From f92df1d82244894ee6137e41572a73684bc8fdfb Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 9 Jun 2023 10:58:47 +0200
Subject: cmake: Make missing Module.symvers a warning

Since on github, we just compile against downloaded sources without
having a matching built kernel, a missing Module.symvers breaks the
action. While the resulting built kernel module might not be of much
use, all we want to know is whether it compiles.
---
 cmake/FindKernelHeaders.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cmake/FindKernelHeaders.cmake b/cmake/FindKernelHeaders.cmake
index 7c1f8ed..c04243e 100644
--- a/cmake/FindKernelHeaders.cmake
+++ b/cmake/FindKernelHeaders.cmake
@@ -16,7 +16,9 @@ if(NOT KERNEL_INSTALL_DIR)
 endif(NOT KERNEL_INSTALL_DIR)
 
 if(NOT EXISTS "${KERNEL_BUILD_DIR}/Module.symvers")
-    message(FATAL_ERROR "Module.symvers not found in ${KERNEL_BUILD_DIR}")
+    message(WARNING "\n\nModule.symvers not found in ${KERNEL_BUILD_DIR}\n"
+    "Your kernel sources don't seem to belong to a built kernel,"
+    " expect missing symbols when building kernel module.\n\n")
 endif()
 
 # find the Linux kernel headers from given KERNEL_BUILD_DIR
-- 
cgit v1.2.3-55-g7522