Mailinglist Archive: opensuse (1125 mails)

[Cristian Rodríguez <crrodriguez@xxxxxxxxxxxx>]

El 11/05/12 15:06, David C. Rankin escribió:

>    The compiler issues 2 warning (obviously the problem) that I cannot fix?
>
> 13:55 alchemy:~/dev/prg/ccpp/src-c/io/file>  gcc -Wall -oct contest.c
> contest.c: In function ‘concat’:
> contest.c:61:4: warning: implicit declaration of function ‘mempcpy’
> contest.c:61:9: warning: incompatible implicit declaration of built-in function
> ‘mempcpy’

Here is the bug in your code (and actually, a widely spread error, so no 
need to pull your hair on frustration :))

> #include<stdio.h>
> #include<stdlib.h>
> #include<string.h>
> #include<stdarg.h>
>
> #ifndef _GNU_SOURCE
> #define _GNU_SOURCE
> #endif


This piece

> #ifndef _GNU_SOURCE
> #define _GNU_SOURCE
> #endif

have to go BEFORE

> #include<stdio.h>
> #include<stdlib.h>
> #include<string.h>
> #include<stdarg.h>

CHeers.

ps: gcc 4.7 with -O2 may axe your strcat 's and perform the optimization 
for you.




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