c:\dev\tmp\jom-comments>nmake

Microsoft (R) Program Maintenance Utility Version 14.00.24210.0
Copyright (C) Microsoft Corporation.  All rights reserved.

        echo var1:narf me\\.
var1:narf me\\.
        echo var2:blame this var3 = hail that.
var2:blame this var3 = hail that.
        echo var3:.
var3:.

c:\dev\tmp\jom-comments>jom

jom 1.1.2 - empower your cores

        echo var1:narf me\var2 = blame thisvar3 = hail that.
var1:narf me\var2 = blame thisvar3 = hail that.
        echo var2:.
var2:.
        echo var3:.
var3:.