| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Time to change pg_regress diffs to unified by default? |
| Date: | 2017-04-07 02:54:17 |
| Message-ID: | 28413.1491533657@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> writes:
> I think one problem is that diff -u is not as portable as diff -c. For
> example, the HP-UX 11 man page of diff doesn't list it.
FWIW, I can confirm that HPUX 10.20's diff hasn't got it. That would
not affect gaur/pademelon, if we make this change, because I installed
GNU diffutils on that machine a decade or two ago. It might be a bigger
issue for the other HPUX critters though.
Some other data points:
* POSIX 2008 requires diff -u.
* SUS v2 (POSIX 1997) does not.
* My other pet dinosaur, prairiedog (macOS 10.4 something), has it.
regards, tom lane
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