117c08e414776202446a9fdb96d084aa3c16af48

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
---
 linux/linux.mk | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/linux/linux.mk b/linux/linux.mk
index 102b7a15d4..7ff7b05042 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -566,6 +566,12 @@ endif
 
 ifeq ($(BR_BUILDING),y)
 
+ifeq ($(BR2_LINUX_KERNEL_CUSTOM_VERSION),y)
+ifeq ($(LINUX_VERSION),)
+$(error No custom kernel version set. Check your BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE setting)
+endif
+endif
+
 ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
 # We must use the user-supplied kconfig value, because
 # LINUX_KCONFIG_DEFCONFIG will at least contain the