C includes as they contain substitutions specific to make.
Worked around by creating sysconf/paths.h which is created from
the Makefile instead of by the configure script.
All documentation is built in obj/doc (resp. doc/ if you do a stand-alone build).
Use `make docs' to make the whole documentation or `make userdocs' resp.
`make progdocs' for user manual resp. developer's guide.