The Makefile generated for 3.0.25a (and also 3.0.25) is defective at line 'BIN_PROG = ...'. This line ends with a line continuation ('\') but the next line is blank because @SMBMOUNT_PROGS@ is undefined. Moving @SMBMOUNT_PROGS@ before @EXTRA_BIN_PROGS@ in Makefile.in resolves this problem.
Thanks. Fixed.