$ wkhtmltopdf --version
wkhtmltopdf 0.12.3-dev-79ff51e (with patched qt)
$ wkhtmltopdf --print-media-type --orientation Portrait --header-html ./header.html --footer-html ./footer.html body.html out.pdf
then
Loading pages (1/6)
Counting pages (2/6)
Resolving links (4/6)