试图编译与armv6和arv7架构的iPhoneOS平台的FFMPEG库

Question

我试图编译FFMPEG库的IOS平台与ARM7架构。我从http://www.ffmpeg.org下载了FFMPEG库。

我成功地为iPhoneSimulator的i386架构构建了静态库。但我需要iPhoneOS的库。使用配置命令我得到一个错误。以下是我的命令细节。

i386的（这是无差错）：

./configure --enable-cross-compile --disable-debug --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-doc --disable-network --disable-everything --enable-protocol=file --enable-demuxer=mov --enable-muxer=mpegts --enable-bsf=h264_mp4toannexb --arch=i386 --target-os=darwin --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc --as='./gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneOS6.1.sdk --cpu=i386 --extra-cflags='-arch i386' --extra-ldflags='-arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk' --prefix="/Users/amit/Desktop/LivuLib-master/LivuLIb/ffmpeg/bin/newLib" 

对ARMv7：

./configure --enable-cross-compile --disable-debug --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-doc --disable-network --disable-everything --enable-protocol=file --enable-demuxer=mov --enable-muxer=mpegts --enable-bsf=h264_mp4toannexb --arch=armv7 --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=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk --cpu=cortex-a9 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk' --prefix="/Users/amit/Desktop/LivuLib-master/LivuLIb/ffmpeg/bin/newLib" 

对于上述命令ARM7我得到这个错误：

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc is unable to create an executable file. 
C compiler test failed. 

If you think configure made a mistake, make sure you are using the latest 
version from SVN. 

所以请给我一个可能的解决方案。为什么它不起作用？或者我需要更新任何东西。谢谢。

Answer 1

我意识到这个问题被问到约2.5个月前，所以提问者可能已经移动，但我在搜索同一问题的答案时遇到了它。所以，希望这会对那里的人有所帮助！

我真的不得不做的是验证所有我使用的路径实际上指向的东西存在。

具体来说，我试图运行：

./configure \ 
--prefix=armv7 \ 
--disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver \ 
--enable-avresample --enable-cross-compile \ 
--sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk" \ 
--target-os=darwin \ 
--cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" \ 
--extra-cflags="-arch armv7 -mfpu=neon -miphoneos-version-min=6.0" \ 
--extra-ldflags="-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk -miphoneos-version-min=6.0" \ 
--arch=arm --cpu=cortex-a9 --enable-pic 

^从http://www.tangentsoftworks.com/2012/11/12/how-to-prepare-your-mac-for-ios-development-with-ffmpeg-libraries/

当我无法得到它的工作，我决定不再懒惰和实际检查中列出的目录路径：任何以“/ Applications/...”开头的东西。 我发现我没有安装“iPhoneOS6.0.sdk”（它在路径中被引用）。

更改脚本来此工作：

./configure \ 
--prefix=armv7 \ 
--disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver \ 
--enable-avresample --enable-cross-compile \ 
--sysroot="/applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk" \ 
--target-os=darwin --cc="/applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" \ 
--extra-cflags="-arch armv7 -mfpu=neon -miphoneos-version-min=6.0" \ 
--extra-ldflags="-arch armv7 -isysroot /applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk -miphoneos-version-min=6.0" \ 
--arch=arm --cpu=cortex-a9 --enable-pic 

总之，只要仔细检查你的路。希望有所帮助！