我在本地编译了库SDL，并且试图将其链接到项目中。我在OSX上。
但是，如果我仅使用库中的类型变量（声明），则在调用库函数时会被g++困在编译过程中，而库函数会正确编译。
我正在编译以下源代码：
#include <iostream>
#include "SDL_keyboard.h"
#include "SDL_keycode.h"
#include "SDL_scancode.h"
#include "SDL.h"
using namespace std;
int main(int argc, char* argv []) {
SDL_Event event;
bool quit=false;
while(!quit)
{
while(SDL_PollEvent(&event))
{
if(event.type==SDL_KEYDOWN)
{
cout<<"Key dow\n";
}
else if(event.type==SDL_QUIT)
{
quit=true;
}
}
}
return 0;
}
使用以下g++命令：
g++ -I../../SDL2-2.0.8/build/include/SDL2/ -L../../SDL2-2.0.8/build/ -lSDL2 -lSDL2d `pkg-config --cflags --libs ../../SDL2-2.0.8/build/lib/pkgconfig/sdl2.pc` -lSDL2 testSDl.cpp -o test
并获得未定义的引用链接错误：
Undefined symbols for architecture x86_64:
"_AudioObjectAddPropertyListener", referenced from:
_COREAUDIO_Init in libSDL2.a(SDL_coreaudio.m.o)
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
"_AudioObjectGetPropertyData", referenced from:
_COREAUDIO_OpenDevice in libSDL2.a(SDL_coreaudio.m.o)
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
_device_unplugged in libSDL2.a(SDL_coreaudio.m.o)
_build_device_list in libSDL2.a(SDL_coreaudio.m.o)
"_AudioObjectGetPropertyDataSize", referenced from:
_build_device_list in libSDL2.a(SDL_coreaudio.m.o)
"_AudioObjectRemovePropertyListener", referenced from:
_COREAUDIO_CloseDevice in libSDL2.a(SDL_coreaudio.m.o)
_COREAUDIO_Deinitialize in
libSDL2.a(SDL_coreaudio.m.o)
"_AudioQueueAllocateBuffer", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
"_AudioQueueDispose", referenced from:
_COREAUDIO_CloseDevice in libSDL2.a(SDL_coreaudio.m.o)
"_AudioQueueEnqueueBuffer", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
_inputCallback in libSDL2.a(SDL_coreaudio.m.o)
_outputCallback in libSDL2.a(SDL_coreaudio.m.o)
"_AudioQueueNewInput", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
"_AudioQueueNewOutput", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
"_AudioQueueSetProperty", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
"_AudioQueueStart", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
"_CFArrayApplyFunction", referenced from:
_JoystickDeviceWasAddedCallback in libSDL2.a(SDL_sysjoystick.c.o)
_AddHIDElement in libSDL2.a(SDL_sysjoystick.c.o)
"_CFArrayCreate", referenced from:
_SDL_SYS_JoystickInit in libSDL2.a(SDL_sysjoystick.c.o)
_Cocoa_InitKeyboard in libSDL2.a(SDL_cocoakeyboard.m.o)
"_CFArrayGetCount", referenced from:
_SDL_GetPowerInfo_MacOSX in libSDL2.a(SDL_syspower.c.o)
_JoystickDeviceWasAddedCallback in libSDL2.a(SDL_sysjoystick.c.o)
_AddHIDElement in libSDL2.a(SDL_sysjoystick.c.o)
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CFArrayGetValueAtIndex", referenced from:
_SDL_GetPowerInfo_MacOSX in libSDL2.a(SDL_syspower.c.o)
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CFDataGetBytePtr", referenced from:
_UpdateKeymap in libSDL2.a(SDL_cocoakeyboard.m.o)
"_CFDictionaryCreate", referenced from:
_CreateHIDDeviceMatchDictionary in libSDL2.a(SDL_sysjoystick.c.o)
"_CFDictionaryCreateMutable", referenced from:
_CreateHIDDeviceMatchingDictionary in libSDL2.a(SDL_cocoakeyboard.m.o)
"_CFDictionaryGetValue", referenced from:
_MacHaptic_MaybeAddDevice in libSDL2.a(SDL_syshaptic.c.o)
"_CFDictionaryGetValueIfPresent", referenced from:
_SDL_GetPowerInfo_MacOSX in libSDL2.a(SDL_syspower.c.o)
"_CFDictionarySetValue", referenced from:
_CreateHIDDeviceMatchingDictionary in libSDL2.a(SDL_cocoakeyboard.m.o)
"_CFGetTypeID", referenced from:
_AddHIDElement in libSDL2.a(SDL_sysjoystick.c.o)
"_CFNumberCreate", referenced from:
_CreateHIDDeviceMatchDictionary in libSDL2.a(SDL_sysjoystick.c.o)
_CreateHIDDeviceMatchingDictionary in libSDL2.a(SDL_cocoakeyboard.m.o)
"_CFNumberGetValue", referenced from:
_SDL_GetPowerInfo_MacOSX in libSDL2.a(SDL_syspower.c.o)
_JoystickDeviceWasAddedCallback in libSDL2.a(SDL_sysjoystick.c.o)
_MacHaptic_MaybeAddDevice in libSDL2.a(SDL_syshaptic.c.o)
"_CFRelease", referenced from:
_build_device_list in libSDL2.a(SDL_coreaudio.m.o)
_SDL_GetPowerInfo_MacOSX in libSDL2.a(SDL_syspower.c.o)
_SDL_SYS_JoystickInit in libSDL2.a(SDL_sysjoystick.c.o)
_SDL_SYS_JoystickQuit in libSDL2.a(SDL_sysjoystick.c.o)
_CreateHIDDeviceMatchDictionary in libSDL2.a(SDL_sysjoystick.c.o)
_JoystickDeviceWasAddedCallback in libSDL2.a(SDL_sysjoystick.c.o)
_MacHaptic_MaybeAddDevice in libSDL2.a(SDL_syshaptic.c.o)
...
"_CFRunLoopGetCurrent", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
_SDL_SYS_JoystickInit in libSDL2.a(SDL_sysjoystick.c.o)
_FreeDevice in libSDL2.a(SDL_sysjoystick.c.o)
_SDL_SYS_JoystickQuit in libSDL2.a(SDL_sysjoystick.c.o)
_JoystickDeviceWasAddedCallback in libSDL2.a(SDL_sysjoystick.c.o)
"_CFRunLoopGetMain", referenced from:
_Cocoa_InitKeyboard in libSDL2.a(SDL_cocoakeyboard.m.o)
"_CFRunLoopRunInMode", referenced from:
_audioqueue_thread in libSDL2.a(SDL_coreaudio.m.o)
_SDL_SYS_JoystickInit in libSDL2.a(SDL_sysjoystick.c.o)
_SDL_SYS_JoystickDetect in libSDL2.a(SDL_sysjoystick.c.o)
"_CFStringCompare", referenced from:
_SDL_GetPowerInfo_MacOSX in libSDL2.a(SDL_syspower.c.o)
_GetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CFStringGetCString", referenced from:
_build_device_list in libSDL2.a(SDL_coreaudio.m.o)
_JoystickDeviceWasAddedCallback in libSDL2.a(SDL_sysjoystick.c.o)
_MacHaptic_MaybeAddDevice in libSDL2.a(SDL_syshaptic.c.o)
"_CFStringGetLength", referenced from:
_build_device_list in libSDL2.a(SDL_coreaudio.m.o)
"_CFStringGetMaximumSizeForEncoding", referenced from:
_build_device_list in libSDL2.a(SDL_coreaudio.m.o)
"_CFStringGetSystemEncoding", referenced from:
_MacHaptic_MaybeAddDevice in libSDL2.a(SDL_syshaptic.c.o)
"_CFUUIDGetConstantUUIDWithBytes", referenced from:
_SDL_SYS_HapticEffectType in libSDL2.a(SDL_syshaptic.c.o)
"_CGAcquireDisplayFadeReservation", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGAssociateMouseAndMouseCursorPosition", referenced from:
-[Cocoa_WindowListener mouseMoved:] in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_WarpMouseGlobal in libSDL2.a(SDL_cocoamouse.m.o)
_Cocoa_SetRelativeMouseMode in libSDL2.a(SDL_cocoamouse.m.o)
"_CGCaptureAllDisplays", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayBounds", referenced from:
_Cocoa_GetDisplayBounds in libSDL2.a(SDL_cocoamodes.m.o)
_Cocoa_GetDisplayUsableBounds in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayCapture", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayCopyAllDisplayModes", referenced from:
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayCopyDisplayMode", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayFade", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayIDToOpenGLDisplayMask", referenced from:
_Cocoa_GL_CreateContext in libSDL2.a(SDL_cocoaopengl.m.o)
"_CGDisplayIOServicePort", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayIsMain", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayMirrorsDisplay", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayModeCopyPixelEncoding", referenced from:
_GetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayModeGetHeight", referenced from:
_GetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayModeGetRefreshRate", referenced from:
_GetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayModeGetWidth", referenced from:
_GetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayModeRelease", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
_Cocoa_QuitModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayModeRetain", referenced from:
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayMoveCursorToPoint", referenced from:
-[Cocoa_WindowListener mouseMoved:] in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_SetWindowGrab in libSDL2.a(SDL_cocoawindow.m.o)
"_CGDisplayPixelsHigh", referenced from:
-[Cocoa_WindowListener windowDidMove:] in libSDL2.a(SDL_cocoawindow.m.o)
-[Cocoa_WindowListener windowDidResize:] in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_CreateWindow in libSDL2.a(SDL_cocoawindow.m.o)
_SetupWindowData in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_SetWindowPosition in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_SetWindowSize in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_SetWindowFullscreen in libSDL2.a(SDL_cocoawindow.m.o)
...
"_CGDisplayPixelsWide", referenced from:
_Cocoa_GetDisplayDPI in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayRelease", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplayScreenSize", referenced from:
_Cocoa_GetDisplayDPI in libSDL2.a(SDL_cocoamodes.m.o)
"_CGDisplaySetDisplayMode", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGGetDisplayTransferByTable", referenced from:
_Cocoa_GetWindowGammaRamp in libSDL2.a(SDL_cocoawindow.m.o)
"_CGGetOnlineDisplayList", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CGMainDisplayID", referenced from:
-[Cocoa_WindowListener windowDidMove:] in libSDL2.a(SDL_cocoawindow.m.o)
-[Cocoa_WindowListener windowDidResize:] in libSDL2.a(SDL_cocoawindow.m.o)
-[Cocoa_WindowListener mouseMoved:] in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_CreateWindow in libSDL2.a(SDL_cocoawindow.m.o)
_SetupWindowData in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_SetWindowPosition in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_SetWindowSize in libSDL2.a(SDL_cocoawindow.m.o)
...
"_CGReleaseAllDisplays", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGReleaseDisplayFadeReservation", referenced from:
_Cocoa_SetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CGSetDisplayTransferByTable", referenced from:
_Cocoa_SetWindowGammaRamp in libSDL2.a(SDL_cocoawindow.m.o)
"_CGShieldingWindowLevel", referenced from:
_Cocoa_SetWindowFullscreen in libSDL2.a(SDL_cocoawindow.m.o)
_Cocoa_SetWindowGrab in libSDL2.a(SDL_cocoawindow.m.o)
"_CGWarpMouseCursorPosition", referenced from:
_Cocoa_WarpMouseGlobal in libSDL2.a(SDL_cocoamouse.m.o)
"_CVDisplayLinkCreateWithCGDisplay", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
"_CVDisplayLinkGetNominalOutputVideoRefreshPeriod", referenced from:
_GetDisplayMode in libSDL2.a(SDL_cocoamodes.m.o)
"_CVDisplayLinkRelease", referenced from:
_Cocoa_InitModes in libSDL2.a(SDL_cocoamodes.m.o)
_Cocoa_GetDisplayModes in libSDL2.a(SDL_cocoamodes.m.o)
"_FFCreateDevice", referenced from:
_SDL_SYS_HapticOpenFromService in libSDL2.a(SDL_syshaptic.c.o)
"_FFDeviceCreateEffect", referenced from:
_SDL_SYS_HapticNewEffect in libSDL2.a(SDL_syshaptic.c.o)
"_FFDeviceGetForceFeedbackCapabilities", referenced from:
_SDL_SYS_HapticOpenFromService in libSDL2.a(SDL_syshaptic.c.o)
"_FFDeviceGetForceFeedbackProperty", referenced from:
_SDL_SYS_HapticOpenFromService in libSDL2.a(SDL_syshaptic.c.o)
"_FFDeviceReleaseEffect", referenced from:
_SDL_SYS_HapticDestroyEffect in libSDL2.a(SDL_syshaptic.c.o)
"_FFDeviceSendForceFeedbackCommand", referenced from:
_SDL_SYS_HapticOpenFromService in libSDL2.a(SDL_syshaptic.c.o)
_SDL_SYS_HapticPause in libSDL2.a(SDL_syshaptic.c.o)
_SDL_SYS_HapticUnpause in libSDL2.a(SDL_syshaptic.c.o)
_SDL_SYS_HapticStopAll in libSDL2.a(SDL_syshaptic.c.o)
"_FFDeviceSetForceFeedbackProperty", referenced from:
_SDL_SYS_HapticSetGain in libSDL2.a(SDL_syshaptic.c.o)
_SDL_SYS_HapticSetAutocenter in libSDL2.a(SDL_syshaptic.c.o)
"_FFEffectGetEffectStatus", referenced from:
_SDL_SYS_HapticGetEffectStatus in libSDL2.a(SDL_syshaptic.c.o)
"_FFEffectSetParameters", referenced from:
_SDL_SYS_HapticUpdateEffect in libSDL2.a(SDL_syshaptic.c.o)
"_FFEffectStart", referenced from:
_SDL_SYS_HapticRunEffect in libSDL2.a(SDL_syshaptic.c.o)
"_FFEffectStop", referenced from:
_SDL_SYS_HapticStopEffect in libSDL2.a(SDL_syshaptic.c.o)
"_FFIsForceFeedback", referenced from:
_JoystickDeviceWasAddedCallback in libSDL2.a(SDL_sysjoystick.c.o)
_MacHaptic_MaybeAddDevice in libSDL2.a(SDL_syshaptic.c.o)
"_FFReleaseDevice", referenced from:
_SDL_SYS_HapticOpenFromService in libSDL2.a(SDL_syshaptic.c.o)
_SDL_SYS_HapticClose in libSDL2.a(SDL_syshaptic.c.o)
"_IODisplayCreateInfoDictionary", referenced from:
_Cocoa_InitModes in
[错误仍然存在，但时间过长]
我尝试了this solution，但是它不起作用