On 9 February 2012 15:24, marco atzeri wrote:
> On 2/9/2012 1:37 PM, Corinna Vinschen wrote:
>>
>> On Feb 9 12:13, marco atzeri wrote:
>>>
>>> Attached a small example taken from Bruce Eckel Thinking in C++
>>>
>>> On cygwin both this call
>>>
>>> cout.imbue(locale("en_US.UTF-8"));
>>>
>>> cout.imbue(locale("fr_FR.UTF-8"));
>>>
>>> raise exception
>>>
>>> "terminate called after throwing an instance of 'std::runtime_error'
>>> what(): locale::facet::_S_create_c_locale name not valid
>>> Aborted (core dumped)"
>>>
>>> I could understand eventually the second one, but "English (US)" is
>>> the current windows locale so I expected that at least "en_US.UTF-8"
>>> is accepted.
>>>
>>> What I am missing ?
>>
>>
>> This doesn't look like a Cygwin issue. The above error
>> "locale::facet::_S_create_c_locale name not valid" points to some
>> problem in the library implementing the locale call. The underlying
>> plain C call setlocale should work fine.
>>
>>
>> Corinna
>>
>
> g++ 4.5.3 seems to have a problem on cygwin.
>
> setlocale on pure C is working
> (modified from
> http://www.cplusplus.com/reference/clibrary/clocale/setlocale/)
>
> $ ./setlocale.exe
> Locale is: C
> Date is: Thu Feb 9 14:52:45 2012
> Currency symbol is:
> -
> Locale is: fr_FR.UTF-8
> Date is: jeu. 9 févr. 2012 14:52:45
> Currency symbol is: €
> -
>
>
> Dave,
> it could be related to libstdc++ built with a different
> --enable-clocale option ?
The problem is that Cygwin/newlib does not have good enough locale
support. C99 locale support is not good enough for std::locale
implementation. Mainly because the functions that change the locale
affect the whole process. It is necessary to have at least per thread
locale for std::locale to be implementable; it is better to have some
sort of locale structure to pass around. AFAIK this can be
implemented using functions provided by xlocale.h (MacOS X, [1]).
>
> http://gcc.gnu.org/onlinedocs/libstdc++/manual/build.html
>
> Or that functionality is not available on cygwin ?
[1]
<http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/xlocale.3.html>
--
VZ
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
