C++ – std::regex — is there some lib that needs to be linked


I get a linker error with the following code:

#include <regex>

int main()
    std::regex rgx("ello");
    return 0;

test.o: In function `basic_regex':
/usr/lib/gcc/i586-redhat-linux/4.4.1/../../../../include/c++/4.4.1/tr1_impl/regex:769: undefined reference to `std::basic_regex<char, std::regex_traits<char> >::_M_compile()'
collect2: ld returned 1 exit status

Best Solution

From gcc-4.4.1/include/c++/4.4.1/tr1_impl/regex

template <...>
class basic_regexp {
       * @brief Compiles a regular expression pattern into a NFA.
       * @todo Implement this function.
      void _M_compile();

I guess it's not ready yet.

UPDATE: current bleeding edge GCC (SVN @153546) doesn't appear to have the implementation yet.

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