VS11: Add VS 2012 Express support (#13348)

Use the registry entries that vsvars32.bat uses to detect the location of
MSBuild.exe in the framework directory.  Invoke MSBuild with the option

 /p:VisualStudioVersion=$version

so it knows from which VS version to load the system build rules.  Teach
cmGlobalVisualStudio11Generator to set its ExpressEdition member using the
registry.

1 files changed, 2 insertions, 0 deletions

diff --git a/Source/cmGlobalVisualStudio10Generator.cxx b/Source/cmGlobalVisualStudio10Generator.cxx
index d188980..480c577 100644
--- a/Source/cmGlobalVisualStudio10Generator.cxx
+++ b/Source/cmGlobalVisualStudio10Generator.cxx
@@ -205,6 +205,8 @@ std::string cmGlobalVisualStudio10Generator
     {
     makeCommand += "Debug";
     }
+  makeCommand += " /p:VisualStudioVersion=";
+  makeCommand += this->GetIDEVersion();
   if ( additionalOptions )
     {
     makeCommand += " ";