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Re: [Xen-devel] [PATCH v2 2/8] xen: introduce XEN_COMPILE_POSIX_TIME
- To: Jan Beulich <JBeulich@xxxxxxxx>, Daniel Kiper <daniel.kiper@xxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 25 Jun 2018 15:00:07 +0100
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Tamas K Lengyel <tamas.k.lengyel@xxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 25 Jun 2018 14:00:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 25/06/18 14:54, Jan Beulich wrote:
>>>> On 19.06.18 at 16:35, <daniel.kiper@xxxxxxxxxx> wrote:
>> We need the POSIX time to properly fill the TimeDateStamp field in the PE
>> header.
>>
>> Additionally, realign the variables assignment in xen/Makefile to increase
>> readability.
>>
>> Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
>> ---
>> v2 - suggestions/fixes:
>> - derive XEN_COMPILE_POSIX_TIME from XEN_BUILD_DATE
>> (suggested by Jan Beulich),
>> - echo 0 if date command does not work
>> (suggested by Konrad Rzeszutek Wilk),
> Why would the date command produce an error, other than for not
> supporting -d? But yes, I'm fine with falling back to zero in that case.
> If anyone runs into it and cares, they can submit a patch making it
> work on their platform.
>
>> --- a/xen/Makefile
>> +++ b/xen/Makefile
>> @@ -6,12 +6,13 @@ export XEN_EXTRAVERSION ?= -rc$(XEN_VENDORVERSION)
>> export XEN_FULLVERSION =
>> $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
>> -include xen-version
>>
>> -export XEN_WHOAMI ?= $(USER)
>> -export XEN_DOMAIN ?= $(shell ([ -x /bin/dnsdomainname ] &&
>> /bin/dnsdomainname) || ([ -x /bin/domainname ] && /bin/domainname || echo
>> [unknown]))
>> -export XEN_BUILD_DATE ?= $(shell LC_ALL=C date)
>> -export XEN_BUILD_TIME ?= $(shell LC_ALL=C date -d '$(XEN_BUILD_DATE)'
>> +%T)
>> -export XEN_BUILD_HOST ?= $(shell hostname)
>> -export XEN_CONFIG_EXPERT ?= n
>> +export XEN_WHOAMI ?= $(USER)
>> +export XEN_DOMAIN ?= $(shell ([ -x /bin/dnsdomainname ] &&
>> /bin/dnsdomainname) || ([ -x /bin/domainname ] && /bin/domainname || echo
>> [unknown]))
>> +export XEN_BUILD_DATE ?= $(shell LC_ALL=C date)
>> +export XEN_BUILD_TIME ?= $(shell LC_ALL=C date -d
>> '$(XEN_BUILD_DATE)' +%T)
>> +export XEN_BUILD_POSIX_TIME ?= $(shell LC_ALL=C date -d '$(XEN_BUILD_DATE)'
>> +%s || echo 0)
>> +export XEN_BUILD_HOST ?= $(shell hostname)
>> +export XEN_CONFIG_EXPERT ?= n
> To be honest I'd prefer if you avoided the re-indentation. Especially the
> XEN_DOMAIN line is already pretty long, so it would seem better to me to
> accept the mis-alignment the new setting will have. I continue to not be
> overly happy anyway with this being put here when it's needed only in a
> single place (and the transformation could presumably be easily done
> there, without the need for any new global environment variable).
Why are we adding yet more Xen specific logic to implement the same as
SOURCE_DATE_EPOCH from the reproducible-builds.org effort?
~Andrew
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