VS: Implement generator toolset selection (#10722, #13774)

Implement generator toolset selection (cmake -T) for VS >= 10 by setting
the PlatformToolset.  Extend the RunCMake.GeneratorToolset test case to
verify CMAKE_GENERATOR_TOOLSET when the generator supports -T.

Since commit 485a940e (VS: Simplify MSVC version reporting, 2012-08-23)
all MSVC version information is detected during the compiler id step
from the actual compiler invoked by generated build systems rather than
hard-coded in VS generators.  Therefore we can set the PlatformToolset
in VS >= 10 project files and support toolsets from other VS versions.

1 files changed, 8 insertions, 0 deletions

diff --git a/Source/cmGlobalVisualStudio10Generator.cxx b/Source/cmGlobalVisualStudio10Generator.cxx
index d992036..cac72fc 100644
--- a/Source/cmGlobalVisualStudio10Generator.cxx
+++ b/Source/cmGlobalVisualStudio10Generator.cxx
@@ -80,6 +80,14 @@ cmGlobalVisualStudio10Generator::cmGlobalVisualStudio10Generator(
 }
 
 //----------------------------------------------------------------------------
+bool
+cmGlobalVisualStudio10Generator::SetGeneratorToolset(std::string const& ts)
+{
+  this->PlatformToolset = ts;
+  return true;
+}
+
+//----------------------------------------------------------------------------
 void cmGlobalVisualStudio10Generator::AddPlatformDefinitions(cmMakefile* mf)
 {
   cmGlobalVisualStudio8Generator::AddPlatformDefinitions(mf);