Added systemversion API. Fixes #315

src/_premake_init.lua

@@ -966,6 +966,12 @@
 		},
 	}
 
+	api.register {
+		name = "systemversion",
+		scope = "project",
+		kind = "string",
+	}
+
 	api.register {
 		name = "targetdir",
 		scope = "config",

src/actions/vstudio/vs2010_vcxproj.lua

@@ -127,6 +127,7 @@
 			m.ignoreWarnDuplicateFilename,
 			m.keyword,
 			m.projectName,
+			m.targetPlatformVersion,
 		}
 	end
 
@@ -1924,6 +1925,14 @@
 	end
 
 
+	function m.targetPlatformVersion(prj)
+		local min = project.systemversion(prj)
+		if min ~= nil and _ACTION >= "vs2015" then
+			m.element("WindowsTargetPlatformVersion", nil, min)
+		end
+	end
+
+
 	function m.treatLinkerWarningAsErrors(cfg)
 		if cfg.flags.FatalLinkWarnings then
 			local el = iif(cfg.kind == p.STATICLIB, "Lib", "Linker")

src/base/project.lua

@@ -506,3 +506,14 @@
 		return pairing
 	end
 
+
+--
+-- Given a project, returns requested min and max system versions.
+--
+
+	function project.systemversion(prj)
+		if prj.systemversion ~= nil then
+			local values = string.explode(prj.systemversion, ":", true)
+			return values[1], values[2]
+		end
+	end

tests/actions/vstudio/vc2010/test_globals.lua

@@ -191,3 +191,64 @@
 </PropertyGroup>
 		]]
 	end
+
+
+--
+-- VS 2015 adds the <WindowsTargetPlatformVersion> to allow developers
+-- to target different versions of the Windows SDK.
+--
+
+	function suite.windowsTargetPlatformVersionMissing_on2013Default()
+		_ACTION = "vs2013"
+		prepare()
+		test.capture [[
+<PropertyGroup Label="Globals">
+	<ProjectGuid>{42B5DBC6-AE1F-903D-F75D-41E363076E92}</ProjectGuid>
+	<IgnoreWarnCompileDuplicatedFilename>true</IgnoreWarnCompileDuplicatedFilename>
+	<Keyword>Win32Proj</Keyword>
+	<RootNamespace>MyProject</RootNamespace>
+</PropertyGroup>
+		]]
+	end
+
+	function suite.windowsTargetPlatformVersionMissing_on2013()
+		_ACTION = "vs2013"
+		systemversion "10.0.10240.0"
+		prepare()
+		test.capture [[
+<PropertyGroup Label="Globals">
+	<ProjectGuid>{42B5DBC6-AE1F-903D-F75D-41E363076E92}</ProjectGuid>
+	<IgnoreWarnCompileDuplicatedFilename>true</IgnoreWarnCompileDuplicatedFilename>
+	<Keyword>Win32Proj</Keyword>
+	<RootNamespace>MyProject</RootNamespace>
+</PropertyGroup>
+		]]
+	end
+
+	function suite.windowsTargetPlatformVersionMissing_on2015Default()
+		_ACTION = "vs2015"
+		prepare()
+		test.capture [[
+<PropertyGroup Label="Globals">
+	<ProjectGuid>{42B5DBC6-AE1F-903D-F75D-41E363076E92}</ProjectGuid>
+	<IgnoreWarnCompileDuplicatedFilename>true</IgnoreWarnCompileDuplicatedFilename>
+	<Keyword>Win32Proj</Keyword>
+	<RootNamespace>MyProject</RootNamespace>
+</PropertyGroup>
+		]]
+	end
+
+	function suite.windowsTargetPlatformVersion_on2015()
+		_ACTION = "vs2015"
+		systemversion "10.0.10240.0"
+		prepare()
+		test.capture [[
+<PropertyGroup Label="Globals">
+	<ProjectGuid>{42B5DBC6-AE1F-903D-F75D-41E363076E92}</ProjectGuid>
+	<IgnoreWarnCompileDuplicatedFilename>true</IgnoreWarnCompileDuplicatedFilename>
+	<Keyword>Win32Proj</Keyword>
+	<RootNamespace>MyProject</RootNamespace>
+	<WindowsTargetPlatformVersion>10.0.10240.0</WindowsTargetPlatformVersion>
+</PropertyGroup>
+		]]
+	end