Hi, I have found the error, in case somebody stumbles across the same problems: First, I called AC_CONFIG_SUBDIRS after AC_OUTPUT. This is of course wrong. But it is clearly stated in the autoconf info file, so to this mistake applies 'RTFM' :-) The other mistake I did, however, is much more subtle, and the info file is misleading there. It states: Macro: AC_CONFIG_SUBDIRS (DIR ...) and so I wrote AC_CONFIG_SUBDIRS (kbiblio/btparse), which does not work. The space between the macro and the '(' must not be there. If I write AC_CONFIG_SUBDIRS(kbiblio/btparse) instead, everything works fine. Best, Claus -- Claus Wilke claus.wilke@gmx.net