Add preliminary support for arm-windows and arm64-windows triplets (#2371)

* Add preliminary support for arm-windows and arm64-windows triplets

Visual Studio 15.4 shipped with new VC tools targeting arm and arm64
for desktop. This change allows for recognition and usage of new
triplets supporting arm and arm64 Windows desktop and server targets.

* Remove unnecessary changes

* Part 2

* Part 3

* Make detection of Arm64 _VCPKG_TARGET_ARCHITECTURE precise

* Enforce usage of Visual Studio CMake generatorfor arm and temporarily arm64 targets

* Address code review feedback, clean libjpeg-turbo port.cmake

* [libjpeg-turbo][tiff] Reduce changes to existing libraries.

* [vcpkg-cmake] Simplify toolchain selection logic and improve comments

3 files changed, 38 insertions, 19 deletions

diff --git a/scripts/buildsystems/msbuild/vcpkg.targets b/scripts/buildsystems/msbuild/vcpkg.targets
index 092e013b5..499052e4d 100644
--- a/scripts/buildsystems/msbuild/vcpkg.targets
+++ b/scripts/buildsystems/msbuild/vcpkg.targets
@@ -24,6 +24,16 @@
     <VcpkgTriplet Condition="'$(VcpkgTriplet)' == ''">x64-windows</VcpkgTriplet>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(Platform)|$(ApplicationType)|$(ApplicationTypeRevision)' == 'arm||'">
+    <VcpkgEnabled Condition="'$(VcpkgEnabled)' == ''">true</VcpkgEnabled>
+    <VcpkgTriplet Condition="'$(VcpkgTriplet)' == ''">arm-windows</VcpkgTriplet>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Platform)|$(ApplicationType)|$(ApplicationTypeRevision)' == 'arm64||'">
+    <VcpkgEnabled Condition="'$(VcpkgEnabled)' == ''">true</VcpkgEnabled>
+    <VcpkgTriplet Condition="'$(VcpkgTriplet)' == ''">arm64-windows</VcpkgTriplet>
+  </PropertyGroup>  
+
   <PropertyGroup Condition="'$(Platform)|$(ApplicationType)|$(ApplicationTypeRevision)' == 'x64|Windows Store|10.0'">
     <VcpkgEnabled Condition="'$(VcpkgEnabled)' == ''">true</VcpkgEnabled>
     <VcpkgTriplet Condition="'$(VcpkgTriplet)' == ''">x64-uwp</VcpkgTriplet>
@@ -34,6 +44,11 @@
     <VcpkgTriplet Condition="'$(VcpkgTriplet)' == ''">arm-uwp</VcpkgTriplet>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(Platform)|$(ApplicationType)|$(ApplicationTypeRevision)' == 'arm64|Windows Store|10.0'">
+    <VcpkgEnabled Condition="'$(VcpkgEnabled)' == ''">true</VcpkgEnabled>
+    <VcpkgTriplet Condition="'$(VcpkgTriplet)' == ''">arm64-uwp</VcpkgTriplet>
+  </PropertyGroup>  
+
   <PropertyGroup Condition="'$(VcpkgEnabled)' == 'true'">
     <VcpkgConfiguration Condition="'$(VcpkgConfiguration)' == ''">$(Configuration)</VcpkgConfiguration>
     <VcpkgNormalizedConfiguration Condition="$(VcpkgConfiguration.StartsWith('Debug'))">Debug</VcpkgNormalizedConfiguration>
diff --git a/scripts/buildsystems/vcpkg.cmake b/scripts/buildsystems/vcpkg.cmake
index 7ebe695fb..f157d3236 100644
--- a/scripts/buildsystems/vcpkg.cmake
+++ b/scripts/buildsystems/vcpkg.cmake
@@ -22,6 +22,8 @@ elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Xx]64$")
     set(_VCPKG_TARGET_TRIPLET_ARCH x64)
 elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]$")
     set(_VCPKG_TARGET_TRIPLET_ARCH arm)
+elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]64$")
+    set(_VCPKG_TARGET_TRIPLET_ARCH arm64)
 else()
     if(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015 Win64$")
         set(_VCPKG_TARGET_TRIPLET_ARCH x64)
@@ -41,6 +43,8 @@ else()
             set(_VCPKG_TARGET_TRIPLET_ARCH x64)
         elseif(_VCPKG_CL MATCHES "arm/cl.exe$")
             set(_VCPKG_TARGET_TRIPLET_ARCH arm)
+        elseif(_VCPKG_CL MATCHES "arm64/cl.exe$")
+            set(_VCPKG_TARGET_TRIPLET_ARCH arm64)            
         elseif(_VCPKG_CL MATCHES "bin/cl.exe$" OR _VCPKG_CL MATCHES "x86/cl.exe$")
             set(_VCPKG_TARGET_TRIPLET_ARCH x86)
         elseif(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "x86_64")
@@ -105,6 +109,7 @@ if (NOT DEFINED CMAKE_SYSTEM_VERSION AND _VCPKG_TARGET_TRIPLET_PLAT MATCHES "win
     vcpkg_get_windows_sdk(WINDOWS_SDK_VERSION)
     unset(VCPKG_ROOT_DIR)
     set(CMAKE_SYSTEM_VERSION ${WINDOWS_SDK_VERSION} CACHE STRING "Windows SDK version")
+    message(STATUS "Found Windows SDK ${WINDOWS_SDK_VERSION}")
 endif()
 
 file(TO_CMAKE_PATH "$ENV{PROGRAMFILES}" _programfiles)
diff --git a/scripts/cmake/vcpkg_configure_cmake.cmake b/scripts/cmake/vcpkg_configure_cmake.cmake
index 4bcf3d2c9..6e2ec4ef5 100644
--- a/scripts/cmake/vcpkg_configure_cmake.cmake
+++ b/scripts/cmake/vcpkg_configure_cmake.cmake
@@ -57,40 +57,39 @@ function(vcpkg_configure_cmake)
         set(_csc_HOST_ARCHITECTURE $ENV{PROCESSOR_ARCHITECTURE})
     endif()
 
+    set(NINJA_CAN_BE_USED ON)
+    if(_csc_HOST_ARCHITECTURE STREQUAL "x86")
+        # Prebuilt ninja binaries are only provided for x64 hosts
+        set(NINJA_CAN_BE_USED OFF)
+    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
+        # Ninja and MSBuild have many differences when targetting UWP, so use MSBuild to maximize existing compatibility
+        set(NINJA_CAN_BE_USED OFF)
+    elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64" OR VCPKG_TARGET_ARCHITECTURE STREQUAL "arm")
+        # Arm64 usage should be allowed once github issue #2375 is resolved
+        set(NINJA_CAN_BE_USED OFF)
+    endif()
+
     if(_csc_GENERATOR)
         set(GENERATOR ${_csc_GENERATOR})
-    elseif(_csc_PREFER_NINJA AND NOT VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND NOT _csc_HOST_ARCHITECTURE STREQUAL "x86")
+    elseif(_csc_PREFER_NINJA AND NINJA_CAN_BE_USED)
+        set(GENERATOR "Ninja")
+    elseif(VCPKG_CHAINLOAD_TOOLCHAIN_FILE)
         set(GENERATOR "Ninja")
+
     elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "x86" AND VCPKG_PLATFORM_TOOLSET MATCHES "v120")
         set(GENERATOR "Visual Studio 12 2013")
     elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "x64" AND VCPKG_PLATFORM_TOOLSET MATCHES "v120")
         set(GENERATOR "Visual Studio 12 2013 Win64")
     elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "arm" AND VCPKG_PLATFORM_TOOLSET MATCHES "v120")
         set(GENERATOR "Visual Studio 12 2013 ARM")
-    elseif(VCPKG_CHAINLOAD_TOOLCHAIN_FILE)
-        set(GENERATOR "Ninja")
-    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND VCPKG_TARGET_ARCHITECTURE MATCHES "x86" AND VCPKG_PLATFORM_TOOLSET MATCHES "v140")
-        set(GENERATOR "Visual Studio 14 2015")
-    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND VCPKG_TARGET_ARCHITECTURE MATCHES "x64" AND VCPKG_PLATFORM_TOOLSET MATCHES "v140")
-        set(GENERATOR "Visual Studio 14 2015 Win64")
-    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND VCPKG_TARGET_ARCHITECTURE MATCHES "arm" AND VCPKG_PLATFORM_TOOLSET MATCHES "v140")
-        set(GENERATOR "Visual Studio 14 2015 ARM")
+
     elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "x86" AND VCPKG_PLATFORM_TOOLSET MATCHES "v140")
         set(GENERATOR "Visual Studio 14 2015")
     elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "x64" AND VCPKG_PLATFORM_TOOLSET MATCHES "v140")
         set(GENERATOR "Visual Studio 14 2015 Win64")
-    elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "arm" AND VCPKG_PLATFORM_TOOLSET MATCHES "v140")
+    elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm" AND VCPKG_PLATFORM_TOOLSET MATCHES "v140")
         set(GENERATOR "Visual Studio 14 2015 ARM")
 
-    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND VCPKG_TARGET_ARCHITECTURE MATCHES "x86" AND VCPKG_PLATFORM_TOOLSET MATCHES "v141")
-        set(GENERATOR "Visual Studio 15 2017")
-    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND VCPKG_TARGET_ARCHITECTURE MATCHES "x64" AND VCPKG_PLATFORM_TOOLSET MATCHES "v141")
-        set(GENERATOR "Visual Studio 15 2017 Win64")
-    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND VCPKG_TARGET_ARCHITECTURE STREQUAL "arm" AND VCPKG_PLATFORM_TOOLSET MATCHES "v141")
-        set(GENERATOR "Visual Studio 15 2017 ARM")
-    elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64" AND VCPKG_PLATFORM_TOOLSET MATCHES "v141")
-        set(GENERATOR "Visual Studio 15 2017")    
-        set(ARCH "ARM64")
     elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "x86" AND VCPKG_PLATFORM_TOOLSET MATCHES "v141")
         set(GENERATOR "Visual Studio 15 2017")
     elseif(VCPKG_TARGET_ARCHITECTURE MATCHES "x64" AND VCPKG_PLATFORM_TOOLSET MATCHES "v141")