我已经像这样设置了 LDFLAGS ：
export LDFLAGS="-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/lib"
但它似乎仍然只在 /usr/lib/system
configure:2859: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/lib conftest.c >&5
ld: in /usr/lib/system/libcache.dylib, missing required architecture armv7 in file /usr/lib/system/libcache.dylib (2 slices) for architecture armv7
collect2: ld returned 1 exit status
我该如何设置正确的方法？？？