VS: Teach VS >= 10 to recognize CMAKE_SYSTEM_NAME 'Android'

When CMAKE_SYSTEM_NAME is 'Android', check for an installation of
'NVIDIA Nsight Tegra Visual Studio Edition' and generate .vcxproj
files for the "Tegra-Android" platform.  Also make the installed
version available in a CMAKE_VS_NsightTegra_VERSION variable.

Help/manual/cmake-variables.7.rst

@@ -74,6 +74,7 @@ Variables that Provide Information
    /variable/CMAKE_VS_INTEL_Fortran_PROJECT_VERSION
    /variable/CMAKE_VS_MSBUILD_COMMAND
    /variable/CMAKE_VS_MSDEV_COMMAND
+   /variable/CMAKE_VS_NsightTegra_VERSION
    /variable/CMAKE_VS_PLATFORM_NAME
    /variable/CMAKE_VS_PLATFORM_TOOLSET
    /variable/CMAKE_XCODE_PLATFORM_TOOLSET

Help/variable/CMAKE_VS_NsightTegra_VERSION.rst

@@ -0,0 +1,7 @@
+CMAKE_VS_NsightTegra_VERSION
+----------------------------
+
+When using a Visual Studio generator with the
+:variable:`CMAKE_SYSTEM_NAME` variable set to ``Android``,
+this variable contains the version number of the
+installed NVIDIA Nsight Tegra Visual Studio Edition.

Source/cmGlobalVisualStudio10Generator.cxx

@@ -198,6 +198,31 @@ bool cmGlobalVisualStudio10Generator::InitializeSystem(cmMakefile* mf)
       return false;
       }
     }
+  else if(this->SystemName == "Android")
+    {
+    if(this->DefaultPlatformName != "Win32")
+      {
+      cmOStringStream e;
+      e << "CMAKE_SYSTEM_NAME is 'Android' but CMAKE_GENERATOR "
+        << "specifies a platform too: '" << this->GetName() << "'";
+      mf->IssueMessage(cmake::FATAL_ERROR, e.str());
+      return false;
+      }
+    std::string v = this->GetInstalledNsightTegraVersion();
+    if(v.empty())
+      {
+      mf->IssueMessage(cmake::FATAL_ERROR,
+        "CMAKE_SYSTEM_NAME is 'Android' but "
+        "'NVIDIA Nsight Tegra Visual Studio Edition' "
+        "is not installed.");
+      return false;
+      }
+    this->DefaultPlatformName = "Tegra-Android";
+    this->DefaultPlatformToolset = "Default";
+    this->NsightTegraVersion = v;
+    mf->AddDefinition("CMAKE_VS_NsightTegra_VERSION", v.c_str());
+    }
+
   return true;
 }
 
@@ -587,3 +612,19 @@ bool cmGlobalVisualStudio10Generator::UseFolderProperty()
 {
   return IsExpressEdition() ? false : cmGlobalGenerator::UseFolderProperty();
 }
+
+//----------------------------------------------------------------------------
+bool cmGlobalVisualStudio10Generator::IsNsightTegra() const
+{
+  return !this->NsightTegraVersion.empty();
+}
+
+//----------------------------------------------------------------------------
+std::string cmGlobalVisualStudio10Generator::GetInstalledNsightTegraVersion()
+{
+  std::string version;
+  cmSystemTools::ReadRegistryValue(
+    "HKEY_LOCAL_MACHINE\\SOFTWARE\\NVIDIA Corporation\\Nsight Tegra;"
+    "Version", version, cmSystemTools::KeyWOW64_32);
+  return version;
+}

Source/cmGlobalVisualStudio10Generator.h

@@ -59,6 +59,9 @@ public:
   /** Is the installed VS an Express edition?  */
   bool IsExpressEdition() const { return this->ExpressEdition; }
 
+  /** Generating for Nsight Tegra VS plugin?  */
+  bool IsNsightTegra() const;
+
   /** The toolset name for the target platform.  */
   const char* GetPlatformToolset() const;
 
@@ -106,6 +109,8 @@ public:
 
   virtual void FindMakeProgram(cmMakefile*);
 
+  static std::string GetInstalledNsightTegraVersion();
+
 protected:
   virtual void Generate();
   virtual bool InitializeSystem(cmMakefile* mf);
@@ -124,6 +129,7 @@ protected:
   std::string DefaultPlatformToolset;
   std::string SystemName;
   std::string SystemVersion;
+  std::string NsightTegraVersion;
   bool SystemIsWindowsCE;
   bool SystemIsWindowsPhone;
   bool SystemIsWindowsStore;