使用GLFW3编译，链接器错误'未定义引用' [英] Compiling with GLFW3, linker errors 'undefined reference'

问题描述

有一个使用 GLFW3 的最小示例：

Having a minimal example using GLFW3:

#include <GLFW/glfw3.h>

int main(int argc, const char * argv[]) {
    glfwInit();
}

...导致大量链接器错误：（small excerpt） / p>

...results in a ton of linker errors: (small excerpt)

Undefined symbols for architecture x86_64:
  "_CFArrayAppendValue", referenced from:
      _addJoystickElement in libglfw3.a(cocoa_joystick.m.o)
  "_CFArrayApplyFunction", referenced from:
      __glfwInitJoysticks in libglfw3.a(cocoa_joystick.m.o)
      _addJoystickElement in libglfw3.a(cocoa_joystick.m.o)
  "_CFArrayCreateMutable", referenced from:
      __glfwInitJoysticks in libglfw3.a(cocoa_joystick.m.o)

  ...

  "_objc_msgSend_fixup", referenced from:
  l_objc_msgSend_fixup_count in libglfw3.a(cocoa_monitor.m.o)
  l_objc_msgSend_fixup_objectAtIndex_ in libglfw3.a(cocoa_monitor.m.o)
  l_objc_msgSend_fixup_objectForKey_ in libglfw3.a(cocoa_monitor.m.o)
  l_objc_msgSend_fixup_alloc in libglfw3.a(cocoa_init.m.o)
  l_objc_msgSend_fixup_release in libglfw3.a(cocoa_init.m.o)
  l_objc_msgSend_fixup_alloc in libglfw3.a(nsgl_context.m.o)
  l_objc_msgSend_fixup_release in libglfw3.a(nsgl_context.m.o)
  ...

OpenGL.framework 和 libglfw3.a 都已链接。

这是什么原因？编译工作就像一个魅力前的 glfw2 应用程序。

What is the reason for this? Compiling a glfw2 application before worked like a charm.

推荐答案

在Mac OS X，glfw3使用Cocoa（NSGL）进行OpenGL上下文管理。 glfw2使用碳（CGL / AGL，取决于全屏或窗口模式）。

In Mac OS X, glfw3 uses Cocoa (NSGL) for its OpenGL context management. glfw2 used Carbon (CGL/AGL, depending on fullscreen or windowed mode).

NSGL更强劲，但它是建立在一个Objective C的框架（可可）建成。为了使您的软件与glfw3正常工作，您应该包括Cocoa框架。

NSGL is more robust, but it is built upon an Objective C framework (Cocoa). In order for your software to work correctly with glfw3, you should include the Cocoa framework.

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