Make DMD emit C++ .h files same as .di files

[Manu]

On Mon, Feb 25, 2019 at 11:29 AM H. S. Teoh via Digitalmars-d
<digitalmars-d at puremagic.com> wrote:
>
> On Mon, Feb 25, 2019 at 11:04:56AM -0800, Manu via Digitalmars-d wrote:
> > On Mon, Feb 25, 2019 at 10:10 AM Andrei Alexandrescu via Digitalmars-d
> > <digitalmars-d at puremagic.com> wrote:
> [...]
> > > Indeed so. There's also the network effect of tooling. Integrating
> > > within the compiler would be like the proverbial "giving someone a
> > > fish", whereas framing it as a tool that can be the first inspiring
> > > many others is akin to "teaching fishing".
> >
> > That sounds nice, but it's bollocks though; give me dtoh, i'm about
> > 95% less likely to use it. It's easy to add a flag to the command line
> > of our hyper-complex build, but reworking custom tooling into it, not
> > so much.
> > I'm not a build engineer, and I have no idea how I'd wire a second
> > pass to each source compile if I wanted to. Tell me how to wire that
> > into VS? How do I wite that into XCode? How do I express that in the
> > scripts that emit those project formats, and also makefiles and ninja?
> > How do I express that the outputs (which are .h files) are correctly
> > expressed as inputs of dependent .cpp compile steps?
> [...]
>
> <off-topic rant>
> This is a perfect example of what has gone completely wrong in the world
> of build systems. Too many assumptions and poor designs over an
> extremely simple and straightforward dependency graph walk algorithm,
> that turn something that ought to be trivial to implement into a
> gargantuan task that requires a dedicated job title like "build
> engineer".  It's completely insane, yet people accept it as a fact of
> life. It boggles the mind.
> </off-topic rant>

I couldn't agree more (that existing solutions make it harder than it
needs to be... not that it's actually easy in the first place), but
this is how it is. I can't change that, and I have work to do.
Is D an ecosystem that I use to get my work done, or is it one that I
use to do some intellectual masturbation on the weekend?
I've been tirelessly trying to make the former my reality for a long
time now... I've failed so far... I don't know what to do to correct
the trajectory.
I figure, if you just try and clear the hurdles; one by one, they will
eventually be cleared. But I've also become tired in the meantime.