commit 97890e3484b559c9d1f7cc0b2a443e82823f8d40
author LuK1337 <priv.luk@gmail.com> Tue Aug 01 19:59:14 2023 +0200
committer Jackeagle <jackeagle102@gmail.com> Wed Aug 02 22:22:30 2023 -0400
tree 95680d9e2c0098bdd39e4f6272690408ab716a56
parent 826cbec33339056f03f1b5cd535c1171915365de

kernel: Don't try to do math on empty kernel version

Fixes the following error message when compiling target w/o kernel src:
expr: syntax error: unexpected argument ‘5’

Test: lunch lineage_sdk_phone_x86_64-eng
Change-Id: Ib3ec41d9dc2b59ddc9ee3c0c8e3813c4defcfc3e

config/BoardConfigKernel.mk

diff --git a/config/BoardConfigKernel.mk b/config/BoardConfigKernel.mk
index c372895..f584046 100644
--- a/config/BoardConfigKernel.mk
+++ b/config/BoardConfigKernel.mk
@@ -74,9 +74,11 @@
 TARGET_KERNEL_VERSION ?= $(shell echo $(KERNEL_VERSION)"."$(KERNEL_PATCHLEVEL))
 
 # 5.10+ can fully compile without GCC by default
-ifeq ($(shell expr $(KERNEL_VERSION) \>= 5), 1)
-    ifeq ($(shell expr $(KERNEL_PATCHLEVEL) \>= 10), 1)
-        TARGET_KERNEL_NO_GCC ?= true
+ifneq ($(KERNEL_VERSION),)
+    ifeq ($(shell expr $(KERNEL_VERSION) \>= 5), 1)
+        ifeq ($(shell expr $(KERNEL_PATCHLEVEL) \>= 10), 1)
+            TARGET_KERNEL_NO_GCC ?= true
+        endif
     endif
 endif