--- /dev/null
+++ Libc/Libc-391/Makefile.obsd_begin
@@ -0,0 +1,24 @@
+# For the OpenBSD auto patching mechanism and compatibility environment
+# setup, original OpenBSD sources a put into a OpenBSD subdirectory.
+# If a file with the same name, but suffix ".patch" is in that directory,
+# that patch will be applied before use.
+#
+# The OBSD* variables are set, and bracketed by .include of Makefile.obsd_begin
+# and Makefile.obsd_end
+#
+# Define (empty) variables so that make doesn't give substitution
+# errors if the included makefiles don't change these:
+
+OBSDMAN1=
+OBSDMAN2=
+OBSDMAN3=
+OBSDMAN4=
+OBSDMAN5=
+OBSDMAN6=
+OBSDMAN7=
+OBSDMAN8=
+OBSDMAN9=
+OBSDMDSRCS=
+OBSDMISRCS=
+OBSDHDRS=
+OBSDSRCS=