xcode 使用 GLFW3 编译，链接器错误“未定义引用”
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Compiling with GLFW3, linker errors 'undefined reference'
提问by Appleshell
Having a minimal example using GLFW3:
有一个最小的例子使用GLFW3：
#include <GLFW/glfw3.h>
int main(int argc, const char * argv[]) {
glfwInit();
}
...results in a ton of linker errors: (small excerpt)
...导致大量链接器错误：（小节选）
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.frameworkand libglfw3.aare both linked.
OpenGL.framework并且libglfw3.a两者都有联系。
What is the reason for this? Compiling a glfw2application before worked like a charm.
这是什么原因？glfw2之前编译应用程序就像一个魅力。
回答by Valeriy Kliuk
回答by Andon M. Coleman
In Mac OS X, glfw3 uses Cocoa (NSGL) for its OpenGL context management. glfw2 used Carbon (CGL/AGL, depending on fullscreen or windowed mode).
在 Mac OS X 中，glfw3 使用 Cocoa (NSGL) 进行 OpenGL 上下文管理。glfw2 使用 Carbon（CGL/AGL，取决于全屏或窗口模式）。
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.
NSGL 更健壮，但它建立在 Objective C 框架 (Cocoa) 之上。为了让您的软件与 glfw3 一起正常工作，您应该包含 Cocoa 框架。
