[PATCH] user: Add migration hints from old build system

[Joel Sherrill]

Why the __ around RTEMS_ADA and no other option?

I think the first order of business is to explain how to translate existing
configure and build steps to the new one. I think adding a simple example
with a couple of enable/disable and the corresponding waf would help. Every
user has to face this.

Then explaining multiple bsps but I don't know how common that is in actual
use.

Let's focus on getting folks across the transition hurdle first.

On Sat, Sep 26, 2020, 6:37 AM Chris Johns <chrisj at rtems.org> wrote:

>
> > On 26 Sep 2020, at 1:17 am, Sebastian Huber <
> sebastian.huber at embedded-brains.de> wrote:
> >
> > On 25/09/2020 17:12, Gedare Bloom wrote:
> >
> >>> +Migration from Autoconf/Automake
> >>> +================================
> >>> +
> >>> +The Autoconf/Automake based build system used a ``configure`` command
> to
> >>> +configure a single BSP and ``make`` to build it.  The ``configure``
> command is
> >> You can make multiple BSPs, so it is a little bit imprecise. Maybe:
> >> "configure a single target architecture and one or more BSPs" and
> ``make`` ...
> >>
> > Ok, but I am not sure if it was an intentional feature that you could
> build more than one BSP.
>
> It was. As Gedare says it was only one architecture due to the single
> —target option. I think no BSP option built the lot which was painful due
> to the time it took and the disk space.
>
> Chris
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