Re: Help: Ada in NetBSD

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From	Simon Wright <simon@pushface.org>
Newsgroups	comp.lang.ada
Subject	Re: Help: Ada in NetBSD
Date	Sun, 29 Aug 2021 19:25:05 +0100
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Fernando Oleo Blanco <irvise_ml@irvise.xyz> writes:

>> On NetBSD there are several symbols that are replaced by the virtue
>> of including a C header.
>> If you include correctly the C header, the correct symbol is used
>> and you don't get the linker warning.
>
> That is what I did by adding the indicated header files to the NetBSD
> section of the init.c file. No other systems have them there (or 
> anywhere in some cases). I expected that to fix the issue, but it did not.

The problem can't be fixed by including C headers, because ...

>> For gettimeofday the symbol is replaced by __gettimeofday50.
>> These symbols are marked with __RENAME(XXX) macros in the C headers.

The C header is (I got this from the net, so beware)

int	gettimeofday(struct timeval * __restrict, void *__restrict)
    __RENAME(__gettimeofday50);

so when you say, in Ada,

   function gettimeofday
     (tv : not null access struct_timeval;
      tz : struct_timezone_ptr) return Integer;
   pragma Import (C, gettimeofday, "gettimeofday");

the linker looks for a symbol gettimeofday (or maybe _gettimeofday) and
gives you the warning that you report. Since it's just a warning, it may
actually work - for the moment, anyway.

The Ada needs to change to

   function gettimeofday
     (tv : not null access struct_timeval;
      tz : struct_timezone_ptr) return Integer;
   pragma Import (C, gettimeofday, "gettimeofday50");

(or maybe "_gettimeofday50", or even "__gettimeofday50" - nm will be
your friend).

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Thread

Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-29 13:06 +0200
  Re: Help: Ada in NetBSD Stephane Carrez <stephane.carrez@gmail.com> - 2021-08-29 06:19 -0700
    Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-29 20:08 +0200
      Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-08-29 19:25 +0100
        Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-29 22:36 +0200
          Re: Help: Ada in NetBSD Stephane Carrez <stephane.carrez@gmail.com> - 2021-08-29 15:08 -0700
            Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-08-30 08:37 +0100
            Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-30 10:14 +0200
              Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-30 12:24 +0200
                Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-30 14:15 +0200
                Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-30 20:49 +0200
                Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-08-30 20:23 +0100
                Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-01 11:44 +0200
                Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-09-01 22:41 +0100
                Re: Help: Ada in NetBSD "Randy Brukardt" <randy@rrsoftware.com> - 2021-09-02 17:16 -0500
                Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-09-03 21:18 +0100
  Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-08-29 18:34 +0100
    Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-08-29 19:45 +0200
  Re: Help: Ada in NetBSD "John R. Marino" <mfl-commissioner@marino.st> - 2021-09-01 06:28 -0700
    Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-01 16:58 +0200
      Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-17 19:36 +0200
        Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-18 18:39 +0200
          Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-22 22:05 +0200
            Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-09-22 21:57 +0100
            Re: Help: Ada in NetBSD "Luke A. Guest" <laguest@archeia.com> - 2021-09-23 09:04 +0100
              Re: Help: Ada in NetBSD Kevin Chadwick <m8il1ists@gmail.com> - 2021-09-23 03:48 -0700
                Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-23 19:01 +0200
              Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-23 19:04 +0200
            Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-23 21:53 +0200
              Re: Help: Ada in NetBSD Simon Wright <simon@pushface.org> - 2021-09-24 08:48 +0100
                Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-24 11:44 +0200
    Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-13 20:49 +0200
      Re: Help: Ada in NetBSD Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-09-13 18:24 -0400
        Re: Help: Ada in NetBSD Fernando Oleo Blanco <irvise_ml@irvise.xyz> - 2021-09-17 19:19 +0200

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