To compile smtpclient
  make UDNS_DIR=[path to udns package dir]
  make install

Note-1: the udns package must be extracted and compiled before
you can compile smtpclient. The UDNS_DIR must be set to the PATH
where the udbs package was built, for example:
  make UDNS_DIR=../udns

Note: the toolchain must be present in the parent directory, in a
sub-directory named gcc-3.4.2, and the tuple for the toochain
must be mips-linux-uclibc. That is, the cross-gcc must be
accessible as:
  ../gcc-3.4.2/bin/mips-linux-uclibc-gcc
