From: Geoff Levand <geoff@infradead.org>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH v2 6/6] package/go: Set file timestamp
Date: Tue, 24 May 2016 14:35:40 -0700 [thread overview]
Message-ID: <1464125740.5014.53.camel@infradead.org> (raw)
In-Reply-To: <20160524211354.20788c35@free-electrons.com>
Hi,
On Tue, 2016-05-24 at 21:13 +0200, Thomas Petazzoni wrote:
> On Thu, 19 May 2016 22:25:02 +0000, Geoff Levand wrote:
> > Set all file timestamps to prevent the go compiler from rebuilding any
> > built in packages when programs are built.
>
> That's weird, why is it needed?
If the times are not set, when a go program is built go may
rebuild some of the installed packages. This is the same
kind of time based dependecy checking make does.
Without this change I can observe installed packages being
rebuilt when flannel is built on my machine.
> Why are timestamps wrong in the first
> place?
I guess go is built in parallel, and so the artifacts have
different times. Gentoo does a similar timestamp operation
in the pkg_postinst of its ebuild:
https://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/dev-lang/go/go-9999.ebuild?logsort=cvs&revision=1.30&view=markup
-Geoff
next prev parent reply other threads:[~2016-05-24 21:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-19 22:25 [Buildroot] [PATCH v2 0/6] Fixes for go language support Geoff Levand
2016-05-19 22:25 ` [Buildroot] [PATCH v2 2/6] package/go: Add HOST_GO_TARGET_ENV Geoff Levand
2016-05-19 22:25 ` [Buildroot] [PATCH v2 5/6] package/flannel: Add BR2_TOOLCHAIN_HAS_THREADS Geoff Levand
2016-05-19 22:25 ` [Buildroot] [PATCH v2 3/6] package/flannel: Use HOST_GO_TARGET_ENV Geoff Levand
2016-05-19 22:25 ` [Buildroot] [PATCH v2 6/6] package/go: Set file timestamp Geoff Levand
2016-05-24 19:13 ` Thomas Petazzoni
2016-05-24 20:12 ` Christian Stewart
2016-05-24 21:35 ` Geoff Levand [this message]
2016-05-19 22:25 ` [Buildroot] [PATCH v2 4/6] package/go: Add HOST_GO_CGO_ENABLED Geoff Levand
2016-05-19 22:25 ` [Buildroot] [PATCH v2 1/6] package/go: Build host tools with host CC Geoff Levand
2016-05-24 19:11 ` Thomas Petazzoni
2016-05-24 21:31 ` Geoff Levand
2016-05-24 21:34 ` [Buildroot] [PATCH v2.1 " Geoff Levand
2016-05-25 14:05 ` Thomas Petazzoni
2016-05-25 16:41 ` Geoff Levand
2016-05-25 20:59 ` Thomas Petazzoni
2016-05-26 17:24 ` Geoff Levand
2016-05-26 17:30 ` Thomas Petazzoni
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