Hello list, this is my first post to you :) I've got a problem with handling locales and string_algo. As an example I want so make this string "hää?" uppercase (->"HÄÄ?") by using this piece of code: <code> #include <iostream> #include <locale> #include <string> #include <boost/algorithm/string.hpp> using namespace std; using namespace boost; int main(int argc, char** argv) { string loc_name = "de_DE.utf8"; string str("hää?"); str = to_upper_copy(str,locale(loc_name.c_str())); // ...should give "HÄÄ?" cout << str << endl; // but prints "Hää?" return 0; } </code> As you see I'm trying to use locales, but it doesn't work. What is my mistake?? Thanks in advance, Maik PS: - I'm using gentoo-linux with gcc-4.1.1 - My locales list: LANG=de_DE.utf8 LC_CTYPE="de_DE.utf8" LC_NUMERIC="de_DE.utf8" LC_TIME="de_DE.utf8" LC_COLLATE="de_DE.utf8" LC_MONETARY="de_DE.utf8" LC_MESSAGES="de_DE.utf8" LC_PAPER="de_DE.utf8" LC_NAME="de_DE.utf8" LC_ADDRESS="de_DE.utf8" LC_TELEPHONE="de_DE.utf8" LC_MEASUREMENT="de_DE.utf8" LC_IDENTIFICATION="de_DE.utf8" LC_ALL=de_DE.utf8