--- /dev/null
+#==================================================================================
+# Copyright (c) 2020 Nokia
+# Copyright (c) 2020 AT&T Intellectual Property.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#==================================================================================
+
+# common make meta rules and vars for all subdirectories
+
+XPATH=XFM_PATH=.:/usr/local/share/xfm TFM_PATH=.:/usr/local/share/xfm
+
+# use care: the output type is used to source the macros based on the type
+# of output being rendered.
+# Two pass builds allow for table of contents gen/insert, forward var
+# references etc.
+#
+%.ps: %.xfm
+ $(XPATH) OUTPUT_TYPE=generic_ps XFM_PASS=1 pfm $< /dev/null
+ $(XPATH) OUTPUT_TYPE=generic_ps XFM_PASS=2 pfm $< $@
+
+%.md: %.xfm
+ $(XPATH) OUTPUT_TYPE=markdown XFM_PASS=1 tfm $< /dev/null
+ $(XPATH) OUTPUT_TYPE=markdown XFM_PASS=2 tfm $< | sed 's/^ //' >$@
+
+%.rst: %.xfm
+ $(XPATH) OUTPUT_TYPE=rst XFM_PASS=1 tfm $< /dev/null
+ $(XPATH) OUTPUT_TYPE=rst XFM_PASS=2 tfm $< | sed 's/^ //; s/ *$$//' >$@
+
+%.txt: %.xfm
+ $(XPATH) OUTPUT_TYPE=txt XFM_PASS=1 tfm $< /dev/null
+ $(XPATH) OUTPUT_TYPE=txt XFM_PASS=2 tfm $< $@