Enable 64-bit tools with VS 2010 Express (#9981, #10722)

The Express Edition does not come with 64-bit tools, but one can install
the "Microsoft Windows SDK v7.1" to get them.  Detect this case and
check for the SDK.  If found, set PlatformToolset to use the SDK tools.
Otherwise, fail with a concise and informative error.

1 files changed, 49 insertions, 0 deletions

diff --git a/Source/cmGlobalVisualStudio10Win64Generator.cxx b/Source/cmGlobalVisualStudio10Win64Generator.cxx
index 109b60d..8600777 100644
--- a/Source/cmGlobalVisualStudio10Win64Generator.cxx
+++ b/Source/cmGlobalVisualStudio10Win64Generator.cxx
@@ -36,3 +36,52 @@ void cmGlobalVisualStudio10Win64Generator
   mf->AddDefinition("MSVC_C_ARCHITECTURE_ID", "x64");
   mf->AddDefinition("MSVC_CXX_ARCHITECTURE_ID", "x64");
 }
+
+//----------------------------------------------------------------------------
+bool cmGlobalVisualStudio10Win64Generator::Find64BitTools(cmMakefile* mf)
+{
+  if(!this->PlatformToolset.empty())
+    {
+    return true;
+    }
+  // This edition does not come with 64-bit tools.  Look for them.
+  //
+  // TODO: Detect available tools?  x64\v100 exists but does not work?
+  // KHLM\\SOFTWARE\\Microsoft\\MSBuild\\ToolsVersions\\4.0;VCTargetsPath
+  // c:/Program Files (x86)/MSBuild/Microsoft.Cpp/v4.0/Platforms/
+  //   {Itanium,Win32,x64}/PlatformToolsets/{v100,v90,Windows7.1SDK}
+  std::string winSDK_7_1;
+  if(cmSystemTools::ReadRegistryValue(
+       "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Microsoft SDKs\\"
+       "Windows\\v7.1;InstallationFolder", winSDK_7_1))
+    {
+    cmOStringStream m;
+    m << "Found Windows SDK v7.1: " << winSDK_7_1;
+    mf->DisplayStatus(m.str().c_str(), -1);
+    this->PlatformToolset = "Windows7.1SDK";
+    return true;
+    }
+  else
+    {
+    cmOStringStream e;
+    e << "Cannot enable 64-bit tools with Visual Studio 2010 Express.\n"
+      << "Install the Microsoft Windows SDK v7.1 to get 64-bit tools:\n"
+      << "  http://msdn.microsoft.com/en-us/windows/bb980924.aspx";
+    mf->IssueMessage(cmake::FATAL_ERROR, e.str().c_str());
+    cmSystemTools::SetFatalErrorOccured();
+    return false;
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmGlobalVisualStudio10Win64Generator
+::EnableLanguage(std::vector<std::string> const& languages,
+                 cmMakefile* mf, bool optional)
+{
+  if(this->IsExpressEdition() && !this->Find64BitTools(mf))
+    {
+    return;
+    }
+  this->cmGlobalVisualStudio10Generator
+    ::EnableLanguage(languages, mf, optional);
+}