* Makefile.am (install-exec-hook): Use APIVERSION. * m4/init.m4 (AM_INIT_AUTOMAKE): Use am__api_version. * m4/amversion.in (AM_AUTOMAKE_VERSION): Set am__api_version from APIVERSION. * automake.in (perllibdir): Use APIVERSION. (libdir): Likewise. * aclocal.in (perllibdir): Use APIVERSION. (APIVERSION): New global. (parse_arguments): Use APIVERSION. * configure.in (APIVERSION): New subst. (pkgvdatadir): Use APIVERSION.