Standard Headers

From	BartC <bc@freeuk.com>
Newsgroups	comp.lang.c
Subject	Standard Headers
Date	2017-02-17 16:34 +0000
Organization	A noiseless patient Spider
Message-ID	<o878ij$840$1@dont-email.me> (permalink)

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Some questions:

What are the implications (for a normal PC, not embedded devices) of 
having everything in the standard headers already known to a compiler?

That is, as if every source file was prefixed with #includes for the 
20-odd standard C headers.

(And apart from the obvious differences, for example a module with a 
missing #include compiles OK here, but won't compile elsewhere.)

There was another question but I can't remember what it was. In that 
case, let's go with this: The C Standard summarises what's expected in 
the standard headers, but typical headers contain all sorts of extra 
junk, even the smaller ones (I think some of them want to half-implement 
the library functions in the headers).

For example ctype.h ought to contain 14 function declarations, but 
actual headers have from 60 to 360 lines.

The question: will a ctype.h with only 14 lines actually work? (It 
appears to.)

(I'm planning to create my own set of headers, and want to keep them 
minimal, and without bristling with #ifdefs to avoid defining the same 
thing twice. I also intend to have the same headers work on both Windows 
and Linux as much as possible.)

-- 
Bartc

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Standard Headers BartC <bc@freeuk.com> - 2017-02-17 16:34 +0000
  Re: Standard Headers supercat@casperkitty.com - 2017-02-17 08:50 -0800
    Re: Standard Headers luser droog <luser.droog@gmail.com> - 2017-02-17 09:08 -0800
      Re: Standard Headers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-17 20:31 +0000
  Re: Standard Headers GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-17 18:09 +0100
  Re: Standard Headers "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-02-17 09:18 -0800
  Re: Standard Headers Keith Thompson <kst-u@mib.org> - 2017-02-17 09:26 -0800
    Re: Standard Headers BartC <bc@freeuk.com> - 2017-02-17 17:53 +0000
      Re: Standard Headers me <crisdunbar@gmail.com> - 2017-02-17 10:23 -0800
        Re: Standard Headers BartC <bc@freeuk.com> - 2017-02-17 18:45 +0000
          Re: Standard Headers GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-17 19:54 +0100
            Re: Standard Headers Keith Thompson <kst-u@mib.org> - 2017-02-17 12:27 -0800
  Re: Standard Headers jameskuyper@verizon.net - 2017-02-17 11:38 -0800
  Re: Standard Headers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-17 20:49 +0000
    Re: Standard Headers supercat@casperkitty.com - 2017-02-17 13:29 -0800
    Re: Standard Headers BartC <bc@freeuk.com> - 2017-02-17 22:13 +0000
    Re: Standard Headers Nick Bowler <nbowler@draconx.ca> - 2017-02-17 22:28 +0000
      Re: Standard Headers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-18 02:48 +0000
        Re: Standard Headers supercat@casperkitty.com - 2017-02-18 10:26 -0800
          Re: Standard Headers bart4858@gmail.com - 2017-02-18 11:08 -0800
            Re: Standard Headers supercat@casperkitty.com - 2017-02-18 11:45 -0800
  Re: Standard Headers Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-19 13:45 -0800
    Re: Standard Headers BartC <bc@freeuk.com> - 2017-02-19 22:39 +0000
      Re: Standard Headers supercat@casperkitty.com - 2017-02-19 16:00 -0800

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