[vs20xx] Fix flags { "LinkTimeOptimization" } to add missing xml entity LinkTimeCodeGeneration (premake#2313)

Author: Jarod42

modules/vstudio/vs2010_vcxproj.lua

@@ -675,13 +675,15 @@
 				m.fullProgramDatabaseFile,
 				m.generateDebugInformation,
 				m.optimizeReferences,
+				m.LinkTimeCodeGeneration,
 			}
 		else
 			return {
 				m.subSystem,
 				m.fullProgramDatabaseFile,
 				m.generateDebugInformation,
 				m.optimizeReferences,
+				m.LinkTimeCodeGeneration,
 				m.additionalDependencies,
 				m.additionalLibraryDirectories,
 				m.importLibrary,
@@ -2727,6 +2729,11 @@
 		end
 	end
 
+	function m.LinkTimeCodeGeneration(cfg)
+		if cfg.flags.LinkTimeOptimization then
+			m.element("LinkTimeCodeGeneration", nil, "UseLinkTimeCodeGeneration")
+		end
+	end
 
 	function m.optimization(cfg, condition)
 		local map = { Off="Disabled", On="Full", Debug="Disabled", Full="Full", Size="MinSpace", Speed="MaxSpeed" }

src/base/config.lua

@@ -152,7 +152,8 @@
 	function config.canLinkIncremental(cfg)
 		if cfg.kind == "StaticLib"
 				or config.isOptimizedBuild(cfg)
-				or cfg.flags.NoIncrementalLink then
+				or cfg.flags.NoIncrementalLink
+				or cfg.flags.LinkTimeOptimization then
 			return false
 		end
 		return true