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Re: Warning: assignment from incompatible pointer type

From David Brown <david.brown@hesbynett.no>
Newsgroups comp.lang.c
Subject Re: Warning: assignment from incompatible pointer type
Date 2017-06-22 20:41 +0200
Organization A noiseless patient Spider
Message-ID <oih2qq$902$1@dont-email.me> (permalink)
References (7 earlier) <lIM2B.59754$OJ2.17773@fx37.am4> <87k24489ep.fsf@bsb.me.uk> <uLP2B.31163$9u1.10034@fx06.am4> <lnmv90aqgf.fsf@kst-u.example.com> <Y4T2B.31574$ZH4.15280@fx10.am4>

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On 22/06/17 19:26, bartc wrote:
> On 22/06/2017 18:21, Keith Thompson wrote:
>> bartc <bc@freeuk.com> writes:
>> [...]
>>> This is just the result of [a] silly decision in C to make char signed.
>>>
>>> And all compilers I've just tested make it signed, with default options.
>>> (But FWIW, I was testing with my own compiler where char is unsigned.)
>>
>> As you know, the signedness of plain char is implementation-defined.
> 
> But IME it tends to be signed.

On x86 it is usually signed.  On other targets, it can be different.

> 
> It shouldn't matter (when programs allow for it). Yet it seems it does 
> otherwise you would expect more instances of unsigned char as the 
> default char type.
> 

The signedness of char should not matter.  If you need an unsigned char, 
use unsigned char (or uint8_t if that is more accurate).  If you need a 
signed char, use signed char (or int8_t).

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Thread

Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-20 12:48 -0400
  Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-20 18:08 +0100
    Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-21 09:32 -0400
      Re: Warning: assignment from incompatible pointer type scott@slp53.sl.home (Scott Lurndal) - 2017-06-21 13:48 +0000
  Re: Warning: assignment from incompatible pointer type Richard Heathfield <rjh@cpax.org.uk> - 2017-06-20 18:15 +0100
    Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-20 18:00 -0400
      Re: Warning: assignment from incompatible pointer type "James R. Kuyper" <jameskuyper@verizon.net> - 2017-06-20 18:47 -0400
        Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-21 00:10 +0100
        Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-20 19:56 -0400
  Re: Warning: assignment from incompatible pointer type "James R. Kuyper" <jameskuyper@verizon.net> - 2017-06-20 13:23 -0400
    Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-20 18:59 -0400
  Re: Warning: assignment from incompatible pointer type Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-20 19:23 +0100
    Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-20 18:59 -0400
      Re: Warning: assignment from incompatible pointer type Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2017-06-20 19:46 -0400
      Re: Warning: assignment from incompatible pointer type Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-21 02:05 +0100
        Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-20 21:37 -0400
          Re: Warning: assignment from incompatible pointer type Richard Heathfield <rjh@cpax.org.uk> - 2017-06-21 09:25 +0100
          Re: Warning: assignment from incompatible pointer type David Brown <david.brown@hesbynett.no> - 2017-06-21 13:35 +0200
            Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-21 22:30 -0400
              Re: Warning: assignment from incompatible pointer type Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-22 11:03 +0100
              Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-22 11:10 +0100
                Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-22 11:42 +0100
                Re: Warning: assignment from incompatible pointer type David Brown <david.brown@hesbynett.no> - 2017-06-22 13:49 +0200
                Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-22 14:40 +0100
                Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-22 17:00 +0100
                Re: Warning: assignment from incompatible pointer type David Brown <david.brown@hesbynett.no> - 2017-06-22 20:08 +0200
                Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-22 15:46 -0400
                Re: Warning: assignment from incompatible pointer type Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-22 14:00 +0100
                Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-22 14:38 +0100
                Re: Warning: assignment from incompatible pointer type Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-22 17:26 +0100
                Re: Warning: assignment from incompatible pointer type Keith Thompson <kst-u@mib.org> - 2017-06-22 10:21 -0700
                Re: Warning: assignment from incompatible pointer type bartc <bc@freeuk.com> - 2017-06-22 18:26 +0100
                Re: Warning: assignment from incompatible pointer type David Brown <david.brown@hesbynett.no> - 2017-06-22 20:41 +0200
                Re: Warning: assignment from incompatible pointer type Richard Heathfield <rjh@cpax.org.uk> - 2017-06-22 19:59 +0100
                Re: Warning: assignment from incompatible pointer type Keith Thompson <kst-u@mib.org> - 2017-06-22 12:28 -0700
          Re: Warning: assignment from incompatible pointer type Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-21 09:49 -0400
            Re: Warning: assignment from incompatible pointer type DFS <nospam@dfs.com> - 2017-06-21 10:36 -0400
              Re: Warning: assignment from incompatible pointer type Jerry Stuckle <jstucklex@attglobal.net> - 2017-06-21 14:15 -0400
          Re: Warning: assignment from incompatible pointer type Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-06-21 15:10 +0100

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