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_CVDisplayLink関連のエラーが出た時の対処方法

Last updated at Posted at 2014-09-29

新しいMac(10.9,Xcode6)に移行してofxOpenNIを使ってたら以下のエラーが出たので、その対処方法。

##Apple Mach-O Linker (Id) Error

Undefined symbols for architecture i386:
"_CVDisplayLinkGetNominalOutputVideoRefreshPeriod", referenced from:
_vidmodeFromCGDisplayMode in libglfw3.a(cocoa_monitor.m.o)
"_CVDisplayLinkCreateWithCGDisplay", referenced from:
__glfwSetVideoMode in libglfw3.a(cocoa_monitor.m.o)
__glfwPlatformGetVideoMode in libglfw3.a(cocoa_monitor.m.o)
__glfwPlatformGetVideoModes in libglfw3.a(cocoa_monitor.m.o)
"_CVDisplayLinkRelease", referenced from:
__glfwSetVideoMode in libglfw3.a(cocoa_monitor.m.o)
__glfwPlatformGetVideoMode in libglfw3.a(cocoa_monitor.m.o)
__glfwPlatformGetVideoModes in libglfw3.a(cocoa_monitor.m.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

##CoreVideo.frameworkを追加する

  1. プロジェクトナビゲータでプロジェクトを選択
  2. 左のプルダウンからTargets以下を選択
  3. Generalタブを選択
  4. Linked Frameworks and Librariesの下にある”+”を選択して、CoreVideo.frameworkを追加する

参照元によると、古いoFだとoF自身のプロジェクトがCoreVideo.frameworkを持ってるのに対し、新しいoF(0.8.4とか?)だと個々のプロジェクト側でCoreVideo.frameworkを持つように変更されているため、とのこと。
多分OSのバージョンとか、Xcode6は関係ない模様。
参照元:Fix for _CVDisplayLinkRelease etc errors

以上、Mach-O Linker Errorの倒し方の一つ。

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