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Re: When did K&R function declarations become obsolete?

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On Wednesday, December 14, 2011 6:54:25 PM UTC+8, Keith Thompson wrote:
> Jonathan Leffler <jlef...@earthlink.net> writes:
> > On 12/10/11 10:23 AM, Alan Mackenzie wrote:
> >> I think we can say that K&R function declarations are truly obsolete.  In
> >> ~20 years of hacking C, I've only seen very old code which uses them.
> >>
> >> Presumably these declarations are still widely used in compiler validation
> >> suites but nowhere else.
> >>
> >> Approximately when did they become obsolete, i.e. not used at all for new
> >> code?
> >
> > They are still used in the GCC source code, probably to ensure that
> > GCC can be compiled by a compiler that does not recognize prototypes.
> > (It used to be the case the HP-UX comes with such a compiler, used for
> > rebuilding the kernel.)
> 
> As of gcc 3.4:
> 
>      * GCC now requires an ISO C90 (ANSI C89) C compiler to build. K&R C
>        compilers will not work.
> 
> (quoted from the gcc 4.6.0 NEWS file).  gcc 3.4.0 was released April,
> 2004; the last 3.4 release, 3.4.6, was March, 2006.  But that doesn't
> necessarily mean there aren't still non-prototype declarations.
> 
> [...]
> 
> > I still encounter them routinely, and curse the fact that no-one else
> > has bothered to convert them.  (There are more or less complete sets
> > of headers with prototypes for the functions - so there is normally a
> > prototype in scope when the function definition is compiled or the
> > called, but not always.)  And one or two benighted individuals have
> > produced new K&R functions for consistency with the rest of the
> > file. When I find out in time, I have a firm discussion with the
> > individual, who usually repents of their aberrant ways.  But too often
> > I don't find out about it until some time later.
> 
> Maintaining existing coding style is *usually* a very good idea.
> Prototypes are an unusual case where one style is clearly better than
> another one.
> 
> -- 
> Keith Thompson (The_Other_Keith) ks...@mib.org  <http://www.ghoti.net/~kst>
>     Will write code for food.
> "We must do something.  This is something.  Therefore, we must do this."
>     -- Antony Jay and Jonathan Lynn, "Yes Minister"

Unless there won't be new instruction sets of CPU designed to emerge on the world, the old style K&R non-prototyped assembly calling convention won't 
die. 

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When did K&R function declarations become obsolete? Alan Mackenzie <acm@muc.de> - 2011-12-10 18:23 +0000
  Re: When did K&R function declarations become obsolete? Kaz Kylheku <kaz@kylheku.com> - 2011-12-10 18:41 +0000
  Re: When did K&R function declarations become obsolete? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-10 10:40 -0800
    Re: When did K&R function declarations become obsolete? Ian Collins <ian-news@hotmail.com> - 2011-12-11 07:49 +1300
    Re: When did K&R function declarations become obsolete? Ben Pfaff <blp@cs.stanford.edu> - 2011-12-10 10:49 -0800
  Re: When did K&R function declarations become obsolete? jt@toerring.de (Jens Thoms Toerring) - 2011-12-10 21:16 +0000
    Re: When did K&R function declarations become obsolete? Alan Mackenzie <acm@muc.de> - 2011-12-12 11:29 +0000
      Re: When did K&R function declarations become obsolete? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-12 03:49 -0800
      Re: When did K&R function declarations become obsolete? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-12 15:04 +0000
        Re: When did K&R function declarations become obsolete? Alan Mackenzie <acm@muc.de> - 2011-12-13 10:42 +0000
          Re: When did K&R function declarations become obsolete? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-13 13:58 +0000
            Re: When did K&R function declarations become obsolete? "Scott Fluhrer" <sfluhrer@ix.netcom.com> - 2011-12-13 10:17 -0500
              Re: When did K&R function declarations become obsolete? ralph <nt_consulting64@yahoo.net> - 2011-12-13 12:04 -0600
                Re: When did K&R function declarations become obsolete? Kaz Kylheku <kaz@kylheku.com> - 2011-12-13 18:17 +0000
                Re: When did K&R function declarations become obsolete? ralph <nt_consulting64@yahoo.net> - 2011-12-13 15:17 -0600
                Re: When did K&R function declarations become obsolete? Kaz Kylheku <kaz@kylheku.com> - 2011-12-13 21:46 +0000
                Re: When did K&R function declarations become obsolete? Seebs <usenet-nospam@seebs.net> - 2011-12-13 22:04 +0000
                Re: When did K&R function declarations become obsolete? jgk@panix.com (Joe keane) - 2011-12-13 23:07 +0000
                Re: When did K&R function declarations become obsolete? Seebs <usenet-nospam@seebs.net> - 2011-12-13 23:23 +0000
                Re: When did K&R function declarations become obsolete? Kaz Kylheku <kaz@kylheku.com> - 2011-12-14 00:26 +0000
                Re: When did K&R function declarations become obsolete? blp@cs.stanford.edu (Ben Pfaff) - 2011-12-13 15:22 -0800
                Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-13 15:27 -0800
                Re: When did K&R function declarations become obsolete? Alan Mackenzie <acm@muc.de> - 2011-12-14 09:33 +0000
              Re: When did K&R function declarations become obsolete? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-13 19:49 +0000
                Re: When did K&R function declarations become obsolete? "Scott Fluhrer" <sfluhrer@ix.netcom.com> - 2011-12-13 14:54 -0500
    Re: When did K&R function declarations become obsolete? luser- -droog <mijoryx@yahoo.com> - 2011-12-20 02:28 -0800
  Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-10 13:48 -0800
    Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-10 21:48 -0800
  Re: When did K&R function declarations become obsolete? Ralph Spitzner <rasp@spitzner.org> - 2011-12-11 04:16 +0100
    Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-10 21:54 -0800
  Re: When did K&R function declarations become obsolete? ralph <nt_consulting64@yahoo.net> - 2011-12-10 22:27 -0600
    Re: When did K&R function declarations become obsolete? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-11 12:56 +0000
      Re: When did K&R function declarations become obsolete? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-11 09:11 -0500
        Re: When did K&R function declarations become obsolete? ralph <nt_consulting64@yahoo.net> - 2011-12-11 21:40 -0600
          Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-12 00:05 -0800
            Re: When did K&R function declarations become obsolete? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-12 15:00 +0000
              Re: When did K&R function declarations become obsolete? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-12 07:18 -0800
                Re: When did K&R function declarations become obsolete? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-12-13 00:55 -0800
                Re: When did K&R function declarations become obsolete? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-13 07:50 -0800
              Re: When did K&R function declarations become obsolete? ralph <nt_consulting64@yahoo.net> - 2011-12-12 11:15 -0600
            Re: When did K&R function declarations become obsolete? ralph <nt_consulting64@yahoo.net> - 2011-12-12 11:17 -0600
              Re: When did K&R function declarations become obsolete? jgk@panix.com (Joe keane) - 2011-12-12 21:57 +0000
                Re: When did K&R function declarations become obsolete? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-12 18:15 -0500
      Re: When did K&R function declarations become obsolete? ralph <nt_consulting64@yahoo.net> - 2011-12-11 15:10 -0600
  Re: When did K&R function declarations become obsolete? James Kuyper <jameskuyper@verizon.net> - 2011-12-11 09:17 -0500
    Re: When did K&R function declarations become obsolete? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-11 06:53 -0800
      Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-12 00:08 -0800
    Re: When did K&R function declarations become obsolete? Alan Mackenzie <acm@muc.de> - 2011-12-12 11:59 +0000
      Re: When did K&R function declarations become obsolete? James Kuyper <jameskuyper@verizon.net> - 2011-12-12 07:47 -0500
        Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-12 11:59 -0800
          Re: When did K&R function declarations become obsolete? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-12 18:17 -0500
            Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-12 15:43 -0800
      Re: When did K&R function declarations become obsolete? André Gillibert <MetaEntropy.removeThis@gmail.com> - 2011-12-12 13:49 +0100
        Re: When did K&R function declarations become obsolete? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-12 05:25 -0800
          Re: When did K&R function declarations become obsolete? André Gillibert <MetaEntropy.removeThis@gmail.com> - 2011-12-12 14:35 +0100
      Re: When did K&R function declarations become obsolete? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-12 15:21 +0000
  Re: When did K&R function declarations become obsolete? Jonathan Leffler <jleffler@earthlink.net> - 2011-12-13 22:19 -0800
    Re: When did K&R function declarations become obsolete? Keith Thompson <kst-u@mib.org> - 2011-12-14 02:54 -0800
      Re: When did K&R function declarations become obsolete? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-14 13:17 -0800

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