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Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9

From Ian Collins <ian-news@hotmail.com>
Newsgroups comp.lang.c
Subject Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9
Date 2018-11-28 15:37 +1300
Message-ID <g66dbaF8pfeU3@mid.individual.net> (permalink)
References <0fgrvdluhenh4otagch5r1pe7oprhpkhco@4ax.com>

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On 28/11/2018 11:38, Geoff wrote:
> First, this isn't a C question but I know there are a lot of
> GCC-knowledgeable people in this group so I'm seeking tribal
> knowledge.
> 
> This project used to compile without error on a previous version of
> Debian but now is failing to link on a newer version. The makefile and
> project code have not changed.
> 
> Link failure messages are of the type:
> ....
> performance.o: In function `atoi':
> performance.c:(.text+0x360): multiple definition of `atoi'
> g_ai.o:g_ai.c:(.text+0x360): first defined here
> performance.o: In function `atol':
> performance.c:(.text+0x380): multiple definition of `atol'
> g_ai.o:g_ai.c:(.text+0x380): first defined here
> performance.o: In function `atoll':
> performance.c:(.text+0x390): multiple definition of `atoll'
> g_ai.o:g_ai.c:(.text+0x390): first defined here
> ....
> 
> All the errors appear to concern multiple definitions of
> implementation and library symbols/functions.

Have you checked the obvious such as including the the correct standard 
headers?

-- 
Ian.

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Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-27 14:38 -0800
  Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Ian Collins <ian-news@hotmail.com> - 2018-11-28 15:37 +1300
    Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-27 19:53 -0800
      Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Ian Collins <ian-news@hotmail.com> - 2018-11-28 17:42 +1300
        Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-27 22:06 -0800
          Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Ian Collins <ian-news@hotmail.com> - 2018-11-28 20:45 +1300
            Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-28 10:30 -0800
              Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 jameskuyper@alumni.caltech.edu - 2018-11-28 11:01 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-29 01:35 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 James Kuyper <jameskuyper@alumni.caltech.edu> - 2018-11-29 08:15 -0500
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-30 12:48 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-30 14:49 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Keith Thompson <kst-u@mib.org> - 2018-11-30 14:56 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-30 15:46 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 David Brown <david.brown@hesbynett.no> - 2018-12-01 17:51 +0100
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Richard Damon <Richard@Damon-Family.org> - 2018-12-01 13:37 -0500
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 David Brown <david.brown@hesbynett.no> - 2018-12-02 12:49 +0100
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Richard Damon <Richard@Damon-Family.org> - 2018-12-02 08:16 -0500
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 David Brown <david.brown@hesbynett.no> - 2018-12-02 14:45 +0100
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-12-04 08:51 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 scott@slp53.sl.home (Scott Lurndal) - 2018-12-04 17:16 +0000
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 William Ahern <william@25thandClement.com> - 2018-12-04 12:26 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-12-05 07:08 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 William Ahern <william@25thandClement.com> - 2018-12-05 13:39 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-12-05 20:25 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Tim Rentsch <txr@alumni.caltech.edu> - 2018-12-06 07:01 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Tim Rentsch <txr@alumni.caltech.edu> - 2018-11-29 10:26 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-30 12:59 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Tim Rentsch <txr@alumni.caltech.edu> - 2018-12-01 07:23 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Tim Rentsch <txr@alumni.caltech.edu> - 2018-12-02 03:56 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-12-02 08:10 -0800
                Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Tim Rentsch <txr@alumni.caltech.edu> - 2018-12-03 14:00 -0800
              Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Nick Bowler <nbowler@draconx.ca> - 2018-11-28 19:42 +0000
              Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Tim Rentsch <txr@alumni.caltech.edu> - 2018-11-29 10:09 -0800
          Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 jameskuyper@alumni.caltech.edu - 2018-11-28 05:55 -0800
            Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-28 10:36 -0800
  Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Bart <bc@freeuk.com> - 2018-11-28 13:13 +0000
    Re: Multiple Includes Causing Multiple Definitions? (GCC 6.3.0) on Debian 9 Geoff <geoff@invalid.invalid> - 2018-11-30 13:39 -0800

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