Re: [Xen-devel] [PATCH v2 1/8] xen: calculate XEN_BUILD_TIME using XEN_BUILD_DATE value

[Roger Pau Monné <royger@xxxxxxxxxxx>]

On Wed, Jul 04, 2018 at 04:41:30PM +0100, Ian Jackson wrote:
> Daniel Kiper writes ("Re: [PATCH v2 1/8] xen: calculate XEN_BUILD_TIME using 
> XEN_BUILD_DATE value"):
> > On Wed, Jul 04, 2018 at 02:58:17PM +0100, Ian Jackson wrote:
> > > export XEN_BUILD_POSIX_TIME       ?= $(shell echo 
> > > $${SOURCE_DATE_EPOCH-date +%s})
> > 
> > OK, but what if SOURCE_DATE_EPOCH is not defined?
> > "date" command is not a good solution here.
> 
> I don't understand why you think not.  I think all the versions of
> date we care about will do something sensible with
>     date +%s
> 
> I don't have a FreeBSD host to hand to test, CC'ing Roger.

date +%s does indeed work fine on FreeBSD:

$ date +%s
1530719654

Roger.

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