On Wed, 21 Nov 2007, Harlan Stenn wrote:
A variety of problems can crop up if one is "doing things" in an
NFS-mounted filesystem and there is clock skew between the local machine
(NFS client box) and the machine that hosts the actual filesystem (NFS
server box).
I suggest that you check out some cool software called xntp which can
help correct your clock skew problems.
If I am running a configure script and there is a clock skew problem, I
would want to know this ASAP beacuse if the clock skew is not
deliberate, I want to fix it Right Away.
Which particular clock skew do you want to detect?
* Clock skew to source directory
* Clock skew to build directory
* Clock skew to header files outside the source directory
* Clock skew to libraries outside the build directory
* Clock skew to temporary file directory (gasp!)
* Clock skew due to filesystem with 1 second time resolution
* Clock skew during build due to wandering clock
* Clock skew to parallel build machine
All of these problems are possible. Some issues are seen by GNU make
and others are not. When my clocks are a bit off I have noticed that
GNU make sometimes intermittently complains due to the "wandering
clock" problem. If I am not imagining things, I have seen configure
complain about clock problems before so perhaps there is already a
sanity check in place.
Bob
======================================
Bob Friesenhahn
bfriesen@xxxxxxxxxxxxxxxxxxx, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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