小弟最近做ucGUI在Nios2上的移植，ucGUI源码就2个文件夹Config和gui，我放在了我的工程目录下hello_world_0下，然后在下图所示的地方把.h头文件都包含进去了，但是编译仍然报下面的错，提示找不到.h头文件，但是下面这个GUI_Protected.h文件就在gui\Core里面，我已经把路径包含进去了啊！请问是什么问题，谢谢！

Kind Status Priority Description Resource In Folder Location

Error *** [obj/gui/AntiAlias/GUIAAArc.o] Error 1 hello_world_0

Error GUI_Protected.h: No such file or directory GUIAAArc.c hello_world_0/gui/AntiAlias line 32

Warning implicit declaration of function `GUI_GetPenSize' GUIAAArc.c hello_world_0/gui/AntiAlias line 41

Error error: `GUI_Context' undeclared (first use in this function) GUIAAArc.c hello_world_0/gui/AntiAlias line 45
Error error: (Each undeclared identifier is reported only once GUIAAArc.c hello_world_0/gui/AntiAlias line 45
Warning implicit declaration of function `GUI_AA_Init_HiRes' GUIAAArc.c hello_world_0/gui/AntiAlias line 52
Warning implicit declaration of function `GUI_SetPenSize' GUIAAArc.c hello_world_0/gui/AntiAlias line 53
Warning implicit declaration of function `GL_DrawArc' GUIAAArc.c hello_world_0/gui/AntiAlias line 54
Warning implicit declaration of function `GUI_AA_Exit' GUIAAArc.c hello_world_0/gui/AntiAlias line 57