fix cmake error

core/general-server/op/CMakeLists.txt

@@ -5,15 +5,17 @@ if(WITH_OPENCV)
     LIST(APPEND op_srcs ${ppshitu_tools_srcs})
     LIST(APPEND op_srcs ${ocrtools_srcs})
 else()
-    set (EXCLUDE_DIR "general_detection_op.cpp")
-    set (EXCLUDE_DIR "general_picodet_op.cpp")
-    set (EXCLUDE_DIR "general_feature_extract_op.cpp")
+    LIST(APPEND EXCLUDE_LIST "general_detection_op.cpp")
+    LIST(APPEND EXCLUDE_LIST "general_picodet_op.cpp")
+    LIST(APPEND EXCLUDE_LIST "general_feature_extract_op.cpp")
     foreach (TMP_PATH ${op_srcs})
-        string (FIND ${TMP_PATH} ${EXCLUDE_DIR} EXCLUDE_DIR_FOUND)
-        if (NOT ${EXCLUDE_DIR_FOUND} EQUAL -1)
-            list (REMOVE_ITEM op_srcs ${TMP_PATH})
-            break()
-        endif ()
+        foreach (EXCLUDE_DIR ${EXCLUDE_LIST})
+            string (FIND ${TMP_PATH} ${EXCLUDE_DIR} EXCLUDE_DIR_FOUND)
+            if (NOT ${EXCLUDE_DIR_FOUND} EQUAL -1)
+                list (REMOVE_ITEM op_srcs ${TMP_PATH})
+                break()
+            endif ()
+        endforeach(EXCLUDE_DIR)
     endforeach(TMP_PATH)
 endif()
 LIST(APPEND serving_srcs ${op_srcs})