loader: link with OneCore umbrella library

This change makes loader use OneCore umbrella[2] library, common
to all Windows 10 devices and required with for Universal
Windows drivers[1].

As this change may not be compatible with previous versions of
Windows, it's enabled via CMAKE option:
   -DENABLE_WIN10_ONECORE=1

[2] https://msdn.microsoft.com/en-us/library/windows/desktop/mt654039(v=vs.85).aspx
[1] https://docs.microsoft.com/en-us/windows-hardware/drivers/develop/getting-started-with-universal-drivers

Change-Id: Ib677face131ab2edb3e8cd2f764fe4e0ca44cecc

3 files changed, 19 insertions, 6 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 26808788c..5cf85d487 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -112,6 +112,7 @@ else()
     # is WIN32
     option(DISABLE_BUILD_PATH_DECORATION "Disable the decoration of the gslang and SPIRV-Tools build path with MSVC build type info" OFF)
     option(DISABLE_BUILDTGT_DIR_DECORATION "Disable the decoration of the gslang and SPIRV-Tools build path with target info" OFF)
+    option(ENABLE_WIN10_ONECORE "Link the loader with OneCore umbrella libraries" OFF)
 
     # For Windows, since 32-bit and 64-bit items can co-exist, we build each in its own build directory.
     # 32-bit target data goes in build32, and 64-bit target data goes into build.  So, include/link the
diff --git a/loader/CMakeLists.txt b/loader/CMakeLists.txt
index 6282bac6c..85282d036 100644
--- a/loader/CMakeLists.txt
+++ b/loader/CMakeLists.txt
@@ -149,6 +149,12 @@ if (WIN32)
         endif()
     endforeach()
 
+    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 kernel32.lib). 
+        set(CMAKE_CXX_STANDARD_LIBRARIES " ") # space is intentional
+        set(CMAKE_C_STANDARD_LIBRARIES ${CMAKE_CXX_STANDARD_LIBRARIES})
+    endif()
+
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_CRT_SECURE_NO_WARNINGS")
     # Build dev_ext_trampoline.c with -O2 to allow tail-call optimization.
     # Build other C files with normal options
@@ -180,7 +186,14 @@ if (WIN32)
     # Suppress conflicting libs warning for debug builds.
     set_target_properties(${API_LOWERCASE}-${MAJOR} PROPERTIES LINK_FLAGS_DEBUG /ignore:4098)
     set_target_properties(VKstatic.${MAJOR} PROPERTIES OUTPUT_NAME VKstatic.${MAJOR})
-    target_link_libraries(${API_LOWERCASE}-${MAJOR} Cfgmgr32)
+
+    if (ENABLE_WIN10_ONECORE)
+        target_link_libraries(${API_LOWERCASE}-${MAJOR} OneCoreUAP.lib LIBCMT.LIB LIBCMTD.LIB LIBVCRUNTIME.LIB LIBUCRT.LIB)
+        set_target_properties(${API_LOWERCASE}-${MAJOR} PROPERTIES LINK_FLAGS   "/NODEFAULTLIB")
+    else()
+        target_link_libraries(${API_LOWERCASE}-${MAJOR} Cfgmgr32)
+    endif()
+
     add_dependencies(${API_LOWERCASE}-${MAJOR} generate_helper_files loader_gen_files loader_asm_gen_files)
 
     if (CMAKE_GENERATOR MATCHES "^Visual Studio.*")
diff --git a/loader/loader.c b/loader/loader.c
index 543b9657b..dcb2ef1ed 100644
--- a/loader/loader.c
+++ b/loader/loader.c
@@ -543,11 +543,11 @@ out:
 // *reg_data contains a string list of filenames as pointer.
 // When done using the returned string list, the caller should free the pointer.
 VkResult loaderGetDeviceRegistryFiles(const struct loader_instance *inst, char **reg_data, PDWORD reg_data_size, LPCTSTR value_name) {
-    static const wchar_t* softwareComponentGUID = L"{5c4c3332-344d-483c-8739-259e934c9cc8}";
-    static const wchar_t* displayGUID = L"{4d36e968-e325-11ce-bfc1-08002be10318}";
+    static const wchar_t *softwareComponentGUID = L"{5c4c3332-344d-483c-8739-259e934c9cc8}";
+    static const wchar_t *displayGUID = L"{4d36e968-e325-11ce-bfc1-08002be10318}";
     const ULONG flags = CM_GETIDLIST_FILTER_CLASS | CM_GETIDLIST_FILTER_PRESENT;
-   
-    wchar_t childGuid[MAX_GUID_STRING_LEN + 2]; // +2 for brackets {}
+
+    wchar_t childGuid[MAX_GUID_STRING_LEN + 2];  // +2 for brackets {}
     ULONG childGuidSize = sizeof(childGuid);
 
     DEVINST devID = 0, childID = 0;
@@ -579,7 +579,6 @@ VkResult loaderGetDeviceRegistryFiles(const struct loader_instance *inst, char *
     } while (CM_Get_Device_ID_ListW(displayGUID, pDeviceNames, deviceNamesSize, flags) == CR_BUFFER_SMALL);
 
     if (pDeviceNames) {
-
         for (wchar_t *deviceName = pDeviceNames; *deviceName; deviceName += wcslen(deviceName) + 1) {
             CONFIGRET status = CM_Locate_DevNodeW(&devID, deviceName, CM_LOCATE_DEVNODE_NORMAL);
             if (CR_SUCCESS != status) {