vulkan vkresult linker error msvc - c++

Question

I'm trying to compile the first sample program included in vulkan, so I pasted it into a new win32 project in the vs17 rc. It is called 01-init_instance in the Samples dir. I am compiling x86.
#include <iostream>
#include <cstdlib>
#include <util_init.hpp>
#define APP_SHORT_NAME "vulkansamples_instance"
int main(int argc, char *argv[]) {
struct sample_info info = {};
init_global_layer_properties(info);
/* VULKAN_KEY_START */
// initialize the VkApplicationInfo structure
VkApplicationInfo app_info = {};
app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
app_info.pNext = NULL;
app_info.pApplicationName = APP_SHORT_NAME;
app_info.applicationVersion = 1;
app_info.pEngineName = APP_SHORT_NAME;
app_info.engineVersion = 1;
app_info.apiVersion = VK_API_VERSION_1_0;
// initialize the VkInstanceCreateInfo structure
VkInstanceCreateInfo inst_info = {};
inst_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
inst_info.pNext = NULL;
inst_info.flags = 0;
inst_info.pApplicationInfo = &app_info;
inst_info.enabledExtensionCount = 0;
inst_info.ppEnabledExtensionNames = NULL;
inst_info.enabledLayerCount = 0;
inst_info.ppEnabledLayerNames = NULL;
VkInstance inst;
VkResult res;
res = vkCreateInstance(&inst_info, NULL, &inst);
if (res == VK_ERROR_INCOMPATIBLE_DRIVER) {
std::cout << "cannot find a compatible Vulkan ICD\n";
exit(-1);
}
else if (res) {
std::cout << "unknown error\n";
exit(-1);
}
vkDestroyInstance(inst, NULL);
/* VULKAN_KEY_END */
return 0;
}
I have done the project properties like:
I had this wrong and was getting linker errors for vkCreateInstance not being resolved (before adding the .lib in dependencies) now I am getting a single, different, linker error for not finding vkResult. This confuses me because I don't know how it could resolve vkcreate but not vkresult. I used all the charset settings (multi-byte, not unicode as normal) but that didn't change anything.
The error is:
Error LNK2019 unresolved external symbol "enum VkResult __cdecl init_global_layer_properties(struct sample_info &)" (?init_global_layer_properties##YA?AW4VkResult##AAUsample_info###Z) referenced in function _main vktest C:\Users\user\Documents\Visual Studio 2017\Projects\vktest\vktest\Source.obj 1

Answer 1

The samples that come with the Vulkan SDK compile the utils folder into a static library, and link with that library. This is where the init_global_layer_properties function exists. If you don't link your sample with that library also, you will get unresolved symbols.