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Re: tar-pax or tar-ustar as a default for automake

From: Bob Friesenhahn
Subject: Re: tar-pax or tar-ustar as a default for automake
Date: Thu, 23 Jun 2011 08:59:32 -0500 (CDT)
User-agent: Alpine 2.01 (GSO 1266 2009-07-14)

On Thu, 23 Jun 2011, Andrew W. Nosenko wrote:

Hmmm...  What about do not enforce any particular format by default?
Especially if consider that on my FreeBSD automake already enforses
ustar when tries to enforce v7 ;-)

   tardir=testprog-0.0.0 && /usr/local/bin/bash
/home/user/tmp/testprog/missing --run tar chof - "$tardir" | bzip2 -9
-c >testprog-0.0.0.tar.bz2

The 'o' option in the 'tar chof -' above means '-‐format ustar' for
bsdtar instead of '--format v7' for GNU tar :-)

That is very interesting. On my Solaris system, I see that the 'gtar' program was selected. With this 'gtar' the -o option is equivalent to:

      --old-archive, --portability
                             same as --format=v7

but I see that with bsdtar -o requests a different format:

     -o      (c, r, u mode) A synonym for --format ustar

Bob Friesenhahn
GraphicsMagick Maintainer,

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