* m4/init.m4 (AM_INIT_AUTOMAKE): Add `_AM_DEPENDENCIES(OBJC)' to `AC_PROG_OBJC' if provided, to fix Objective C depmode handling. * lib/Automake/Variable.pm (%_ac_macro_for_var): Add entries for OBJC and OBJCFLAGS. * tests/ext.test: Adjust. * tests/objc.test, tests/objc2.test: New tests. * tests/Makefile.am: Adjust. * doc/automake.texi (Objective C Support): New node. (Support for Other Languages): Adjust. * NEWS: Update.