FreeBSD GTK, GTK2, wxWindows-2.4.1 when a do $./configure --with-gtk --enable-gtk2 --enable-unicode config.log is: .............................. configure:17079: c++ -c -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/X11R6/include/pango-1.0 -I/usr/X11R6/include -I/usr/local/include/freetype2 -I/usr/local/include -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES conftest.C 1>&5 configure: In function `int main()': configure:17075: `_vsnwprintf' undeclared (first use this function) configure:17075: (Each undeclared identifier is reported only once configure:17075: for each function it appears in.) configure: failed program was: #line 17072 "configure" #include "confdefs.h" #include <wchar.h> int main() { &_vsnwprintf; ; return 0; } ....................... when I try to compile, error is occured (something about wchar) I checked my PATH and LD_LIBRARY_PATH variables (OK). Without unicode wx comiles OK. with unicode I don't know what to do.