Our sub-projects (Ncat, Nping, Zenmap, Ndiff, and nmap-update) and included libraries (libpcap, libpcre, liblua, libnetutil, nbase, nsock, libdnet-stripped) use different spellings and arrangement of directives, variables, and dependencies, but really all do nearly the same thing. Example:

all: @LUA_BUILD@ @LIBLINEAR_BUILD@ @PCAP_BUILD@ @PCRE_BUILD@ @DNET_BUILD@ @NBASE_BUILD@ @NSOCK_BUILD@ @NCAT_BUILD@ @NMAP_UPDATE_BUILD@ netutil_build
  $(MAKE) $(TARGET) $(BUILDZENMAP) $(BUILDNDIFF) $(BUILDNPING)

In this example, why does libnetutil not use an AC_SUBST expansion, but nbase does? Why do Ncat and nmap-update use AC_SUBST expansions and not a Makefile variable like $(BUILDNCAT)? Later in the file, why is it ncat_build but build-nping?

The targets are also interspersed: sometimes the clean-* targets are all together, other times it's grouped by project name.