# I don't know if they affect versions of perl other than 5.000 or
# versions of IRIX other than 4.0.4.
#
-cat <<'EOM'
+cat <<'EOM' >&4
If you have problems, you might have try including
-DSTANDARD_C -cckr
in ccflags.
EOM
+
+case "$usethreads" in
+$define|true|[yY]*)
+ cat >&4 <<EOM
+IRIX `uname -r` does not support POSIX threads.
+You should upgrade to at least IRIX 6.2 with pthread patches.
+EOM
+ exit 1
+ ;;
+esac
+
+case "$use64bits" in
+$define|true|[yY]*)
+ cat >&4 <<EOM
+IRIX `uname -r` does not support 64-bit types.
+You should upgrade to at least IRIX 6.2.
+Cannot continue, aborting.
+EOM
+ exit 1
+esac
+