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Re: argp, strndup and MinGW


From: Eric Blake
Subject: Re: argp, strndup and MinGW
Date: Fri, 20 Oct 2006 10:50:12 -0600
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According to Paul Eggert on 10/19/2006 3:44 PM:
> You can safely ignore that diagnostic.  Line 82 looks like this, right?
> 
>       ap->a.a_wide_char =
>         (sizeof (wint_t) < sizeof (int)
>          ? va_arg (args, int)
>          : va_arg (args, wint_t));
> 
> I assume that sizeof (wint_t) < sizeof (int) on your platform (please
> check this, though), so the diagnostic is about the va_arg (args,
> wint_t) subexpression that is never executed.  Newer GCC versions get
> this right, and avoid generating the diagnostic in subexpressions that
> are not executed.  Or maybe you just need to compile with -O.

That seems odd to me.  On cygwin, sizeof (wchar_t) is 2, but sizeof
(wint_t) sizeof (int) are 4.  And I assume the same is true for mingw,
since they are based on the same underlying OS.

- --
Life is short - so eat dessert first!

Eric Blake             address@hidden
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