[Buildroot] [PATCH 3/3] package/parted: add a host variant

[Arnout Vandecappelle]

On 06/12/13 18:07, Thomas Petazzoni wrote:
> Dear Yann E. MORIN,
>
> On Fri, 6 Dec 2013 17:56:14 +0100, Yann E. MORIN wrote:
>
>> I think we want the same dependency the target parted has. If the target
>> parted can handle lvm2 volumes, then we may have to generate them in the
>> first place.
>
> Yes, we may. But that seems unlikely. I believe the most common usage
> of LVM on embedded platforms is for NAS/storage type devices, and for
> those systems, the root filesystem image is generally not on the
> LVM/RAID storage I believe, no?

  It's also used for encrypted volumes, no?

>
>> So, what about:
>>
>> # If target-parted can handle lvm volumes, then host-parted
>> # should be, too, so as to be able to generate them.
>> # If target-parted can't handle lvm volumes, there is no reason
>> # for host-aprted to handle them.
>> ifeq ($(BR2_PACKAGE_LVM2),y)
>> PARTED_DEPENDENCIES += lvm2
>> HOST_PARTED_DEPENDENCIES += lvm2
>> PARTED_CONF_OPT += --enable-device-mapper
>> HOST_PARTED_CONF_OPT += --enable-device-mapper
>> else
>> PARTED_CONF_OPT += --disable-device-mapper
>> HOST_PARTED_CONF_OPT += --disable-device-mapper
>> endif
>
> While I do understand the logic behind what you're proposing, I'm not
> really comfortable with having the configuration of tools built for the
> host changed depending on the target configuration. It seems to be
> creating a bad precedent.

  We already have a precedent: libxml2.

  What is so bad about one package's configuration depending on another 
package configuration?


>
>>> In the host variant of parted, lvm2 support is never enabled, as I
>>> believe it's pretty unlikely that lvm2 support will be needed to
>>> generate disk images. This would make PATCH 2/3 of your series
>>> unnecessary, of course.
>>
>> I don't think we should not be able to generate lvm volumes. I can see
>> at least a few cases where it would be needed.
>>
>> Of course, we may just add host-parted without lvm support right now,
>> and add it later when the need really arises.
>
> Yes, that would be my proposal.

  That's of course also fine - only implement it when it's actually used.


  Regards,
  Arnout
-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F