adding dependencies in CMake

CMakeLists.txt

@@ -216,8 +216,8 @@ add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/open62541.c
                DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/tools/amalgamate.py ${PROJECT_BINARY_DIR}/src_generated/ua_config.h ${PROJECT_SOURCE_DIR}/src/server/ua_nodestore_hash.inc ${lib_sources})
 
 if(ENABLE_AMALGAMATION)
-    add_custom_target(amalgamation ALL DEPENDS ${PROJECT_BINARY_DIR}/open62541.h)
-    add_library(open62541-object OBJECT ${PROJECT_BINARY_DIR}/open62541.c)
+    add_custom_target(amalgamation ALL DEPENDS ${PROJECT_BINARY_DIR}/open62541.h ${PROJECT_BINARY_DIR}/open62541.c)
+    add_library(open62541-object OBJECT ${PROJECT_BINARY_DIR}/open62541.c ${PROJECT_BINARY_DIR}/open62541.h)
     include_directories(${PROJECT_BINARY_DIR})
 else()
     add_definitions(-DNOT_AMALGATED)