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From: | Peter Breitenlohner |
Subject: | Re: sub-second time stamp issues |
Date: | Mon, 11 Jan 2010 11:09:25 +0100 (CET) |
User-agent: | Alpine 2.00 (LNX 1167 2008-08-23) |
On Sun, 10 Jan 2010, Ralf Wildenhues wrote:
As I knew already from trying to understand a similar problem, 'cp -p' and 'touch -r' both round sub-seconds, whereas tar and rsync truncate them.Ouch. That's even worse. The text at 'Timestamps and Make' in the Autoconf manual needs updating for this. That can hurt user-written makefile rules that use `cp -p' or `touch -r'. sanity.m4 can't help it really, because this can at best cause spurious rebuilds of all kinds of things, and at worst not cause updating of some targets.Proposed patch for the Autoconf manual. OK?
Hi Ralf, looks OK. Do you want to mention/stress that the behaviour depends not only on the OS but also on the filessystem type (local/nfs for everyone, for Linux I know that ext2/ext3/jfs behave differently)? Regards Peter Breitenlohner <address@hidden>
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