fix "make dist" to support submodules

cmake/make_dist.cmake.in

@@ -28,7 +28,6 @@ SET(TAR_EXECUTABLE "@TAR_EXECUTABLE@")
 SET(CMAKE_GENERATOR "@CMAKE_GENERATOR@")
 SET(CMAKE_MAKE_PROGRAM "@CMAKE_MAKE_PROGRAM@")
 SET(CMAKE_SYSTEM_NAME "@CMAKE_SYSTEM_NAME@")
-SET(CONNECTOR_C_GIT_TAG "@CONNECTOR_C_GIT_TAG@")
 
 SET(VERSION "@VERSION@")
 
@@ -44,17 +43,10 @@ IF(GIT_EXECUTABLE)
   MESSAGE(STATUS "Running git checkout-index")
   EXECUTE_PROCESS(
     COMMAND "${GIT_EXECUTABLE}" checkout-index --all --prefix=${PACKAGE_DIR}/
+    COMMAND "${GIT_EXECUTABLE}" submodule foreach "${GIT_EXECUTABLE} checkout-index --all --prefix=${PACKAGE_DIR}/$path/"
     WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
     RESULT_VARIABLE RESULT
   )
-  IF(RESULT EQUAL 0)
-    MESSAGE(STATUS "Cloning Connector/C ")
-    EXECUTE_PROCESS(
-      COMMAND "${GIT_EXECUTABLE}" clone https://github.com/MariaDB/mariadb-connector-c -b ${CONNECTOR_C_GIT_TAG}
-      WORKING_DIRECTORY ${PACKAGE_DIR}
-      RESULT_VARIABLE RESULT
-    )
-  ENDIF()
   IF(NOT RESULT EQUAL 0)
     SET(GIT_EXECUTABLE)
   ENDIF()