Introduce new config flag BUILD_MP. Compile MP kernel and hal only when this is set to 1 to save us some time and space.

svn path=/trunk/; revision=38270

reactos/ReactOS-generic.rbuild

@@ -110,7 +110,9 @@
 	</directory>
 	<directory name="ntoskrnl">
 		<xi:include href="ntoskrnl/ntoskrnl.rbuild" />
-		<xi:include href="ntoskrnl/ntkrnlmp.rbuild" />
+		<if property="BUILD_MP" value="1">
+			<xi:include href="ntoskrnl/ntkrnlmp.rbuild" />
+		</if>
 	</directory>
 	<directory name="subsystems">
 		<xi:include href="subsystems/subsystems.rbuild" />

reactos/config.template.rbuild

@@ -85,4 +85,9 @@
 -->
 <property name="_ELF_" value="0" />
 
+<!--
+	Whether to compile the multi processor versions for ntoskrnl and hal.
+-->
+<property name="BUILD_MP" value="0" />
+
 </group>

reactos/hal/hal.rbuild

@@ -10,7 +10,9 @@
 			<xi:include href="halx86/hal_generic_up.rbuild" />
 			<xi:include href="halx86/hal_generic_pc.rbuild" />
 			<xi:include href="halx86/halup.rbuild" />
-			<xi:include href="halx86/halmp.rbuild" />
+			<if property="BUILD_MP" value="1">
+				<xi:include href="halx86/halmp.rbuild" />
+			</if>
 			<xi:include href="halx86/halxbox.rbuild" />
 		</directory>
 	</if>