[Bug libstdc++/85732] use_facet>(mylocale) retrieving wrong locale information

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85732

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:

#include <iostream>
#include <locale>

using namespace std;

void test(std::locale loc)
{
  cout << "--> Setting locale '" << loc.name() << "'\n";
  const moneypunct<char, true> & l_facMoneyIntl = use_facet<moneypunct<char,
true> >(loc);
  const moneypunct<char, false> & l_facMoneyNatl = use_facet<moneypunct<char,
false> >(loc);
  cout << "Natl Currency Symbol     = '"; cout << l_facMoneyNatl.curr_symbol();
cout << "'" << "\n";
  cout << "Intl Currency Symbol     = '"; cout << l_facMoneyIntl.curr_symbol();
cout << "'" << "\n";
  cout << "\n";
}

int main(int argc, char** argv)
{
  locale global ("");
  // locale::global(global);
  test(locale(argc == 1 ? "pt_BR.utf8" : argv[1]));
  test(global);
  test(locale("C"));
}


Without -static this produces something like:

--> Setting locale 'pt_BR.utf8'
Natl Currency Symbol     = 'R$'
Intl Currency Symbol     = 'BRL '

--> Setting locale
'LC_CTYPE=en_GB.UTF-8;LC_NUMERIC=en_GB.UTF-8;LC_TIME=en_GB.UTF-8;LC_COLLATE=C;LC_MONETARY=en_GB.UTF-8;LC_MESSAGES=en_GB.UTF-8;LC_PAPER=en_GB.UTF-8;LC_NAME=en_GB.UTF-8;LC_ADDRESS=en_GB.UTF-8;LC_TELEPHONE=en_GB.UTF-8;LC_MEASUREMENT=en_GB.UTF-8;LC_IDENTIFICATION=en_GB.UTF-8'
Natl Currency Symbol     = '£'
Intl Currency Symbol     = 'GBP '

--> Setting locale 'C'
Natl Currency Symbol     = ''
Intl Currency Symbol     = ''

But with -static the fields are all blank:

--> Setting locale 'pt_BR.utf8'
Natl Currency Symbol     = ''
Intl Currency Symbol     = ''

--> Setting locale
'LC_CTYPE=en_GB.UTF-8;LC_NUMERIC=en_GB.UTF-8;LC_TIME=en_GB.UTF-8;LC_COLLATE=C;LC_MONETARY=en_GB.UTF-8;LC_MESSAGES=en_GB.UTF-8;LC_PAPER=en_GB.UTF-8;LC_NAME=en_GB.UTF-8;LC_ADDRESS=en_GB.UTF-8;LC_TELEPHONE=en_GB.UTF-8;LC_MEASUREMENT=en_GB.UTF-8;LC_IDENTIFICATION=en_GB.UTF-8'
Natl Currency Symbol     = ''
Intl Currency Symbol     = ''

--> Setting locale 'C'
Natl Currency Symbol     = ''
Intl Currency Symbol     = ''


I can reproduce this with any version tested (back to 4.3.6).