From 049e70bea8fc4a7a654de721cb4bf6be0bcb885c Mon Sep 17 00:00:00 2001
From: Steffen Pankratz <kratz00@gmx.de>
Date: Sat, 20 Mar 2021 14:05:06 +0100
Subject: [PATCH] fix for CMake out of source builds not getting Git revision

Signed-off-by: Steffen Pankratz <kratz00@gmx.de>

Original warning:
fatal: not a git repository (or any of the parent directories): .git
---
 CMakeLists.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b076676e..868e6668 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,8 @@ execute_process(COMMAND echo -n ${VERSION}
 
 execute_process(COMMAND git describe --always
                 OUTPUT_VARIABLE REVISION
-                OUTPUT_STRIP_TRAILING_WHITESPACE)
+                OUTPUT_STRIP_TRAILING_WHITESPACE
+                WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
 if(NOT REVISION)
   execute_process(COMMAND date +p%Y%m%d
                   OUTPUT_VARIABLE REVISION