make dist tries to generate the antlr output, which in turn means that antlr is required.
Index: ChangeLog 2005-11-28 Andrew Cagney <cagney@redhat.com> * Makefile.am (ANTLR): Define. Do not include frysk/expr/Makefile.inc (EXTRA_DIST): Delete frysk/expr/cpp.g and frysk/expr/*.sed. Index: common/ChangeLog 2005-11-28 Andrew Cagney <cagney@redhat.com> * Makefile.gen.sh (GEN_NODIST): Define. (.g): For .g files generate BUILT_SOURCES, GEN_NODIST, CLEANFILES, and rule. Index: frysk/expr/ChangeLog 2005-11-28 Andrew Cagney <cagney@redhat.com> * Makefile.inc: Delete, handled by Makefile.gen.sh.