On Tue, 11 Feb 2020, Richard Purdie wrote:

> On Tue, 2020-02-11 at 05:32 -0500, rpj...@crashcourse.ca wrote:
> >   second, i think we all agree that it is rarely necessary to use
> > "PROVIDES +=", although i did run across one case in
> > recipes-core/glibc/glibc.inc:
> >
> >   PROVIDES = "virtual/libc"
> >   PROVIDES += "virtual/libintl virtual/libiconv"
> >
> > where, sure, if you break it over more than one line, yes, then you
> > need it.
>
> I think the original intent was that bitbake.conf defines the basic
> PROVIDES/DEPENDS and then the recipes adjust as needed.
>
> As such, PROVIDES and DEPENDS would then always use +=.
>
> Unfortunately over the years this has gotten lost and bitbake.conf
> and base.bbclass had to become more inventive about how they set the
> defaults for the variables.
>
> As such, I think += actually makes sense but I realise that isn't
> the way most recipes work now. We could try and fix that but it does
> seem like a marginal gain when there are bigger issues.

  oh, i wasn't suggesting any sort of massive cleanup; i just wanted
to make sure i was explaining it properly to any potential students to
make sure they appreciated corner cases like this.

rday
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