This almost ties in with the previous post about old versions of autoconf(!) In recent autoconf >= 2.64, I can use AC_INIT to define a PACKAGE_URL. As some of our systems only have 2.61, I thought I would # This becomes part of AC_INIT in autoconf 2.64 PACKAGE_URL="http://www.inference.phy.cam.ac.uk/dasher/" AC_DEFINE_UNQUOTED([PACKAGE_URL], ["$PACKAGE_URL"], [Define to the home page for this package.]) AC_SUBST([PACKAGE_URL]) but now I see that with e.g. autoconf 2.65, the fact that I only use an AC_INIT with 4 arguments means that PACKAGE_URL is defined to "", so my definition redefines PACKAGE_URL and then autoconf tests are unhappy because cpp will complain about two PACKAGE_URL variables... What is the best thing to do? Cheers, Patrick _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf