Index: doxygen-1.8.16/cmake/git_watcher.cmake
===================================================================
--- doxygen-1.8.16.orig/cmake/git_watcher.cmake	2019-07-30 15:10:10.000000000 +0200
+++ doxygen-1.8.16/cmake/git_watcher.cmake	2019-09-30 10:10:55.145977348 +0200
@@ -69,7 +69,7 @@ CHECK_OPTIONAL_VARIABLE(GIT_WORKING_DIR
 # Check the optional git variable.
 # If it's not set, we'll try to find it using the CMake packaging system.
 if(NOT DEFINED GIT_EXECUTABLE)
-    find_package(Git QUIET REQUIRED)
+    find_package(Git QUIET)
 endif()
 CHECK_REQUIRED_VARIABLE(GIT_EXECUTABLE)