Here are some very general suggestions based on what works for me
on Solaris (I haven't built on AIX), which you may or may not have
already followed:

If you've already built Apache and have it working, so that you are
sure your problems are specific to JServ, then you'll probably want to
skip steps 1-3, just go to 4:

  Step 1: Build and install Gnu 'make', then modify your PATH so that
          you hit that before you hit whatever the system 'make' is.

  Step 2: Build and install Gcc 2.8.1, then modify your PATH
          accordingly.

  Step 3: Build and install Apache by itself, make sure it works.

  Step 4: Add in JServ, re-build and re-install Apache, deal with
          configuration issues.  Follow the steps that Ari wrote:

             http://www.magiccookie.com/computers/apache-jserv/

If you skipped steps 1-3 because you already had Apache working, but
step 4 doesn't help you out, then if you aren't using Gnu make and Gcc,
I'd seriously consider going through steps 1-3 anyways.  After that,
I'm out of ideas.  You'll have to grovel around in the various Apache
and JServ Makefiles and Configuration.tmpl files to figure out where 
that .lib is coming from.

====================================================
= Reid M. Pinchback                                =
= I/T Delivery, MIT                                =
=                                                  =
= Email:   reidmp@mit.edu                          =
= URL:     http://mit.edu/reidmp/www/home.html     =
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= Respect your own privacy; boycott Pentium III    =
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