Can anyone explain this? I can't see where KDE_CHECK_MPEGLIB is defined, and it ends up verbatim inside configure which is of course incorrect. from mpeglib_artsplug/configure.in.in: AC_DEFUN(KDE_CHECK_MPEGLIB_FOR_ARTS, [ AC_REQUIRE([KDE_MPEGLIB_COMPILES]) ]) KDE_CHECK_MPEGLIB -- George Staikos