AC_PROG_RANLIB
+AC_PROG_LEX
+
dnl Turn on optimization by default. Specifically:
dnl
dnl if the user hasn't specified CFLAGS, then
dnl
dnl Checks for library functions.
dnl
-AC_FUNC_ALLOCA
AC_FUNC_MMAP
AC_FUNC_FSEEKO
AC_CHECK_FUNCS(strptime timegm snprintf vsnprintf vasprintf drand48)
-AC_CHECK_FUNCS(strtoll usleep ftello sigblock sigsetjmp memrchr wcwidth)
+AC_CHECK_FUNCS(strtoll usleep ftello sigblock sigsetjmp memrchr wcwidth mbtowc)
if test x"$ENABLE_OPIE" = xyes; then
AC_LIBOBJ([ftp-opie])