[OE-core] connman dependency of readline

[claus.stovgaard at gmail.com]

> > it is set to always depend on readline in the DEPENDS variable,
> > even
> > though as far as I know it is only the connmanctl which depend on
> > readline.
> > In EXTRA_OECONF the --enable-client is hardcoded.
> > 
> > The client is though not included in the image unless you also add
> > connman-client.
> > 
> > So I am thinking on creating a patch where I create a
> > PACKAGECONFIG[readline] like bluez5, as I would not need the client
> > and
> > will need not to include readline because of GPLv3.
> 
> If readline is only needed to build the connman client and it is 
> packaged in a separate package, then you are only affected by 
> readline's GPL-3.0 license if you install that package. If you do 
> not install it you are ok even if readline is needed during the 
> build. So there should not be any real need to disable the building 
> of the client.

Thanks for your reply. Was also mixing DEPENDS up with RDEPENDS inside
my head.

Before your mail I had created a small patch and sent. I was
considering just to request it beeing dropped, but on the otherhand it
make it possible to use 

INCOMPATIBLE_LICENSE = "GPL-3.0"

without getting below error. 

ERROR: Nothing PROVIDES 'readline' (but /openembedded/oe-
core/meta/recipes-connectivity/connman/connman_1.37.bb DEPENDS on or
otherwise requires it)
readline was skipped: it has an incompatible license: GPLv3+

Though fine with me if the patch is dropped.

As a side note, is there a way for specifing INCOMPATIBLE_LICENSE on an
image level, and not as here on the build level? If this is the case,
there is no need for my change at all.

Regards
Claus