libreadline rl_message() and building the same object file 6 times?

[dt71 at gmx.com]

Sean Bruno wrote, On 10/30/2013 23:14:
> On Wed, 2013-10-30 at 22:24 +0200, Konstantin Belousov wrote:
>>> Thank you for the explanation.  Is there a trivial way to abort
>> building
>>> all the objects or fail if one fails?  Or is this done in parallel?
>>
>> This is done automatically, no ?
>> Bmake seems to be more advanced in this regard, e.g. my parallel
>> kernel builds with compilation error in some module abort whole build
>> immediately, comparing with fmake builds which run to the end.
>
> Yes, the build exits immediately if I understand what's going on
> correctly.  My question was about building all six objects, shouldn't
> one error/warning be enough?  Or is there no way for what I propose to
> happen?

What if one path takes very long, for example, if it's an independent call to make(1)?