std::locale broken in gcc

[dirk@…]

When compiling the following code:

#include <locale>
#include <iostream>
#include <exception>
#include <clocale>

void
try_c_locale(const char* locale_name)
{
    if( std::setlocale(LC_ALL, locale_name) == NULL )
        printf("Failed to setlocale(LC_ALL, \"%s\")\n", locale_name);
    else
        printf("Succeeded in calling setlocale(LC_ALL, \"%s\")\n", locale_name);
}

void
try_cpp_locale(const char* locale_name)
{
    try
    {
        std::locale my_locale(locale_name);
    }
    catch(std::exception& e)
    {
        printf("Failed ctor for std::locale with \"%s\": %s\n", locale_name, e.what());
        return;
    }

    printf("Succeeded ctor for std::locale with \"%s\"\n", locale_name);
}

int
main(void)
{
    // Some locales from "locale -a" on my OS X system, here is proof
    // that these locales do exist on my system. Take my word for it
    // that "locale -a" also shows these locales existing on my linux
    // system as well.
    //
    // rutski@imac:~$ locale -a | tail -n 2
    // C
    // POSIX
    // rutski@imac:~$ locale -a | grep en_US
    // en_US
    // en_US.ISO8859-1
    // en_US.ISO8859-15
    // en_US.US-ASCII
    // en_US.UTF-8
    // rutski@imac:~$ locale -a | grep pl_PL
    // pl_PL
    // pl_PL.ISO8859-2
    // pl_PL.UTF-8
    // rutski@imac:~$ 

    const char* test_locales[] =
    {
        "C",
        "POSIX",
        "en_US",
        "en_US.UTF-8",
         "pl_PL",
        "pl_PL.ISO8859-2"
    };
    
    printf("Trying c locales...\n");
    for(size_t x = 0; x < sizeof(test_locales)/sizeof(char*); x++)
        try_c_locale(test_locales[x]);
    printf("\n");

    printf("Trying C++ locales...\n");
    for(size_t x = 0; x < sizeof(test_locales)/sizeof(char*); x++)
        try_cpp_locale(test_locales[x]);
}

the output clearly states there is something wrong:

Trying c locales...
Succeeded in calling setlocale(LC_ALL, "C")
Succeeded in calling setlocale(LC_ALL, "POSIX")
Succeeded in calling setlocale(LC_ALL, "en_US")
Succeeded in calling setlocale(LC_ALL, "en_US.UTF-8")
Succeeded in calling setlocale(LC_ALL, "pl_PL")
Succeeded in calling setlocale(LC_ALL, "pl_PL.ISO8859-2")

Trying C++ locales...
Succeeded ctor for std::locale with "C"
Succeeded ctor for std::locale with "POSIX"
Failed ctor for std::locale with "en_US": locale::facet::_S_create_c_locale name not valid
Failed ctor for std::locale with "en_US.UTF-8": locale::facet::_S_create_c_locale name not valid
Failed ctor for std::locale with "pl_PL": locale::facet::_S_create_c_locale name not valid
Failed ctor for std::locale with "pl_PL.ISO8859-2": locale::facet::_S_create_c_locale name not valid

a google serach delivers this:

​http://groups.google.com/group/gnu.gcc.help/browse_thread/thread/99d874aed6b46fdd

appearantly, a --enable-clocale to configure might do something

however, macport's configure stage does not allow for adding options (or I could not find it)

• could this be fixed in gcc? (in libstdc++)
• could this be added to macport (adding extra configure options)

[dirk@…]

Cc Me!

[jmroot (Joshua Root)]

Which gcc port are you using?

[dirk@…]

Replying to jmr@macports.org:

Which gcc port are you using?

Sorry, I forgot: gcc43

(But I think it will be so for all gcc's; apple's own xcode has it too, which is gcc 4.0)

[(none)]

Milestone Port Bugs deleted

[felipou (Felipe Machado)]

This problem still applies to ports gcc48 and gcc47.

[gewesp@…]

This still exists in 5.2.

It makes g++ unusable for any serious development.

[gewesp@…]

Cc Me!