updated build system

CMakeLists.txt

@@ -22,6 +22,9 @@ include(cmake/functions.cmake)
 include(cmake/libraries.cmake)
 
 if(PROJECT_BUILD)
+  unset(PROJECT_GIT_REV CACHE)
+  unset(PROJECT_VERSION CACHE)
+
   execute_process(
     COMMAND git rev-parse --short HEAD
     WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
@@ -42,9 +45,6 @@ if(PROJECT_BUILD)
     ${ADDITIONAL_SOURCES}
   )
 
-  unset(PROJECT_GIT_REV CACHE)
-  unset(PROJECT_VERSION CACHE)
-
   include(project.cmake)
 
   configure_file(