VS: Add CMAKE_VS_PLATFORM_NAME definition to cmMakefile

When adding more platforms to the Visual Studio generators a simple
regular expressing can not handle all cases anymore. This new
define holds the name of the Visual Studio target platform.

Modules/CMakeDetermineCompilerId.cmake

@@ -107,11 +107,14 @@ Id flags: ${testflags}
 ")
 
   # Compile the compiler identification source.
-  if("${CMAKE_GENERATOR}" MATCHES "Visual Studio ([0-9]+)( .NET)?( 200[358])? *((Win64|IA64|ARM))?")
+  if("${CMAKE_GENERATOR}" MATCHES "Visual Studio ([0-9]+)")
     set(vs_version ${CMAKE_MATCH_1})
-    set(vs_arch ${CMAKE_MATCH_4})
+    set(id_arch ${CMAKE_VS_PLATFORM_NAME})
     set(id_lang "${lang}")
     set(id_cl cl.exe)
+    if(NOT id_arch)
+      set(id_arch Win32)
+    endif()
     if(NOT "${vs_version}" VERSION_LESS 10)
       set(v 10)
       set(ext vcxproj)
@@ -123,16 +126,14 @@ Id flags: ${testflags}
       set(v 6)
       set(ext dsp)
     endif()
-    if("${vs_arch}" STREQUAL "Win64")
+    if("${id_arch}" STREQUAL "x64")
       set(id_machine_10 MachineX64)
-      set(id_arch x64)
-    elseif("${vs_arch}" STREQUAL "IA64")
+    elseif("${id_arch}" STREQUAL "Itanium")
       set(id_machine_10 MachineIA64)
       set(id_arch ia64)
     else()
       set(id_machine_6 x86)
       set(id_machine_10 MachineX86)
-      set(id_arch Win32)
     endif()
     if(CMAKE_VS_PLATFORM_TOOLSET)
       set(id_toolset "<PlatformToolset>${CMAKE_VS_PLATFORM_TOOLSET}</PlatformToolset>")

Source/cmGlobalVisualStudio8Generator.cxx

@@ -98,6 +98,13 @@ cmLocalGenerator *cmGlobalVisualStudio8Generator::CreateLocalGenerator()
   return lg;
 }
 
+//----------------------------------------------------------------------------
+void cmGlobalVisualStudio8Generator::AddPlatformDefinitions(cmMakefile* mf)
+{
+  cmGlobalVisualStudio71Generator::AddPlatformDefinitions(mf);
+  mf->AddDefinition("CMAKE_VS_PLATFORM_NAME", this->GetPlatformName());
+}
+
 //----------------------------------------------------------------------------
 // ouput standard header for dsw file
 void cmGlobalVisualStudio8Generator::WriteSLNHeader(std::ostream& fout)

Source/cmGlobalVisualStudio8Generator.h

@@ -38,6 +38,8 @@ public:
   ///! Create a local generator appropriate to this Global Generator
   virtual cmLocalGenerator *CreateLocalGenerator();
 
+  virtual void AddPlatformDefinitions(cmMakefile* mf);
+
   /**
    * Override Configure and Generate to add the build-system check
    * target.