Re: Error gcc

[Salvator*eL*arosa <s_larosa@libero.it>]

Davide Prina wrote:
> 
> Salvator*eL*arosa wrote:
> 
>> Scusate ma intendevo dire cosa significa :
>> -Werror-implicit-function-declaration -fno-common 
> 
> $ man gcc
> [...]
> -Werror-implicit-function-declaration
>    Give a warning (or error) whenever a function is used before being
>    declared. The form -Wno-error-implicit-function-declaration is not
>    supported.  This warning is enabled by -Wall (as a warning, not an
>    error).
> [...]
> -fno-common
>    In C, allocate even uninitialized global variables in the data section
>    of the object file, rather than generating them as common blocks.
>    This has the effect that if the same variable is declared (without
>    "extern") in two different compilations, you will get an error when
>    you link them.  The only reason this might be useful is if you wish to
>    verify that the program will work on other systems which always work
>    this way.
> [...]
> 
> in pratica sono due opzioni di compilazione che fanno generare degli 
> errori/warning in determinate condizioni ... cioè se nel sorgente che 
> stai compilando sono verificate alcune condizioni, allora vengono 
> generati tali errori/warning
> 
> Ciao
> Davide
> 
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> 
> 
> 
Grazie mille, esaustivo come sempre....
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