移植UCGUI的时候出现这个error?

躺在天使的翅膀上

Build target 'Target 1'
compiling LCDDummy.c...
linking...
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_DrawHLine (referred from gui2dlib.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_DrawPixel (referred from gui2dlib.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_Color2Index (referred from gui_bmp.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_DrawBitmap (referred from gui_bmp.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_Index2Color (referred from gui_color2viscolor.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_SetColorIndex (referred from gui_drawbitmapex.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_FillRect (referred from gui_fillrect.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_SetBkColor (referred from gui_setcolor.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_SetColor (referred from gui_setcolor.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_SetBkColorIndex (referred from gui_setcolorindex.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_SetDrawMode (referred from gui_setdrawmode.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_Init (referred from guicore.o).
..\OBJ\LCD.axf: Error: L6218E: Undefined symbol LCD_SetClipRectMax (referred from lcd_selectlcd.o).
Target not created
请问这会是什么原因额？

正点原子

这些函数没有实现。。
你要自己去实现这些函数。