[Bug libstdc++/43241] New: std::tr1::regex does not link

[pinskia at gcc dot gnu dot org]

A simple testcase:
 #include <tr1/regex>
 int main() {std::tr1::regex r("^$"); }
--- CUT ---
Does not link.  It did with 4.3 though. 
/tmp/ccyEcV0U.o: In function `std::tr1::basic_regex<char,
std::tr1::regex_traits<char> >::basic_regex(char const*, unsigned int)':
t.cc:(.text._ZNSt3tr111basic_regexIcNS_12regex_traitsIcEEEC2EPKcj[_ZNSt3tr111basic_regexIcNS_12regex_traitsIcEEEC5EPKcj]+0x73):
undefined reference to `std::tr1::basic_regex<char,
std::tr1::regex_traits<char> >::_M_compile()'


-- CUT ---
I noticed that std::tr1::basic_regex::_M_compile in 4.3 was just an empty
function in 4.3 but an external function in 4.4 and above.


-- 
           Summary: std::tr1::regex does not link
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43241