Hi, I would like to use the boost regex lib in a c++ program. This is being developed under gnu/linux (Debian-Sarge Kernel 2.4.27) with gcc 3.3.5. Also, we are creating binaries for Win32 by cross compiling with MinGW (i586-mingw32msvc-g++ (GCC) 3.4.2 (mingw-special)). Thus, i have to build the boost::regex library for both gnu/linux and win32. There was no problem to get the linux version (it is included in Debian, and anyway the source succeded to compile), but i'm having trouble to compile the win version. I compile from <boost_root_dir>/boost_1_31_0/libs/regex/build by using generic.mak (make -f generic.mak). in this file i've just added these lines: CXX=i586-mingw32msvc-g++ LINKER=i586-mingw32msvc-ar This is the output i obtain: xxxxx@xxxxx:~/boost/boost_1_31_0/libs/regex/build$ make -f generic.mak i586-mingw32msvc-g++ -o generic/boost_regex/c_regex_traits.o -c -O2 -I../../../ ../src/c_regex_traits.cpp ../src/c_regex_traits.cpp: In static member function `static size_t boost::c_regex_traits<boost::regex_wchar_type>::strnarrow(char*, size_t, const boost::regex_wchar_type*)': ../src/c_regex_traits.cpp:1052: error: `wcstombs' is not a member of `std' make: *** [generic/boost_regex/c_regex_traits.o] Error 1 any clues about what i'm doing wrong? thanks