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Groups > comp.lang.c > #102471

Re: How to find the problem in the object file

From Richard Heathfield <rjh@cpax.org.uk>
Newsgroups comp.lang.c
Subject Re: How to find the problem in the object file
Date 2017-01-26 16:34 +0000
Organization Fix this later
Message-ID <o6d8av$2gr$1@dont-email.me> (permalink)
References <23ab01a2-5220-42cb-80b2-20a2b4a35d5c@googlegroups.com> <o6cut4$tfv$1@dont-email.me> <2beebc58-3f8f-46c6-bd10-e2ec3cf87906@googlegroups.com> <o6d2ai$bcf$1@dont-email.me> <a72e083a-064a-4eca-b37a-c8950ba5289a@googlegroups.com>

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On 26/01/17 16:29, Alla _ wrote:
> On Thursday, January 26, 2017 at 5:51:41 PM UTC+3, David Brown wrote:
>> It looks like you are using clang as your compiler.  What compiler flags
>> are you using?  And are you using more than one source file but not
>> using a header to declare the external function(s)?  If this kind of
>> error is getting as far as the linker, you either have a poor choice of
>> compiler flags, or you are declaring external functions in your C files
>> rather than in a header file.  Either way, it should not be hard to
>> avoid such mistakes (once you know the settings to use, of course).
>
> Not me - Apple has changed gcc for clang. But I still use gcc command,
> clang knows how to interpret that.
> -Wall -Werror -Wextra -pedantic -std=c99 ...
> And no, I don't yet have any separate header files; everything is still
> within one file. Headers are for later.

Those flags are fine. The absence of a compiler warning suggests 
strongly, as I pointed out earlier, that you had declared a prototype 
for the function, but didn't have the function body itself.

Anyway, you now know what went wrong and why, and it seems that you've 
already fixed the problem, so all is well for the time being.

-- 
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
Sig line 4 vacant - apply within

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Thread

How to find the problem in the object file Alla _ <modelling.data@gmail.com> - 2017-01-26 05:14 -0800
  Re: How to find the problem in the object file BartC <bc@freeuk.com> - 2017-01-26 13:22 +0000
    Re: How to find the problem in the object file BartC <bc@freeuk.com> - 2017-01-26 13:37 +0000
  Re: How to find the problem in the object file Richard Heathfield <rjh@cpax.org.uk> - 2017-01-26 13:53 +0000
    Re: How to find the problem in the object file Alla _ <modelling.data@gmail.com> - 2017-01-26 06:20 -0800
      Re: How to find the problem in the object file BartC <bc@freeuk.com> - 2017-01-26 14:28 +0000
        Re: How to find the problem in the object file Alla _ <modelling.data@gmail.com> - 2017-01-26 06:48 -0800
        Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-01-26 08:29 -0800
          Re: How to find the problem in the object file BartC <bc@freeuk.com> - 2017-01-26 16:54 +0000
            Re: How to find the problem in the object file luser droog <luser.droog@gmail.com> - 2017-01-26 09:01 -0800
            Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-01-26 11:20 -0800
            Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-01-26 23:12 +0100
              Re: How to find the problem in the object file BartC <bc@freeuk.com> - 2017-01-27 01:32 +0000
                Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-01-27 09:50 +0100
          Re: How to find the problem in the object file supercat@casperkitty.com - 2017-01-26 09:19 -0800
            Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-01-26 11:21 -0800
              Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-02 02:39 -0800
                Re: How to find the problem in the object file fir <profesor.fir@gmail.com> - 2017-02-02 04:08 -0800
                Re: How to find the problem in the object file fir <profesor.fir@gmail.com> - 2017-02-02 04:31 -0800
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-04 10:48 -0800
                Re: How to find the problem in the object file fir <profesor.fir@gmail.com> - 2017-02-04 11:07 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-02 10:22 -0800
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-04 11:00 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-04 14:14 -0800
                Re: How to find the problem in the object file Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-04 20:02 -0800
                Re: How to find the problem in the object file supercat@casperkitty.com - 2017-02-05 13:39 -0800
                Re: How to find the problem in the object file Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-05 13:44 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-05 13:56 -0800
                Re: How to find the problem in the object file Ian Collins <ian-news@hotmail.com> - 2017-02-06 13:07 +1300
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-05 16:14 -0800
                Re: How to find the problem in the object file Ian Collins <ian-news@hotmail.com> - 2017-02-06 13:24 +1300
                Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-02-06 01:59 +0100
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-08 21:32 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-05 13:54 -0800
                Re: How to find the problem in the object file Ian Collins <ian-news@hotmail.com> - 2017-02-06 11:18 +1300
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-08 21:32 -0800
                Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-02-09 10:33 +0100
                Re: How to find the problem in the object file supercat@casperkitty.com - 2017-02-09 09:10 -0800
                Re: How to find the problem in the object file Ian Collins <ian-news@hotmail.com> - 2017-02-10 08:01 +1300
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-09 09:01 -0800
                Re: How to find the problem in the object file supercat@casperkitty.com - 2017-02-09 09:35 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-09 09:57 -0800
                Re: How to find the problem in the object file Jean-Marc Bourguet <jm@bourguet.org> - 2017-02-09 20:45 +0100
                Re: How to find the problem in the object file supercat@casperkitty.com - 2017-02-09 14:59 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-09 15:20 -0800
                Re: How to find the problem in the object file supercat@casperkitty.com - 2017-02-09 16:12 -0800
                Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-02-13 10:21 +0100
                Re: How to find the problem in the object file supercat@casperkitty.com - 2017-02-13 07:20 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-13 09:28 -0800
                Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-02-13 09:55 +0100
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-16 03:36 -0800
                Re: How to find the problem in the object file Jean-Marc Bourguet <jm@bourguet.org> - 2017-02-09 20:56 +0100
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-16 07:00 -0800
                Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-02-16 20:03 +0100
                Re: How to find the problem in the object file Ian Collins <ian-news@hotmail.com> - 2017-02-17 09:22 +1300
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-16 13:07 -0800
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-24 09:21 -0800
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-24 09:02 -0800
                Re: How to find the problem in the object file Ian Collins <ian-news@hotmail.com> - 2017-02-25 09:05 +1300
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-24 09:26 -0800
                Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-02-25 19:38 +0100
                Re: How to find the problem in the object file Ian Collins <ian-news@hotmail.com> - 2017-02-03 07:32 +1300
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-04 11:24 -0800
                Re: How to find the problem in the object file Robert Wessel <robertwessel2@yahoo.com> - 2017-02-02 16:56 -0600
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-04 11:12 -0800
                Re: How to find the problem in the object file Robert Wessel <robertwessel2@yahoo.com> - 2017-02-06 04:47 -0600
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-08 21:59 -0800
                Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-02-09 09:13 -0800
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-15 19:28 -0800
                Re: How to find the problem in the object file Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-24 17:48 -0800
                Re: How to find the problem in the object file Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-25 17:36 -0800
      Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-01-26 15:51 +0100
        Re: How to find the problem in the object file Alla _ <modelling.data@gmail.com> - 2017-01-26 08:29 -0800
          Re: How to find the problem in the object file Richard Heathfield <rjh@cpax.org.uk> - 2017-01-26 16:34 +0000
            Re: How to find the problem in the object file Alla _ <modelling.data@gmail.com> - 2017-01-26 09:48 -0800
          Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-01-26 08:52 -0800
          Re: How to find the problem in the object file James Kuyper <jameskuyper@verizon.net> - 2017-01-26 13:53 -0500
            Re: How to find the problem in the object file supercat@casperkitty.com - 2017-01-26 11:00 -0800
          Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-01-26 23:49 +0100
            Re: How to find the problem in the object file Alla _ <modelling.data@gmail.com> - 2017-01-27 06:08 -0800
              Re: How to find the problem in the object file David Brown <david.brown@hesbynett.no> - 2017-01-27 16:20 +0100
        Re: How to find the problem in the object file Keith Thompson <kst-u@mib.org> - 2017-01-26 08:41 -0800
          Re: How to find the problem in the object file m.labanowicz@gmail.com - 2017-01-27 01:26 -0800

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