VS: Model a default target framework

Add fields to the VS generator to select a target framework.
Migrate the existing default for VS 12 .NET CF for Windows CE.

Report the values in `CMAKE_VS_*` variables and use them for
the CSharp compiler id project too.

Issue: #22849

1 files changed, 10 insertions, 0 deletions

diff --git a/Source/cmGlobalVisualStudio8Generator.h b/Source/cmGlobalVisualStudio8Generator.h
index 96e3553..b6ecdf0 100644
--- a/Source/cmGlobalVisualStudio8Generator.h
+++ b/Source/cmGlobalVisualStudio8Generator.h
@@ -2,6 +2,8 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #pragma once
 
+#include <cm/optional>
+
 #include "cmGlobalVisualStudio71Generator.h"
 
 /** \class cmGlobalVisualStudio8Generator
@@ -24,6 +26,10 @@ public:
 
   bool SetGeneratorPlatform(std::string const& p, cmMakefile* mf) override;
 
+  cm::optional<std::string> const& GetTargetFrameworkVersion() const;
+  cm::optional<std::string> const& GetTargetFrameworkIdentifier() const;
+  cm::optional<std::string> const& GetTargetFrameworkTargetsVersion() const;
+
   /**
    * Override Configure and Generate to add the build-system check
    * target.
@@ -76,4 +82,8 @@ protected:
 
   std::string Name;
   std::string WindowsCEVersion;
+
+  cm::optional<std::string> DefaultTargetFrameworkVersion;
+  cm::optional<std::string> DefaultTargetFrameworkIdentifier;
+  cm::optional<std::string> DefaultTargetFrameworkTargetsVersion;
 };