[Boost-users] regex and std::towlower

I'm attempting to compile against the boost_regex headers on Solaris 2.8, using gcc and STLport. I'm encountering the following compile error: /boost/boost/regex/v4/regex_traits.hpp: In static member function `static boost::regex_wchar_type boost::c_regex_traitsboost::regex_wchar_type::translate(boost::regex_wchar_type, bool)': /export/build/pixie/aegis-build/dev/liberty/common/cpp/utils/boost/boost/regex/v4/regex_traits.hpp:290: error: `towlower' is not a member of `_STL' Any ideas? This appears to be specific to Solaris, as the code base compiles alright on Linux. Appreciate the help. -- Tim.