X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-2.4 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW X-Spam-Check-By: sourceware.org MIME-Version: 1.0 In-Reply-To: <4F33D71A.9040105@gmail.com> References: <4F33AA60.6080704@gmail.com> <20120209123738.GG23330@calimero.vinschen.de> <4F33D71A.9040105@gmail.com> Date: Thu, 9 Feb 2012 16:22:23 +0100 Message-ID: Subject: Re: how to set locale with C++ From: =?UTF-8?Q?V=C3=A1clav_Zeman?= To: cygwin@cygwin.com Content-Type: text/plain; charset=UTF-8 X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id q19FMjLU032400 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] -- 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