From 1733181194d4f356e599a748c6d8c5009541604f Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Mon, 7 Sep 2020 20:07:39 +0200
Subject: [PATCH 2/4] Fixes for MinGW build

Adapted from https://github.com/msys2/MINGW-packages/blob/348f1d46d9d273a2cc928deadf9d9114f7a69c2f/mingw-w64-vulkan-loader/002-proper-def-files-for-32bit.patch
---
 loader/CMakeLists.txt          | 6 ++++--
 loader/loader.h                | 4 +++-
 tests/layers/vk_format_utils.h | 4 +++-
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/loader/CMakeLists.txt b/loader/CMakeLists.txt
index 04faf23cc..b5f90393d 100644
--- a/loader/CMakeLists.txt
+++ b/loader/CMakeLists.txt
@@ -67,6 +67,7 @@ set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG")
 
 if(WIN32)
     # Use static MSVCRT libraries
+    if(MSVC)
     foreach(configuration
             in
             CMAKE_C_FLAGS_DEBUG
@@ -85,6 +86,7 @@ if(WIN32)
                            "${${configuration}}")
         endif()
     endforeach()
+    endif()
 
     if(ENABLE_WIN10_ONECORE)
         # Note: When linking your app or driver to OneCore.lib, be sure to remove any links to non-umbrella libs (such as
@@ -231,7 +233,7 @@ if(WIN32)
                                      "")
     target_link_libraries(vulkan Vulkan::Headers)
 
-    if(ENABLE_WIN10_ONECORE)
+    if(ENABLE_WIN10_ONECORE AND MSVC)
         target_link_libraries(vulkan OneCoreUAP.lib LIBCMT.LIB LIBCMTD.LIB LIBVCRUNTIME.LIB LIBUCRT.LIB)
         set_target_properties(vulkan PROPERTIES LINK_FLAGS "/NODEFAULTLIB")
     else()
@@ -318,11 +320,11 @@ else()
         )
 # cmake-format: on
     endif()
+endif()
 
     if(NOT APPLE)
         target_compile_definitions(vulkan PRIVATE _XOPEN_SOURCE=500) # hush compiler warnings for readlink
     endif()
-endif()
 
 # Generate pkg-config file.
 include(FindPkgConfig QUIET)
diff --git a/loader/loader.h b/loader/loader.h
index ea0c976b5..64ad08693 100644
--- a/loader/loader.h
+++ b/loader/loader.h
@@ -38,7 +38,9 @@
 #include "vk_layer_dispatch_table.h"
 #include "vk_loader_extensions.h"
 
-#if defined(__GNUC__) && __GNUC__ >= 4
+#if defined(_WIN32)
+#define LOADER_EXPORT __declspec(dllexport)
+#elif defined(__GNUC__) && __GNUC__ >= 4
 #define LOADER_EXPORT __attribute__((visibility("default")))
 #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)
 #define LOADER_EXPORT __attribute__((visibility("default")))
diff --git a/tests/layers/vk_format_utils.h b/tests/layers/vk_format_utils.h
index e76f9ec2f..ef06e12af 100644
--- a/tests/layers/vk_format_utils.h
+++ b/tests/layers/vk_format_utils.h
@@ -25,7 +25,9 @@
 #include "vulkan/vulkan.h"
 
 #if !defined(VK_LAYER_EXPORT)
-#if defined(__GNUC__) && __GNUC__ >= 4
+#if defined(_WIN32)
+#define VK_LAYER_EXPORT __declspec(dllexport)
+#elif defined(__GNUC__) && __GNUC__ >= 4
 #define VK_LAYER_EXPORT __attribute__((visibility("default")))
 #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)
 #define VK_LAYER_EXPORT __attribute__((visibility("default")))
-- 
2.25.1