[OE-core] [PATCH] openssh: resolve install conflict with openssh-sftp-server-dev

[Urs Fässler]

On Wed, 2018-09-19 at 09:01 -0700, Richard Purdie wrote:
> On Wed, 2018-09-19 at 17:11 +0200, Andreas Oberritter wrote:
> > On Wed, 19 Sep 2018 08:41:35 +0200
> > Urs Fässler <urs.fassler at bbv.ch> wrote:
> > 
> > > Image generation fails with the configuration:
> > >   EXTRA_IMAGE_FEATURES = "ssh-server-dropbear eclipse-debug dev-
> > > pkgs"
> > > This is due the dependency eclipse-debug -> openssh-sftp-server ->
> > > openssh-dev -> openssh. openssh can not be installed since it
> > > conflicts
> > > with dropbear.
> > 
> > That's odd. Why does openssh-sftp-server depend on openssh-dev?
> > Does
> > openssh-dev contain a file which it shouldn't, e.g. a dynamically
> > loaded module/plug-in?
> 
> It doesn't, its the fact that "dev-pkgs" are requested in
> IMAGE_FEATURES. "openssh-dev" would be the default for openssh
> packages
> and dropbear-dev would be the default for dropbear packages. 
> 
> The patch here doesn't sound correct. I'm wondering if the correct
> fix
> is for ${PN}-dev should not depend on ${PN} and whether that
> would fix
> the problem?

The dependency from ${PN}-dev to ${PN} seems to be the default behavior
in Yocto. I don't know the consequences when we change this for
openssh. But it helps in my case.
(I added RDEPENDS_${PN}-dev = "", didn't found a better way)

Another workaround is, when I don't allow the generation of an empty
${PN}-dev package. I have the same considerations as with the previous
idea.

I see the problem that dev-pkgs automatically installs openssh-dev if I
select the openssh-sftp-server.
The nice solution would be to tell Yocto not to install openssh-dev
when openssh-sftp-server and dev-pkgs is configured. But I have no idea
if or how this is possible.

Unfortunately I didn't found a recipe where this problem is also
solved.

Kind Regards
Urs