From 1e9597534a109e3dbce730287c5b45e1b6782c93 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Tue, 19 Oct 2021 14:51:09 +0200
Subject: [BUILD] CheckPatch: Quote variable to avoid error if empty

The variable is most likely empty if the according kernel headers
directory was deleted. However, as it currently stands, cmake is
complaining about too few arguments, which isn't really helpful to the
user.
Instead, quote the variable to make cmake finish, and have the actual
compile process of the kernel module fail, which will yield a much more
helpful error message.
---
 cmake/FindCheckPatch.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'cmake')

diff --git a/cmake/FindCheckPatch.cmake b/cmake/FindCheckPatch.cmake
index 2772676..3fa1ec8 100644
--- a/cmake/FindCheckPatch.cmake
+++ b/cmake/FindCheckPatch.cmake
@@ -20,7 +20,7 @@ if(CheckPatch_EXECUTABLE)
     execute_process(COMMAND ${CheckPatch_EXECUTABLE} --version
                     OUTPUT_VARIABLE CheckPatch_VERBOSE_VERSION
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
-    string(REGEX REPLACE ".*Version:.([0-9]+\\.[0-9]+).*" "\\1" CheckPatch_VERSION ${CheckPatch_VERBOSE_VERSION})
+    string(REGEX REPLACE ".*Version:.([0-9]+\\.[0-9]+).*" "\\1" CheckPatch_VERSION "${CheckPatch_VERBOSE_VERSION}")
 endif(CheckPatch_EXECUTABLE)
 
 include(FindPackageHandleStandardArgs)
-- 
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