Reworking the MSVC-related build options

[Norbert Thiebaud]

On Wed, Dec 5, 2012 at 12:25 AM, Tor Lillqvist <tml at iki.fi> wrote:
> Anyway, about killing the --directx-home option, even if that is done,
> that does not mean having and building against the DirectX SDK (June
> 2010, or some earlier version) would be mandatory. It would just mean
> that if the standard DXSDK_DIR environment variable does not exist,
> then DirectX use is not built, i.e. like --disable-directx.
>
> Probably the explicit --disable/enable-directx option can be removed
> too; if $DXSDK_DIR exists and is valid, build against it, otherwise
> not (and give a warning that the resulting build lacks functionality
> and should probably not be distributed in a serious way). Why would
> this need to be a configure option?

to be able to reproduce a scenario: build using the same config than
the one that broke ?

Norbert