Support tests on windows with clang & clang-cl

Required adding a .def file to properly export the required symbols and
disabling pointer cast warnings that are coming from Catch2.

tests/CMakeLists.txt

@@ -12,7 +12,14 @@ target_link_libraries(VulkanMock
         vk-bootstrap-compiler-warnings
 )
 target_compile_features(VulkanMock PUBLIC cxx_std_17)
-target_compile_definitions(VulkanMock PUBLIC VK_NO_PROTOTYPES)
+target_compile_definitions(VulkanMock PUBLIC VK_NO_PROTOTYPES COMPILING_DLL)
+if(WIN32)
+    if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC" OR CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "MSVC")
+        target_link_options(VulkanMock PRIVATE /DEF:${CMAKE_CURRENT_SOURCE_DIR}/vulkan_mock.def)
+    elseif (CMAKE_CXX_COMPILER_FRONTEND_VARIANT MATCHES "GNU")
+        target_link_options(VulkanMock PRIVATE -Wl,/DEF:${CMAKE_CURRENT_SOURCE_DIR}/vulkan_mock.def)
+    endif()
+endif()
 
 add_executable(vk-bootstrap-test
     vulkan_library_loader.hpp
@@ -37,6 +44,10 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
     target_compile_options(vk-bootstrap-test PRIVATE /wd4996)
 endif()
 
+if (WIN32 AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    target_compile_options(vk-bootstrap-compiler-warnings INTERFACE -Wno-microsoft-cast)
+endif()
+
 list(APPEND CMAKE_MODULE_PATH ${Catch2_SOURCE_DIR}/extras)
 include(Catch)
 catch_discover_tests(vk-bootstrap-test)

tests/bootstrap_tests.cpp

@@ -25,7 +25,7 @@ VkExtensionProperties get_extension_properties(const char* extName) {
 }
 
 VulkanMock& get_and_setup_default() {
-    VulkanMock& mock = get_vulkan_mock();
+    VulkanMock& mock = *get_vulkan_mock();
     mock.instance_extensions.push_back(get_extension_properties(VK_KHR_SURFACE_EXTENSION_NAME));
 #if defined(_WIN32)
     mock.instance_extensions.push_back(get_extension_properties("VK_KHR_win32_surface"));
@@ -512,7 +512,7 @@ TEST_CASE("SystemInfo Loading Vulkan Automatically", "[VkBootstrap.loading]") {
 TEST_CASE("SystemInfo Loading Vulkan Manually", "[VkBootstrap.loading]") {
     [[maybe_unused]] VulkanMock& mock = get_and_setup_default();
     VulkanLibrary vk_lib;
-    REQUIRE(vk_lib.vkGetInstanceProcAddr != NULL);
+    REQUIRE(vk_lib.vkGetInstanceProcAddr);
     auto info_ret = vkb::SystemInfo::get_system_info(vk_lib.vkGetInstanceProcAddr);
     REQUIRE(info_ret);
     vkb::InstanceBuilder builder;
@@ -531,7 +531,7 @@ TEST_CASE("InstanceBuilder Loading Vulkan Automatically", "[VkBootstrap.loading]
 TEST_CASE("InstanceBuilder Loading Vulkan Manually", "[VkBootstrap.loading]") {
     [[maybe_unused]] VulkanMock& mock = get_and_setup_default();
     VulkanLibrary vk_lib;
-    REQUIRE(vk_lib.vkGetInstanceProcAddr != NULL);
+    REQUIRE(vk_lib.vkGetInstanceProcAddr);
     vkb::InstanceBuilder builder{ vk_lib.vkGetInstanceProcAddr };
     auto ret = builder.build();
     vk_lib.close();
@@ -554,15 +554,15 @@ TEST_CASE("ReLoading Vulkan Manually", "[VkBootstrap.loading]") {
     [[maybe_unused]] VulkanMock& mock = get_and_setup_default();
     {
         VulkanLibrary vk_lib;
-        REQUIRE(vk_lib.vkGetInstanceProcAddr != NULL);
+        REQUIRE(vk_lib.vkGetInstanceProcAddr);
         vkb::InstanceBuilder builder{ vk_lib.vkGetInstanceProcAddr };
         auto ret = builder.build();
         REQUIRE(ret);
         vk_lib.close();
     }
     {
         VulkanLibrary vk_lib;
-        REQUIRE(vk_lib.vkGetInstanceProcAddr != NULL);
+        REQUIRE(vk_lib.vkGetInstanceProcAddr);
         vkb::InstanceBuilder builder{ vk_lib.vkGetInstanceProcAddr };
         auto ret = builder.build();
         REQUIRE(ret);
@@ -643,7 +643,7 @@ TEST_CASE("Passing vkb classes to Vulkan handles", "[VkBootstrap.pass_class_to_h
 
         // Check if we can get instance functions.
         PFN_vkVoidFunction instanceFunction = instance.fp_vkGetInstanceProcAddr(instance, "vkEnumeratePhysicalDevices"); // validation layers should be provided.
-        REQUIRE(instanceFunction != NULL);
+        REQUIRE(instanceFunction);
 
         vkb::PhysicalDeviceSelector physicalDeviceSelector(instance);
         auto physicalDevice =
@@ -655,7 +655,7 @@ TEST_CASE("Passing vkb classes to Vulkan handles", "[VkBootstrap.pass_class_to_h
 
         // Check if we can get a device function address, passing vkb::Device to the function.
         PFN_vkVoidFunction deviceFunction = instance.fp_vkGetDeviceProcAddr(device.value(), "vkAcquireNextImageKHR");
-        REQUIRE(deviceFunction != NULL);
+        REQUIRE(deviceFunction);
     }
 }
 

tests/vulkan_mock.cpp

@@ -17,9 +17,11 @@
 
 VulkanMock mock;
 
-EXPORT_MACRO VulkanMock& get_vulkan_mock() {
+extern "C" {
+VulkanMock* get_vulkan_mock() {
     mock = VulkanMock{};
-    return mock;
+    return &mock;
+}
 }
 
 template <typename T> VkResult fill_out_count_pointer_pair(std::vector<T> const& data_vec, uint32_t* pCount, T* pData) {
@@ -368,13 +370,9 @@ PFN_vkVoidFunction shim_vkGetInstanceProcAddr([[maybe_unused]] VkInstance instan
 }
 
 extern "C" {
-#if defined(WIN32)
-
-EXPORT_MACRO VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vkGetInstanceProcAddr(VkInstance instance, const char* pName) {
-#pragma comment(linker, "/EXPORT:" __FUNCTION__ "=" __FUNCDNAME__)
+VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vkGetInstanceProcAddr(VkInstance instance, const char* pName) {
     return shim_vkGetInstanceProcAddr(instance, pName);
 }
-#endif
 
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__GNU__)
 #define DLSYM_FUNC_NAME dlsym

tests/vulkan_mock.def

@@ -0,0 +1,4 @@
+LIBRARY vulkan-1
+EXPORTS
+get_vulkan_mock
+vkGetInstanceProcAddr

tests/vulkan_mock.hpp

@@ -91,12 +91,6 @@ struct VulkanMock {
     }
 };
 
-#if !defined(EXPORT_MACRO)
-#if defined(WIN32)
-#define EXPORT_MACRO __declspec(dllexport)
-#else
-#define EXPORT_MACRO
-#endif
-#endif
-
-EXPORT_MACRO VulkanMock& get_vulkan_mock();
+extern "C" {
+VulkanMock* get_vulkan_mock();
+}