ffmpeg - 链接 libavcodec os x ffmpeg ApplicationServices.framework

Question

这是我的错误:(较新版本的ffmpeg)

dyld: Library not loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices
  Referenced from: /Users/me/path/to/lib/libavcodec.dylib
  Reason: Incompatible library version: libavcodec.dylib requires version 64.0.0 or later, but ApplicationServices provides version 1.0.0

我已经阅读了关于 SO 的问题，这些问题说您需要链接 ApplicationServices.framework ......我已经完成了，它没有区别......

我已经搜索了该框架的其他版本:

$ mdfind ApplicationServices.framework
/System/Library/Frameworks/ApplicationServices.framework

只有一个...

然后检查框架...

$ otool -L /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices 
/System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices:
    /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices (compatibility version 1.0.0, current version 48.0.0)
    /System/Library/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics (compatibility version 64.0.0, current version 600.0.0)
...

和 libavcodec

otool -L ../lib/libavcodec.dylib 
../lib/libavcodec.dylib:
    libavcodec.dylib (compatibility version 56.0.0, current version 56.60.100)
    @loader_path/libswresample.dylib (compatibility version 1.0.0, current version  ...
...
/System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices (compatibility version 64.0.0, current version 600.0.0)

我正在用 -mmacosx-version-min=10.7 编译所有内容

所以可能是工具链中的错误？

编译器:

clang -v
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.2.0
Thread model: posix

链接器:

ld -v
@(#)PROGRAM:ld  PROJECT:ld64-253.9
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em (tvOS)
LTO support using: Apple LLVM 7.0.2 (clang-700.1.81)

Answer 1

这似乎是 clang 中的一个错误，我重新安装了 Xcode 6.x，现在 libavcodec 的 otool 输出是:

/System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices (compatibility version 1.0.0, current version 600.0.0)

它仍然与库本身的输出不匹配......但它的兼容性版本足够低......我会看看我是否可以隔离并提交一个错误......