[libstdc++] Don't access fpos_t.__state on uClibc w/o wchar support

[Bernardo Innocenti]

Gabriel Dos Reis wrote:
> Bernardo Innocenti <bernie@develer.com> writes:
> 
> | Don't access __state member of fpos_t when building on uClibc with
> | wchar support disabled.
> 
> |  +#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_WCHAR__)
> 
> Why can't you use the standard idiom
> 
>   #if _GLIBCXX_USE_WCHAR_T
> 
> ?

You're most probably right. I'm not sure what specific feature
I need to check for.

On uClibc, the fpos_t structure has an __mbstate member only
if __STDIO_MBSTATE is defined, which in turn depends on
__STDIO_WIDE, which depends on __UCLIBC_HAS_WCHAR__.

glibc always has the __state member in fpos_t regardless of
the configuration.

In my configuration I use neither wchar nor mbstate support,
so it's fine for me to use _GLIBCXX_USE_WCHAR_T, but is that
really appropriate?

-- 
  // Bernardo Innocenti - Develer S.r.l., R&D dept.
\X/  http://www.develer.com/

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