Office development kit (odk) - implements the first step on the way to the LibreOffice SDK tarball.
Part of the SDK; to build you need to add --enable-odk.
The easiest way on Linux and macOS is to run make odk.subsequentcheck
The way that also works on Windows is to go to instdir/sdk (don't try directly in odk/)
See https://api.libreoffice.org/docs/install.html how to set up the SDK.
In a shell set up for SDK development, build (calling make) and test (following the instructions given at the end of each make invocation) each of the SDK's examples/ sub-directories.
An example script to build (though not test) the various examples in batch mode is
find examples \( -type d -name nativelib -prune \) -o \ \( -name Makefile -a -print -a \( -execdir make \; -o -quit \) \)
(Note that one of the example extensions asks you to accept an example license on stdin during deployment.)