After installing the required prerequisite for OpenLDAP installation, I ran into my first error in running the configure script:

…

checking db.h usability… no
checking db.h presence… no
checking for db.h… no
configure: error: BDB/HDB: BerkeleyDB not available

At first, I thought this was just a case of $PATH not set up properly (since /usr/local) in not in the path by default). After setting up the path:

# echo $PATH
/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/BerkeleyDB.3.3:/usr/local/BerkeleyDB.3.3/bin:/usr/local/BerkeleyDB.3.3/include/
#

I still have the error.

I then added the path for the include files in the env

env CPPFLAGS=-I/usr/local/Berkeley/include

Did the configure and…

checking for db.h… yes

That fixed…

Next error…