make doc will build all of the above, except for CHM,
which needs manual preparation and can be built with
make doc-chm. See doc/scripts/README.rst for details.

We do our best to ensure to detect the required tools
before adding targets, so a build should always succeed.

Exception: On Debian and Ubuntu, the following packages are
required to build the PDF target (in addition to pdflatex
itself, which is autodetected):

* texlive-latex-recommended
* texlive-latex-extra
* texlive-fonts-recommended

If pdflatex is present, but those are not, the doc target
will fail.

Results can be found in $BUILDDIR/doc/$format.