这是我的编译指令：

./configure --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='
gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk --enable-cross-compile --target-os=darwin --cpu=arm1176jzf-s --arch=arm --extra-cflags='-arch armv6 --sysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk' --extra-ldflags='-arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk'

重点是extra flags里面的-sysroot和-isysroot...
虽然嵌入Xcode 项目还是有问题，但是编译都成功了。