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Re: Why I use gcc

From BartC <bc@freeuk.com>
Newsgroups comp.lang.c
Subject Re: Why I use gcc
Date 2016-09-27 14:38 +0100
Organization A noiseless patient Spider
Message-ID <nsdsns$t9i$1@dont-email.me> (permalink)
References (7 earlier) <nsd885$pdm$1@dont-email.me> <nsdh8f$m60$1@dont-email.me> <nsdmh0$7ip$1@dont-email.me> <nsdpok$htr$1@dont-email.me> <nsdrjg$p7f$1@dont-email.me>

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On 27/09/2016 14:18, David Brown wrote:
> On 27/09/16 14:47, jacobnavia wrote:
>> Le 27/09/2016 à 13:52, David Brown a écrit :
>>> But implementations usually have some convenient way to call external
>>> functions.  On most systems, external functions and C compilers use the
>>> same standardised ABI, thus nothing special is needed for calling
>>> external functions.  On Windows, the ABI is not standardised either for
>>> the external functions, or for compilers, so you need a range of
>>> compiler-specific extensions for external interfacing.
>>
>> You are showing your own ignorance.
>>
>> Please read the documents for the windows ABI before you go on.
>
> Windows uses __cdecl, __stdcall, and __fastcall calling conventions.
> The Win32 API uses __stdcall normally, but other libraries can use
> different conventions.  Callbacks can use other choices.  Most 32-bit
> compilers on Windows use __cdecl calling convention by default - but
> some use different ones.

With Windows 32-bit, I've only come across what I call 'C' and 'Windows' 
conventions. I think the C one required the caller to adjust the stack, 
but with 'Windows' it was done for you. I don't think 16-bit was that 
different.

With callbacks (from Windows to application for example) then I think 
the callback function had to use the same convention as the caller. And 
worry about which registers to preserve.

>  I believe that for 64-bit Windows API, there is a single calling
> convention (which is different from the one used on all other x86-64
> systems, but at least it is consistent on Windows).

Yes, there's one instead of two. And extra rules to do with stack alignment.

However, on Windows 64 __stdcall disappears, but there appears to be a 
need to use __declspec(dllimport) in some contexts. I can't remember why 
that was needed or what problem it solved.

I haven't used Linux enough to know if there are a mix of conventions or 
not, or whether every single language (the ones that aren't just part of 
the gcc suite) has always used exactly the same convention as every 
other language. (I'm sure that C++ calling C needs to do something 
special in the source code to make it possible.)

In my case with my own languages I've had to be able to communicate with 
C libraries, and the Windows API, and to provide callbacks. I just do 
whatever is necessary. Internally, they might use their own conventions.

But having to specify a call convention isn't really the problem 
(compared to /using/ Win32, sticking a __stdcall somewhere should be the 
easy bit!). It's just that compilers seem to use several incompatible 
ways of doing so.

-- 
Bartc

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Thread

Why I use gcc BartC <bc@freeuk.com> - 2016-09-26 14:31 +0100
  Re: Why I use gcc David Brown <david.brown@hesbynett.no> - 2016-09-26 15:45 +0200
    Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-26 15:22 +0100
      Re: Why I use gcc David Brown <david.brown@hesbynett.no> - 2016-09-26 16:31 +0200
      Re: Why I use gcc Tim Rentsch <txr@alumni.caltech.edu> - 2016-09-27 15:05 -0700
        Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-28 00:42 +0100
          Re: Why I use gcc Tim Rentsch <txr@alumni.caltech.edu> - 2016-09-28 09:50 -0700
            Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-28 18:39 +0100
              Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-07 12:28 +0100
                Re: Why I use gcc Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-10-07 04:36 -0700
              Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-07 05:31 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-07 14:00 +0100
                Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-07 07:48 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-07 17:36 +0100
                Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-07 10:38 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-07 19:47 +0100
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-07 12:25 -0700
                Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-07 12:26 -0700
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-07 13:10 -0700
                Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-07 13:22 -0700
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-07 14:13 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 01:15 +0100
                Re: Why I use gcc James Harris <james.harris.1@gmail.com> - 2016-10-08 10:42 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 11:36 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-08 14:25 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 15:05 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 16:29 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-08 17:21 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-08 16:39 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 16:58 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-08 21:15 +0100
                Re: Why I use gcc supercat@casperkitty.com - 2016-10-08 11:27 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 20:09 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-08 21:16 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 21:28 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-09 01:19 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-09 01:36 +0100
                Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-08 09:32 -0700
                Re: Why I use gcc Tim Rentsch <txr@alumni.caltech.edu> - 2016-10-09 03:44 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-09 12:07 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-09 12:12 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-09 12:37 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-09 13:57 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-09 14:32 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-10-09 20:00 +0100
                Re: Why I use gcc Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-10-09 13:14 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-09 22:54 +0100
                Re: Why I use gcc Tim Rentsch <txr@alumni.caltech.edu> - 2016-10-15 14:40 -0700
                Re: Why I use gcc James Kuyper <jameskuyper@verizon.net> - 2016-10-07 10:37 -0400
                Re: Why I use gcc supercat@casperkitty.com - 2016-10-07 07:52 -0700
                Re: Why I use gcc jameskuyper@verizon.net - 2016-10-07 09:10 -0700
                Re: Why I use gcc supercat@casperkitty.com - 2016-10-07 10:48 -0700
                Re: Why I use gcc jameskuyper@verizon.net - 2016-10-07 16:21 -0700
                Re: Why I use gcc supercat@casperkitty.com - 2016-10-08 11:15 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-07 17:12 +0100
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-07 12:20 -0700
                Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-07 12:32 -0700
  Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-09-26 14:45 +0100
    Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-26 15:12 +0100
      Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-09-26 15:26 +0100
        Re: Why I use gcc supercat@casperkitty.com - 2016-09-26 08:00 -0700
          Re: Why I use gcc Tim Rentsch <txr@alumni.caltech.edu> - 2016-09-28 10:49 -0700
        Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-26 17:30 +0100
          Re: Why I use gcc David Brown <david.brown@hesbynett.no> - 2016-09-26 21:12 +0200
            Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-09-26 22:09 +0200
            Re: Why I use gcc supercat@casperkitty.com - 2016-09-26 13:32 -0700
              Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-09-26 23:14 +0200
                Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-09-26 22:47 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 01:13 +0100
                Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-09-27 01:18 +0100
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-09-26 17:41 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 02:01 +0100
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-09-27 08:41 -0700
                Re: Why I use gcc James Harris <james.harris.1@gmail.com> - 2016-09-27 01:41 +0100
                Re: Why I use gcc jameskuyper@verizon.net - 2016-09-26 18:15 -0700
                Re: Why I use gcc Gareth Owen <gwowen@gmail.com> - 2016-09-27 20:59 +0100
                Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-09-27 21:50 +0100
                Re: Why I use gcc Tim Rentsch <txr@alumni.caltech.edu> - 2016-09-28 06:26 -0700
                Re: Why I use gcc gazelle@shell.xmission.com (Kenny McCormack) - 2016-09-27 23:23 +0000
                Re: Why I use gcc Noob <root@127.0.0.1> - 2016-10-08 00:12 +0200
                Re: Why I use gcc James Kuyper <jameskuyper@verizon.net> - 2016-10-07 23:11 -0400
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-08 10:58 +0100
                Re: Why I use gcc jameskuyper@verizon.net - 2016-10-08 07:07 -0700
                Re: Why I use gcc Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-10-07 21:44 -0700
              Re: Why I use gcc David Brown <david.brown@hesbynett.no> - 2016-09-27 09:48 +0200
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 11:22 +0100
                Re: Why I use gcc David Brown <david.brown@hesbynett.no> - 2016-09-27 13:52 +0200
                Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-09-27 14:47 +0200
                Re: Why I use gcc David Brown <david.brown@hesbynett.no> - 2016-09-27 15:18 +0200
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 14:38 +0100
                Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-09-27 17:21 +0200
                Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-09-27 17:17 +0200
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-09-27 08:52 -0700
                Re: Why I use gcc Robert Wessel <robertwessel2@yahoo.com> - 2016-09-30 02:00 -0500
                Re: Why I use gcc supercat@casperkitty.com - 2016-09-27 07:18 -0700
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-09-27 08:46 -0700
                Re: Why I use gcc supercat@casperkitty.com - 2016-09-27 09:11 -0700
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-09-27 13:33 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 14:13 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-09-27 15:30 +0100
                Re: Why I use gcc supercat@casperkitty.com - 2016-09-27 08:29 -0700
                Re: Why I use gcc supercat@casperkitty.com - 2016-09-27 07:11 -0700
            Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-26 21:43 +0100
            Re: Why I use gcc raltbos@xs4all.nl (Richard Bos) - 2016-09-30 17:50 +0000
          Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 01:04 +0100
            Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-09-26 17:39 -0700
              Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 01:49 +0100
                Re: Why I use gcc Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-09-27 11:39 +0100
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-09-27 11:56 +0100
                Re: Why I use gcc Tim Rentsch <txr@alumni.caltech.edu> - 2016-09-27 15:15 -0700
                Re: Why I use gcc David Brown <david.brown@hesbynett.no> - 2016-09-28 08:55 +0200
    Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-09-26 22:11 +0200
      Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-09-26 22:04 +0100
  Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-10 11:39 +0100
    Re: Why I use gcc already5chosen@yahoo.com - 2016-10-10 07:32 -0700
      Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-10-10 16:17 +0100
        Re: Why I use gcc Robert Wessel <robertwessel2@yahoo.com> - 2016-10-10 21:09 -0500
          Re: Why I use gcc Richard Heathfield <rjh@cpax.org.uk> - 2016-10-11 04:18 +0100
          Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-11 10:56 +0100
            Re: Why I use gcc already5chosen@yahoo.com - 2016-10-11 04:08 -0700
              Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-11 13:36 +0100
                Re: Why I use gcc already5chosen@yahoo.com - 2016-10-11 06:20 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-11 14:29 +0100
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-11 09:31 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-11 19:38 +0100
                Re: Why I use gcc supercat@casperkitty.com - 2016-10-11 12:23 -0700
                Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-10-11 23:19 +0200
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-11 23:26 +0100
                Re: Why I use gcc jacobnavia <jacob@jacob.remcomp.fr> - 2016-10-12 09:01 +0200
                Re: Why I use gcc supercat@casperkitty.com - 2016-10-12 08:55 -0700
                Re: Why I use gcc already5chosen@yahoo.com - 2016-10-12 10:52 -0700
                Re: Why I use gcc supercat@casperkitty.com - 2016-10-12 12:34 -0700
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-12 13:18 -0700
                Re: Why I use gcc luser droog <luser.droog@gmail.com> - 2016-10-12 13:24 -0700
                Re: Why I use gcc crankypuss <undisclosedUserid@gmail.com> - 2016-10-13 13:31 -0600
                Re: Why I use gcc Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-10-16 03:00 -0700
                Re: Why I use gcc crankypuss <undisclosedUserid@gmail.com> - 2016-10-16 04:46 -0600
                Re: Why I use gcc Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-10-16 04:05 -0700
                Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-11 12:28 -0700
                Re: Why I use gcc Thiago Adams <thiago.adams@gmail.com> - 2016-10-11 13:24 -0700
                Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-11 21:28 +0100
                Re: Why I use gcc gazelle@shell.xmission.com (Kenny McCormack) - 2016-10-11 20:43 +0000
                Re: Why I use gcc Robert Wessel <robertwessel2@yahoo.com> - 2016-10-11 23:40 -0500
            Re: Why I use gcc already5chosen@yahoo.com - 2016-10-11 04:40 -0700
      Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-10 18:19 +0100
    Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-10 09:08 -0700
      Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-10 18:04 +0100
        Re: Why I use gcc supercat@casperkitty.com - 2016-10-10 10:39 -0700
        Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-10 11:25 -0700
      Re: Why I use gcc Jerry Stuckle <jstucklex@attglobal.net> - 2016-10-10 17:05 -0400
        Re: Why I use gcc supercat@casperkitty.com - 2016-10-10 14:46 -0700
    Re: Why I use gcc BartC <bc@freeuk.com> - 2016-10-15 13:39 +0100
      Re: Why I use gcc Keith Thompson <kst-u@mib.org> - 2016-10-15 13:40 -0700
        Re: Why I use gcc already5chosen@yahoo.com - 2016-10-15 13:46 -0700

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