Re: Fedora 31 System-Wide Change proposal: Switch RPMs to zstd compression

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Sent from my iPhone

> On Aug 29, 2019, at 12:58 PM, Kamil Dudka <kdudka@xxxxxxxxxx> wrote:
> 
>> On Tuesday, June 4, 2019 9:43:53 AM CEST Panu Matilainen wrote:
>>> On 6/4/19 9:56 AM, Daniel Mach wrote:
>>> 
>>> Dne 31. 05. 19 v 2:15 Pavel Raiskup napsal(a):
>>> 
>>>>> On Thursday, May 30, 2019 10:38:25 AM CEST Miroslav Suchý wrote:
>>>>> 
>>>>> Dne 29. 05. 19 v 23:52 Josh Boyer napsal(a):
>>>>> 
>>>>>> If we did this, wouldn't it make it very difficult to use tools like
>>>>>> mock on RHEL / CentOS 7 to build for Fedora 3x?
>>>>> 
>>>>> 
>>>>> 
>>>>> Speaking of Mock:
>>>>> Either the RPM on host need to understand the new format/compression 
>>>>> **or**
>>>>> the packages in @buildsys group (including transitional deps) have to 
>>>>> be in
>>>>> old format - then you can build for Fedora 3x using bootstrap feature.
>>>> 
>>>> 
>>>> 
>>>> I need to underline this, it would be really really really bad if we
>>>> were
>>>> not able to --installroot fedora chroots at least on RHEL 8.  How likely
>>>> is a backport of zstd support into RPM in EL7+?
>>> 
>>> RHEL 8 should be quite easy - get zstd package into RHEL and recompile 
>>> rpm with zstd support.
>>> 
>>> RHEL 7 is a different story. The patch doesn't apply directly and a 
>>> backport would be needed.
>>> 
>>> Panu,
>>> how difficult it would be to backport the zstd support to RHEL 7 RPM?
>> 
>> 
>> Technically, backporting rpmio backends is almost trivial, even to much 
>> older rpm versions.
>> 
>> Getting new features into older RHEL is a much bigger problem.
>> 
>>    - Panu -
> 
> Has there been any progress on this?
> 
> What is the recommended way to build Fedora 31+ RPMs on a RHEL-7 

With “mock”, available from EPEL.
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