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[bug-diffutils] Re: address@hidden: -program-prefix=g gsdiff calls diff

From: Jim Meyering
Subject: [bug-diffutils] Re: address@hidden: -program-prefix=g gsdiff calls diff instead of gdiff]
Date: Thu, 09 Sep 2010 13:21:44 +0200

Karl Berry wrote:
> Sent back when diffutils was essentially unmaintained ... don't know if
> it's still present in 3.0, sorry.
> Date: Sun, 22 Feb 2009 10:55:00 +0000
> From: Jay <address@hidden>
> To: <address@hidden>
> Subject: -program-prefix=g gsdiff calls diff instead of gdiff
> When I build diffutils 2.8.1 with -program-prefix=g
> so that I get gdiff that doesn't hide vendor diff,
> the resulting gsdiff doesn't know to call gdiff instead of diff.
> This is on HP-UX 11iv1 (11.11) but that's probably not relevant.

Hi Karl,

Thanks for forwarding that.
I've just verified that the latest (diffutils-3.0) works fine.
This example shows that Xsdiff (I used X, not 'g') does indeed invoke Xdiff:

$ echo a > a; echo b > b
$ (export PATH=$PWD:/usr/bin; strace -ff -ok ./Xsdiff a b)
a                                                             | b
[Exit 1]
$ grep Xdif k.4252
execve("/t/junk/bin/Xdiff", ["Xdiff", "-y", "--", "a", "b"], [/* 86 vars */]) = 0

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