ich habe ein Linker-Problem mit tr1/regex. Das hier kompiliert nicht:

#include <tr1/regex>
#include <cassert>

int main () {
  std::tr1::regex rgx("ello");
  assert(std::tr1::regex_search("Hello World", rgx));
}

Der Linker sagt:

make -k 
g++ -c -pipe -std=c++0x -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -o const_try.o const_try.cpp
/usr/include/c++/4.4/tr1_impl/regex:2255: warning: inline function ‘bool std::tr1::regex_search(_Bi_iter, _Bi_iter, std::tr1::match_results<_Bi_iter, _Allocator>&, const std::tr1::basic_regex<_Ch_type, _Rx_traits>&, std::tr1::regex_constants::match_flag_type) [with _Bi_iter = const char*, _Allocator = std::allocator<std::tr1::sub_match<const char*> >, _Ch_type = char, _Rx_traits = std::tr1::regex_traits<char>]’ used but never defined
g++ -Wl,-O1 -o const_try const_try.o    -L/usr/lib -lQtGui -lQtCore -lpthread 
const_try.o: In function `main':
const_try.cpp:(.text+0xdc): undefined reference to `std::tr1::basic_regex<char, std::tr1::regex_traits<char> >::_M_compile()'
const_try.cpp:(.text+0x142): undefined reference to `bool std::tr1::regex_search<char const*, std::allocator<std::tr1::sub_match<char const*> >, char, std::tr1::regex_traits<char> >(char const*, char const*, std::tr1::match_results<char const*, std::allocator<std::tr1::sub_match<char const*> > >&, std::tr1::basic_regex<char, std::tr1::regex_traits<char> > const&, std::bitset<11u>)'
collect2: ld returned 1 exit status
...

Zuerst dachte ich: Klar, es fehlt die entsprechende Linker-Option auf die Library, aber das kann nicht sein, weil das hier kompiliert :

#include <tr1/array>
#include <iostream>

int main () {
  std::tr1::array<int, 5>  a = {{ 1,2,3,4,5 }};
  std::cout << a[3] << std::endl;
}

Hat jemand eine Idee? LG