string_t.c uses the function iswblank, which doesn't seem to exist on Solaris 8 I tried to compile it on. (Compilation is likely broken on other non-Linux platforms as well for the same reason.) Since nothing seems to be using the routines from string_t, I solved the problem by removing string_t.o from Makefile.
If portability is still desired for Wget, it would IMHO be a good idea to completely remove the dependency on wide characters.
