x264 编译

CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc

SYSROOT=./configure --host=arm-apple-darwin --cross-prefix='/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/' --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/ --prefix='dist' --extra-cflags='-arch armv7' --extra-ldflags=-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/usr/lib/system/ --extra-ldflags='-arch armv7' --enable-pic

make

make install

1、make没用，则xcode 需要安装command line tools

2、 No working C compiler found.检查目录 是否正确。