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doc: Clarify that tar timestamp warnings affect tar <= 1.26. 

* doc/guix.texi (Binary Installation): Explain that warnings were triggered by
  tar <= 1.26.
master
Ludovic Courtès 2015-07-24 01:07:34 +02:00
parent 7e96eb1a08
commit e9ba6357e3
1 changed files with 4 additions and 2 deletions
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@ -313,8 +313,10 @@ Do @emph{not} unpack the tarball on a working Guix system since that
would overwrite its own essential files.
The @code{--warning=no-timestamp} option makes sure GNU@tie{}tar does
not emit warnings about ``implausibly old time stamps''. These
warnings, sometimes enabled by default, stem from the fact that all the
not emit warnings about ``implausibly old time stamps'' (such
warnings were triggered by GNU@tie{}tar 1.26 and older; recent
versions are fine.)
They stem from the fact that all the
files in the archive have their modification time set to zero (which
means January 1st, 1970.) This is done on purpose to make sure the
archive content is independent of its creation time, thus making it