Configuration: add unsupported masm target.

# We can't make commitment to supporting Microsoft assembler,

# because it would mean supporting all masm versions. This in

# in turn is because masm is not really an interchangeable option,

# while users tend to have reasons to stick with specific Visual

# Studio versions. It's usually lesser hassle to make it work

# with latest assembler, but tweaking for older versions had

# proven to be daunting task. This is experimental target, for

# production builds stick with [up-to-date version of] nasm.

%targets = (

    "VC-WIN64A-masm" => {

        inherit_from    => [ "VC-WIN64A" ],

        as              => "ml64",

        asflags         => "/c /Cp /Cx /Zi",

        asoutflags      => "/Fo",

    },

);