+# 64-bit addressing support. Currently strictly experimental. DFD 2005-06-06
+if [ "$use64bitall" ]
+then
+case "$osvers" in
+[1-7].*)
+ cat <<EOM >&4
+
+
+
+*** 64-bit addressing is not supported for Mac OS X versions
+*** below 10.4 ("Tiger") or Darwin versions below 8. Please try
+*** again without -D64bitall. (-D64bitint will work, however.)
+
+EOM
+ exit 1
+ ;;
+*)
+ cat <<EOM >&4
+
+
+
+*** Perl 64-bit addressing support is experimental for Mac OS X
+*** 10.4 ("Tiger") and Darwin version 8. System V IPC is disabled
+*** due to problems with the 64-bit versions of msgctl, semctl,
+*** and shmctl. You should also expect the following test failures:
+***
+*** ext/threads/shared/t/wait (threaded builds only)
+
+EOM
+ for var in ccflags cppflags ld ldflags
+ do
+ eval $var="\$${var}\ -arch\ ppc64"
+ done
+
+ [ "$d_msgctl" ] || d_msgctl='undef'
+ [ "$d_semctl" ] || d_semctl='undef'
+ [ "$d_shmctl" ] || d_shmctl='undef'
+ ;;
+esac
+fi
+