The instructions in the README and INSTALL files for Linux specify that the first step is to run the configure script. However, this script is not in the repository, only configure.ac is present. Code and documentation should be made consistent, either by including the configure script or by specifying how to run autoconf in order to generate it from configure.ac.
configure, as a generated script, has no place in the repository. It will be present in released tarballs. And that is what README is targetted on. People who use git checkouts are expected to be capable (and willing) to spend some time figuring things out (e.g., by searching online for resources, like https://sourceforge.net/p/libwpd/wiki/librevenge/).
On second thought. I have decided to add mention of autogen.sh to README. This is the least problem with the README, though. Most of the content is misleading or obsolete now, so I basically have to rewrite it for both librevenge and libwpd.