How can I fix an error in CM7 Building?

[AC Question]

error in CM7 Building

hi guys , i'm trying to build CM7 for the LG Optimus L7 , but it dosen't work , it says :

device/lge/msm7x27a-common/wpa_supplicant_8_lib/Android.mk:27: external/wpa_supplicant_8/wpa_supplicant/android.config: No such file or directory
build/core/base_rules.mk:73: unusual tags shell_mksh on mkshrc at external/mksh
build/core/base_rules.mk:73: unusual tags shell_mksh on mksh at external/mksh

build/core/java_library.mk:18: *** frameworks/ex/chips: Target java libraries may not set LOCAL_RESOURCE_DIR. Stop.

do you have an idea , thanks