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

[Chris Johns]

> 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