[yocto] Package specific version dependencies

[Francesco Del Degan]

Mark Hatle <mark.hatle at windriver.com> writes:

> On 8/6/13 4:07 AM, Paul Eggleton wrote:
>> Hi Francesco,
>>
>> On Tuesday 06 August 2013 09:55:06 Francesco Del Degan wrote:
>>> Playing with RDEPENDS variable i'm facing the needs to
>>> specify a dependency based on specific version of a package
>>> (greather than, in my specific case).
>>>
>>> The underlying package managers supports declaring dependencies
>>> including version relationships, for example:
>>>
>>> Rpm:  Requires: package_xxx >= 1.0.27
>>> Deb:  Depends: libc6 (>= 2.2.1)
>>> Okpg: Depends: xfree (>= 6.0), glib2
>>>
>>> Is this feature just missing in yocto or it's explicitly denied
>>> for some reason?
>>
>> This should work, in fact we use it (with =) in conjunction with EXTENDPKGV
>> when we want to force packages from the same recipe to upgrade in lock-step.
>
> The format for RDEPENDS is slightly different from all three.
>
> dep (= ver)
> dep (< ver)
> dep (> ver)
> dep (<= ver)
> dep (>= ver)
>
> (For those familiar with deb style, >> and << is not supported by the
> oe-core dependency set.  This is to avoid confusion as > and < are a
> lot more obvious.)
>
> The items above are then mapped into their respective format depending
> on the package manager you have selected.
>
> Note:  The version dependency items are not evaluated by bitbake, it
> only pays attention to the package name when determining build
> dependencies.  You would also need to specify (in your distribution or
> local .conf file) a PREFERRED_VERSION_dep = "ver" to ensure the right
> version is built.

Got it! Thank you for explanation.

Francesco