CONFIG_ENABLE_P2P BUILD failed

[champaignxp]

hi.I holp to use wifi scan,so i add "#define CONFIG_ENABLE_P2P 1"on the file "platform_opts.h",but build is failed.
Linking
Error[Li005]: no definition for "cmd_wifi_p2p_auto_go_start" [referenced from D:\sdk-ameba-v4.0b_without_NDA_GCC_V1.0.0\project\realtek_amebaz_va0_example\EWARM-RELEASE\Debug\Obj\atcmd_wifi.o]
Error[Li005]: no definition for "cmd_p2p_find" [referenced from D:\sdk-ameba-v4.0b_without_NDA_GCC_V1.0.0\project\realtek_amebaz_va0_example\EWARM-RELEASE\Debug\Obj\atcmd_wifi.o]
Error[Li005]: no definition for "cmd_p2p_info" [referenced from D:\sdk-ameba-v4.0b_without_NDA_GCC_V1.0.0\project\realtek_amebaz_va0_example\EWARM-RELEASE\Debug\Obj\atcmd_wifi.o]
Error[Li005]: no definition for "cmd_p2p_disconnect" [referenced from D:\sdk-ameba-v4.0b_without_NDA_GCC_V1.0.0\project\realtek_amebaz_va0_example\EWARM-RELEASE\Debug\Obj\atcmd_wifi.o]...