This tool is used to dump contents of an MBDB backup.
Just type make :)
Or, for an out-of-tree build:
mkdir build
cd build
make -f ../Makefile
You will need GNU make for this, and this tool depends on OpenSSL.
make install will install everything to /usr/local. You can specify the
prefix with make PREFIX=/usr install.
Take a look at the man page here.