Switch Windows builds to use Ninja instead of JOM - hopefully this will improve performance a bit

helpers/compile-build.py

@@ -31,7 +31,7 @@ makeCommand = "make -j {cpuCount} -l {maximumLoad}"
 # Windows is a bit special though
 if sys.platform == 'win32':
 	# We use NMake on Windows at the moment
-	makeCommand = "jom"
+	makeCommand = "ninja -j {cpuCount} -l {maximumLoad}"
 # FreeBSD also likes to do things slightly different
 if sys.platform == 'freebsd12':
 	makeCommand = "gmake -j {cpuCount} -l {maximumLoad}"

helpers/helperslib/BuildSystem.py

@@ -77,7 +77,7 @@ class CMake(object):
 		# Are we on Windows?
 		if sys.platform == 'win32':
 			# We want a NMake based build, rather than the default MSBuild
-			cmakeCommand.append('-G "NMake Makefiles JOM"')
+			cmakeCommand.append('-G "Ninja"')
 
 		# Are we building for Android?
 		if 'ANDROID_NDK' in buildEnvironment and sys.platform == 'linux':

helpers/install-build.py

@@ -38,7 +38,7 @@ makeCommand = "make -j {cpuCount} -l {maximumLoad} install"
 # Windows is a bit special though
 if sys.platform == 'win32':
 	# We use NMake on Windows at the moment
-	makeCommand = "jom install"
+	makeCommand = "ninja -j {cpuCount} -l {maximumLoad} install"
 # FreeBSD also likes to do things slightly different
 if sys.platform == 'freebsd12':
 	makeCommand = "gmake -j {cpuCount} install"