Re: support for POSIX 1003.1-2001 hosts

Paul Eggert wrote:
> > From: "Christopher Kings-Lynne" <chriskl@familyhealth.com.au>
> > Date: Tue, 12 Mar 2002 10:35:35 +0800
> > Importance: Normal
> >
> > What's wrong with "head -n 1"?
>
> Nothing's wrong with it from a standards-compliance point of view.
>
> But I worry that "head -n 1" may not work on some older (pre-POSIX)
> hosts, as it did not work on Unix Version 7 hosts.  In contrast, "sed
> q" did work on those ancient hosts, so I figure "sed q" should be
> safer.  "sed 1q" should be equally good from a portability viewpoint,
> if you prefer.

I have made the 'sed 1q' change you suggested in configure.in, but not
in the docs because I thought it would be too confusing.  The sort
changes, however, were not embraced, as I suspected.  Certainly when we
hit a platform that doesn't understand sort +/-, we will need to make
that change.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
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Index: configure.in
===================================================================
RCS file: /cvsroot/pgsql/configure.in,v
retrieving revision 1.168
diff -c -r1.168 configure.in
*** configure.in    5 Mar 2002 17:55:21 -0000    1.168
--- configure.in    12 Mar 2002 21:23:15 -0000
***************
*** 297,303 ****

  # Create compiler version string
  if test x"$GCC" = x"yes" ; then
!   cc_string="GCC `${CC} --version | head -1`"
  else
    cc_string=$CC
  fi
--- 297,303 ----

  # Create compiler version string
  if test x"$GCC" = x"yes" ; then
!   cc_string="GCC `${CC} --version | sed q`"
  else
    cc_string=$CC
  fi