diff --git a/llvm/cmake/modules/VersionFromVCS.cmake b/llvm/cmake/modules/VersionFromVCS.cmake
--- a/llvm/cmake/modules/VersionFromVCS.cmake
+++ b/llvm/cmake/modules/VersionFromVCS.cmake
@@ -4,7 +4,7 @@
 # extra argument, otherwise uses CMAKE_CURRENT_SOURCE_DIR).
 
 function(get_source_info path revision repository)
-  find_package(Git)
+  find_package(Git QUIET)
   if(GIT_FOUND)
     execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --git-dir
       WORKING_DIRECTORY ${path}
@@ -45,5 +45,7 @@
         set(${repository} ${path} PARENT_SCOPE)
       endif()
     endif()
+  else()
+    message(WARNING "Git not found. Version cannot be determined.")
   endif()
 endfunction()