There is no Makefile in the dir aolserver3_0, I presume that there should be??.
The contents are; bin,log,modules,nsd.tcl,servers.
Can't find a Makefile in any of the directories either?
I did try a more recent version of aolserver (3_2), which is the current release. It did have a Makefile.global file in one of it's directories but when I tried a "gmake Makefile.global" on this, it came back as "gmake: nothing to do to Makefile.global".