From 4b8b91688f2b2fd18a2bda182dd8a1c7a201ff3d Mon Sep 17 00:00:00 2001
From: Gilles Khouzam <gillesk@microsoft.com>
Date: Tue, 1 Sep 2015 13:52:36 -0700
Subject: [PATCH] VS: Find Desktop SDK for current VS version (#15662)

Determine the Desktop SDK for Windows Phone and Windows Store from the
generator instead of the version of the targeted app.  This allows to
build a Windows Phone 8.1 app on VS 2015 for example.
---
 Source/cmGlobalVisualStudio11Generator.h   |  5 ++++-
 Source/cmGlobalVisualStudio12Generator.h   |  5 ++++-
 Source/cmGlobalVisualStudio14Generator.cxx | 13 +++++++++++++
 Source/cmGlobalVisualStudio14Generator.h   |  5 +++++
 4 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/Source/cmGlobalVisualStudio11Generator.h b/Source/cmGlobalVisualStudio11Generator.h
index b50f4c9a0..9499d801f 100644
--- a/Source/cmGlobalVisualStudio11Generator.h
+++ b/Source/cmGlobalVisualStudio11Generator.h
@@ -34,9 +34,12 @@ protected:
   virtual bool SelectWindowsPhoneToolset(std::string& toolset) const;
   virtual bool SelectWindowsStoreToolset(std::string& toolset) const;
 
+  // Used to verify that the Desktop toolset for the current generator is
+  // installed on the machine.
+  virtual bool IsWindowsDesktopToolsetInstalled() const;
+
   // These aren't virtual because we need to check if the selected version
   // of the toolset is installed
-  bool IsWindowsDesktopToolsetInstalled() const;
   bool IsWindowsPhoneToolsetInstalled() const;
   bool IsWindowsStoreToolsetInstalled() const;
 
diff --git a/Source/cmGlobalVisualStudio12Generator.h b/Source/cmGlobalVisualStudio12Generator.h
index bce9e0cdf..a7939aab6 100644
--- a/Source/cmGlobalVisualStudio12Generator.h
+++ b/Source/cmGlobalVisualStudio12Generator.h
@@ -38,9 +38,12 @@ protected:
   virtual bool SelectWindowsPhoneToolset(std::string& toolset) const;
   virtual bool SelectWindowsStoreToolset(std::string& toolset) const;
 
+  // Used to verify that the Desktop toolset for the current generator is
+  // installed on the machine.
+  virtual bool IsWindowsDesktopToolsetInstalled() const;
+
   // These aren't virtual because we need to check if the selected version
   // of the toolset is installed
-  bool IsWindowsDesktopToolsetInstalled() const;
   bool IsWindowsPhoneToolsetInstalled() const;
   bool IsWindowsStoreToolsetInstalled() const;
   virtual const char* GetIDEVersion() { return "12.0"; }
diff --git a/Source/cmGlobalVisualStudio14Generator.cxx b/Source/cmGlobalVisualStudio14Generator.cxx
index 2cf55d434..d73eedf92 100644
--- a/Source/cmGlobalVisualStudio14Generator.cxx
+++ b/Source/cmGlobalVisualStudio14Generator.cxx
@@ -124,3 +124,16 @@ void cmGlobalVisualStudio14Generator::WriteSLNHeader(std::ostream& fout)
     fout << "# Visual Studio 14\n";
     }
 }
+
+//----------------------------------------------------------------------------
+bool
+cmGlobalVisualStudio14Generator::IsWindowsDesktopToolsetInstalled() const
+{
+  const char desktop10Key[] =
+    "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\"
+    "VisualStudio\\14.0\\VC\\Runtimes";
+
+  std::vector<std::string> vc14;
+  return cmSystemTools::GetRegistrySubKeys(desktop10Key,
+    vc14, cmSystemTools::KeyWOW64_32);
+}
diff --git a/Source/cmGlobalVisualStudio14Generator.h b/Source/cmGlobalVisualStudio14Generator.h
index aa817be43..02c6274f5 100644
--- a/Source/cmGlobalVisualStudio14Generator.h
+++ b/Source/cmGlobalVisualStudio14Generator.h
@@ -31,6 +31,11 @@ public:
   virtual const char* GetToolsVersion() { return "14.0"; }
 protected:
   virtual const char* GetIDEVersion() { return "14.0"; }
+
+  // Used to verify that the Desktop toolset for the current generator is
+  // installed on the machine.
+  virtual bool IsWindowsDesktopToolsetInstalled() const;
+
 private:
   class Factory;
 };