VS2013 ERROR LNK2019: unresolved external symbol

a784063999 2016-12-27 02:06:07

編譯時遇到錯誤, 文件都有加進Project, 不知道哪裏出問題, 部分代碼和完整錯誤提示如下.

context.h

#pragma once

#include <vector>

#include "loadVulkanAPI.h"



void createInstance();

void createDevice();

... // 省略

context.cpp

#include "context.h"

#include "config.h"

#include <FreeImage.h>



void createInstance()

{

	loadVulkanBaseAPI();

	... // 省略

	vkSuccessOrDie(vkCreateInstance(&instanceCreateInfo, NULL, &instance), "Failed to create instance");

	loadVulkanInstanceAPI(instance);

	... // 省略

}



void createDevice()

{

	... // 省略

	vkSuccessOrDie(vkCreateDevice(gpu, &deviceCreateInfo, NULL, &device), "Failed to create Vulkan Device");

	loadVulkanDeviceAPI(device);



	// Gather physical device memory properties

	vkGetPhysicalDeviceMemoryProperties(gpu, &deviceMemProps);

	vkGetDeviceQueue(device, 0, 0, &graphicsQueue);

}

... // 省略

loadVulkanAPI.h

#pragma once

#define VK_USE_PLATFORM_WIN32_KHR

#define VK_NO_PROTOTYPES

#include "vulkan/vulkan.h"

#include "NativeLibrary.h"

#include "debugOutput.h"



bool loadVulkanBaseAPI();

bool loadVulkanInstanceAPI(VkInstance instance); 

bool loadVulkanDeviceAPI(VkDevice device);

... // 省略

loadVulkanAPI.cpp

#include "loadVulkanAPI.h"



#define PVR_STR(x) #x

#define PVR_VULKAN_GET_INSTANCE_POINTER(instance, function_name) vk##function_name = (PFN_vk##function_name)vkGetInstanceProcAddr(instance, "vk" PVR_STR(function_name));

#define PVR_VULKAN_GET_DEVICE_POINTER(device, function_name) vk##function_name = (PFN_vk##function_name)vkGetDeviceProcAddr(device, "vk" PVR_STR(function_name));



static NativeLibrary vkLib("vulkan-1.dll");



bool initVulkan()

{

	vkGetInstanceProcAddr = (PFN_vkGetInstanceProcAddr)vkLib.getFunction("vkGetInstanceProcAddr");

	vkEnumerateInstanceExtensionProperties = (PFN_vkEnumerateInstanceExtensionProperties)vkLib.getFunction("vkEnumerateInstanceExtensionProperties");

	vkEnumerateInstanceLayerProperties = (PFN_vkEnumerateInstanceLayerProperties)vkLib.getFunction("vkEnumerateInstanceLayerProperties");

	vkCreateInstance = (PFN_vkCreateInstance)vkLib.getFunction("vkCreateInstance");

	vkDestroyInstance = (PFN_vkDestroyInstance)vkLib.getFunction("vkDestroyInstance");

	return true;

}



bool initVulkanInstance(VkInstance instance)

{

	PVR_VULKAN_GET_INSTANCE_POINTER(instance, EnumerateDeviceLayerProperties);

	...  // 省略

	return true;

}



bool initVulkanDevice(VkDevice device)

{

	PVR_VULKAN_GET_DEVICE_POINTER(device, CreateRenderPass);

	...  // 省略

	return true;

}

...// 省略

錯誤Output

1>context.obj : error LNK2019: unresolved external symbol "bool __cdecl loadVulkanBaseAPI(void)" (?loadVulkanBaseAPI@@YA_NXZ) referenced in function "void __cdecl createInstance(void)" (?createInstance@@YAXXZ)

1>context.obj : error LNK2019: unresolved external symbol "bool __cdecl loadVulkanInstanceAPI(struct VkInstance_T *)" (?loadVulkanInstanceAPI@@YA_NPAUVkInstance_T@@@Z) referenced in function "void __cdecl createInstance(void)" (?createInstance@@YAXXZ)

1>context.obj : error LNK2019: unresolved external symbol "bool __cdecl loadVulkanDeviceAPI(struct VkDevice_T *)" (?loadVulkanDeviceAPI@@YA_NPAUVkDevice_T@@@Z) referenced in function "void __cdecl createDevice(void)" (?createDevice@@YAXXZ)

...全文

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ipqtjmqj 2016-12-27

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引用 9 楼 a784063999 的回复:

[quote=引用 8 楼 ipqtjmqj 的回复:] [quote=引用 7 楼 a784063999 的回复:] [quote=引用 6 楼 ipqtjmqj 的回复:] 你在loadVulkanAPI.cpp中有定义下面三个函数吗 bool loadVulkanBaseAPI(); bool loadVulkanInstanceAPI(VkInstance instance); bool loadVulkanDeviceAPI(VkDevice device);

懂了,原來我的函數名忘了改, 每次改名都要逐個地方改

, 感謝, 結帖[/quote] 每次改名都要逐个地方改，说明你的函数命名有问题，可以考虑用namespace[/quote]我想不到函數或者變量叫甚麼名好就隨便打, 改天想到更適合的就想改, 但全部有引用過的地方, 聲明和定義都要改一遍

[/quote] 名字尽量短，怕重名外面包个namespace, 函数名一般是动词，类名是名词. 而且c++有函数重载，可以同名。比如上面这三个函数，可以都改名为load

a784063999 2016-12-27

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引用 8 楼 ipqtjmqj 的回复:

[quote=引用 7 楼 a784063999 的回复:] [quote=引用 6 楼 ipqtjmqj 的回复:] 你在loadVulkanAPI.cpp中有定义下面三个函数吗 bool loadVulkanBaseAPI(); bool loadVulkanInstanceAPI(VkInstance instance); bool loadVulkanDeviceAPI(VkDevice device);

懂了,原來我的函數名忘了改, 每次改名都要逐個地方改

ipqtjmqj 2016-12-27

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引用 7 楼 a784063999 的回复:

[quote=引用 6 楼 ipqtjmqj 的回复:] 你在loadVulkanAPI.cpp中有定义下面三个函数吗 bool loadVulkanBaseAPI(); bool loadVulkanInstanceAPI(VkInstance instance); bool loadVulkanDeviceAPI(VkDevice device);

懂了,原來我的函數名忘了改, 每次改名都要逐個地方改

, 感謝, 結帖[/quote] 每次改名都要逐个地方改，说明你的函数命名有问题，可以考虑用namespace

a784063999 2016-12-27