ffmpeg armv7,armv7s (for iOS)（验证通过，Mac10.8.2+xCode4.5.1可以编译）

本人初步追踪到的原始出处，可能是：

http://stackoverflow.com/questions/13233880/building-ffmpeg-library-for-ios6-0-armv7-processor-success-but-compile-error

本人转载自 http://blog.csdn.net/zengconggen/article/details/8179355

在此感谢原创作者和转载者。

严重注意，实际操作和文中所说有点出入，请看下面的特别说明部分。

本人所用Mac OS X 版本是 10.8.3, 编译时所用的xCode版本是4.5.1,ffmpeg版本是1.2.1

=========Howard 2013-06-17 特别说明==BEGIN===================

1. 下载ffmpeg：

git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg

2. 下载gas-preprocessor

地址： https://github.com/yuvi/gas-preprocessor,

下载完后把gas-preprocessor.pl 复制到 /usr/bin/ 目录下，修改权限  chmod 777

就是在控制台输入： chmod 777  /usr/bin/gas-preprocessor.pl

3. 本人所用Mac没有下面所说的/usr/local/这个路径，编译出来的.a 文件是在 ffmpeg对应的子目录当中，在ffmpeg目录查找一下.a文件，可以找到。

===========Howard 2013-06-17 特别说明==END===================

Here is my working Configure for cross-compiling FFmpeg on iOS 6 the arch is ARMv7

NOTE: You must have to have gas-preprocessor.pl inside /usr/local/bin/ please do not continue until you have gas-preprocessor.pl on your bin directory

• Download FFmpeg 1.0 "Angel" from here

• Unzip it and place it somewhere i.e. your Desktop folder

• Open terminal and browse to unzipped FFmpeg folder

• Copy and paste the following command, (be patient will take a while)

./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk --cpu=cortex-a8 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk' --enable-pic --enable-decoder=rawvideo --disable-asm

• Now type the following command on terminal make (wait a little more)

• Once it has finished now type on terminal sudo make install (wait again)

• Go to /usr/local/lib to find your freshly baked armv7 libs

• Enjoy!

  
  

  Added Support for armv7s

  This armv7s configure is totally untested and i dont really know if this would work, i don't own an iPhone 5 so we need someone to test the final armv7s libs

  ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk --cpu=cortex-a8 --extra-cflags='-arch armv7s' --extra-ldflags='-arch armv7s -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk' --enable-pic --enable-decoder=rawvideo --disable-asm

====模拟器版本=====================================================

//Howard 2013-06-17 以下是本人参考网上资料，针对Mac OS X 10.8.2, xCode 4.5.1 写的：

./configure   --disable-ffmpeg  --disable-ffplay  --disable-ffprobe --disable-ffserver --enable-avresample --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk" --target-os=darwin  --cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc" --extra-cflags="-arch i386" --extra-ldflags="-arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk" --arch=i386 --cpu=i386 --enable-pic --disable-asm 

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