Converted to an API call.

modules/vstudio/_preload.lua

@@ -169,6 +169,12 @@
 		debugger('VisualStudio' .. value)
 	end)
 
+	p.api.register {
+		name = "scanformoduledependencies",
+		scope = "config",
+		kind = "boolean"
+	}
+
 
 --
 -- Decide when the full module should be loaded.

modules/vstudio/tests/vc2019/test_compile_settings.lua

@@ -84,7 +84,7 @@
 --
 
 	function suite.SupportScanForModuleDependenciesOn()
-		flags { "ScanForModuleDependencies" }
+		scanformoduledependencies "yes"
 		prepare()
 		test.capture [[
 <ClCompile>
@@ -96,12 +96,13 @@
 	end
 
 	function suite.SupportScanForModuleDependenciesOff()
-		flags { "ScanForModuleDependencies" }
+		scanformoduledependencies "no"
 		prepare()
 		test.capture [[
 <ClCompile>
 	<PrecompiledHeader>NotUsing</PrecompiledHeader>
 	<WarningLevel>Level3</WarningLevel>
 	<Optimization>Disabled</Optimization>
+	<ScanSourceForModuleDependencies>false</ScanSourceForModuleDependencies>
 		]]
 	end

modules/vstudio/vs2010_vcxproj.lua

@@ -2876,8 +2876,12 @@
 
 	function m.scanSourceForModuleDependencies(cfg)
 		if _ACTION >= "vs2019" then
-			if cfg.flags.ScanForModuleDependencies then
-				m.element("ScanSourceForModuleDependencies", nil, "true")
+			if cfg.scanformoduledependencies ~= nil then
+				if cfg.scanformoduledependencies then
+					m.element("ScanSourceForModuleDependencies", nil, "true")
+				else
+					m.element("ScanSourceForModuleDependencies", nil, "false")
+				end
 			end
 		end
 	end

src/_premake_init.lua

@@ -520,7 +520,6 @@
 			"OptimizeSpeed",       -- DEPRECATED
 			"RelativeLinks",
 			"ReleaseRuntime",      -- DEPRECATED
-			"ScanForModuleDependencies",
 			"ShadowedVariables",
 			"StaticRuntime",       -- DEPRECATED
 			"Symbols",             -- DEPRECATED

website/docs/flags.md

@@ -31,7 +31,6 @@ flags { "flag_list" }
 | NoRuntimeChecks       | Disable Visual Studio's [default stack frame and uninitialized variable checks][2] on debug builds. |
 | OmitDefaultLibrary    | Omit the specification of a runtime library in object files.        |
 | RelativeLinks         | Forces the linker to use relative paths to libraries instead of absolute paths. |
-| ScanForModuleDependencies | Enables the Visual Studio `Scan Sources for Module Dependencies` feature for C++20 modules. | Valid for vs2019 and newer. |
 | ShadowedVariables     | Warn when a variable, type declaration, or function is shadowed.    |
 | StaticRuntime         | Perform a static link against the standard runtime libraries.       | Deprecated - use staticruntime "On" instead. |
 | UndefinedIdentifiers | Warn if an undefined identifier is evaluated in an #if directive.   |

website/docs/scanformoduledependencies.md

@@ -0,0 +1,26 @@
+Enables the `Scan Sources for Module Dependencies` option for Visual Studio projects.
+
+```lua
+scanformoduledependencies "value"
+```
+If no value is set for a configuration, Visual Studio will default the option to `No`.
+
+### Parameters ###
+
+`value` one of:
+* `on`, `yes`, `true` - Sets the option to `Yes`.
+* `off`, `no`, `false` - Sets the option to `No`.
+
+### Applies To ###
+
+Project configurations.
+
+### Availability ###
+
+Premake 5.0-beta2 or later. Only available for Visual Studio 2019 16.9.x and later.
+
+## Examples ##
+
+```lua
+scanformoduledependencies "true"
+```

website/sidebars.js

@@ -232,6 +232,7 @@ module.exports = {
 						'rules',
 						'runpathdirs',
 						'runtime',
+						'scanformoduledependencies',
 						'shaderassembler',
 						'shaderassembleroutput',
 						'shaderdefines',