--- /dev/null
+include ../upgradeable_versions.mk
+
+EXTENSION = postgis_sfcgal
+EXTVERSION = @POSTGIS_LIB_VERSION@
+MINORVERSION = @POSTGIS_MAJOR_VERSION@.@POSTGIS_MINOR_VERSION@
+GREP = @GREP@
+
+MICRO_NUMBER = $(shell echo $(EXTVERSION) | sed "s/[0-9]\.[0-9]\.\([0-9]*\)[a-zA-Z]*[0-9]*/\1/")
+PREREL_NUMBER = $(shell echo $(EXTVERSION) | \
+ sed "s/[0-9]\.[0-9]\.\(.*\)/\1/" | \
+ $(GREP) "[a-zA-Z]" | \
+ sed "s/[0-9][a-zA-Z]\([0-9]*\)[a-zA-Z]*/\1/")
+MICRO_PREV = $(shell if test "$(MICRO_NUMBER)x" != "x"; then expr $(MICRO_NUMBER) - 1; fi)
+PREREL_PREV = $(shell if test "$(PREREL_NUMBER)x" != "x"; then expr $(PREREL_NUMBER) - 1; fi)
+
+PREREL_PREFIX = $(shell echo $(EXTVERSION) | \
+ sed "s/[0-9]\.[0-9]\.\(.*\)/\1/" | \
+ $(GREP) "[a-zA-Z]" | \
+ sed "s/\([0-9][a-zA-Z]*\)[0-9]*/\1/")
+
+DATA = $(filter-out $(wildcard sql/*--*.sql),$(wildcard sql/*.sql))
+
+PG_CONFIG = @PG_CONFIG@
+
+PG91 = $(shell $(PG_CONFIG) --version | $(GREP) -qE " 8\.| 9\.0" && echo no || echo yes)
+SQL_BITS = $(wildcard sql_bits/*.sql)
+EXTRA_CLEAN += sql/*.sql ${SQL_BITS}
+
+
+ifeq ($(PG91),yes)
+all: sql/$(EXTENSION)--$(EXTVERSION).sql sql/$(EXTENSION)--unpackaged--$(EXTVERSION).sql sql/$(EXTENSION)--$(EXTVERSION)--$(EXTVERSION)next.sql sql/$(EXTENSION)--$(EXTVERSION)next--$(EXTVERSION).sql sql_minor_upgrade
+
+sql/$(EXTENSION)--$(EXTVERSION).sql: sql/$(EXTENSION).sql
+ mkdir -p sql
+ cp $< $@
+
+sql/$(EXTENSION).sql: sql_bits/sfcgal.sql sql_bits/sfcgal_comments.sql
+ mkdir -p sql
+ cat $^ > $@
+
+#this is a cludge to allow upgrading from same SVN to same SVN
+sql/$(EXTENSION)--$(EXTVERSION)--$(EXTVERSION)next.sql: ../postgis_extension_helper.sql sql_bits/sfcgal_upgrade_minor.sql sql_bits/sfcgal_comments.sql ../postgis_extension_helper_uninstall.sql
+ mkdir -p sql
+ cat $^ > $@
+sql/$(EXTENSION)--$(EXTVERSION)next--$(EXTVERSION).sql: sql/$(EXTENSION)--$(EXTVERSION)--$(EXTVERSION)next.sql
+ mkdir -p sql
+ cp $< $@
+
+sql_bits/sfcgal.sql: ../../postgis/sfcgal.sql
+ mkdir -p sql_bits
+ sed -e 's/BEGIN;//g' -e 's/COMMIT;//g' $< > $@
+
+../../doc/sfcgal_comments.sql:
+ $(MAKE) -C ../../doc comments
+
+sql_bits/sfcgal_comments.sql: ../../doc/sfcgal_comments.sql
+ mkdir -p sql_bits
+ cp $< $@
+
+#grep all lines that start with CREATE OR REPLACE FUNCTION, TRIGGER...
+#then replace CREATE OR REPLACE .. with ALTER EXTENSION..;
+#then remove default values and extra junk
+sql/$(EXTENSION)--unpackaged--$(EXTVERSION).sql: sql_bits/sfcgal.sql ../../utils/create_unpackaged.pl
+ mkdir -p sql
+ cat $< | ../../utils/create_unpackaged.pl postgis_topology > $@
+
+sql_bits/sfcgal_upgrade.sql : ../../postgis/sfcgal_upgrade.sql
+ mkdir -p sql_bits
+ cp $< $@
+
+sql_bits/sfcgal_upgrade_minor.sql: ../postgis_extension_helper.sql sql_bits/sfcgal_upgrade.sql ../../doc/sfcgal_comments.sql ../postgis_extension_helper_uninstall.sql
+ mkdir -p sql_bits
+ echo '\echo Use "CREATE EXTENSION $(EXTENSION)" to load this file. \quit' > $@
+ cat $^ >> $@
+
+sql_minor_upgrade: sql_bits/sfcgal_upgrade_minor.sql
+ for OLD_VERSION in $(UPGRADEABLE_VERSIONS); do \
+ cat $< > sql/$(EXTENSION)--$$OLD_VERSION--$(EXTVERSION).sql; \
+ done
+
+DATA = $(wildcard sql/*--*.sql)
+EXTRA_CLEAN += sql/$(EXTENSION)--$(EXTVERSION).sql sql/$(EXTENSION)--unpackaged--$(EXTVERSION).sql
+endif
+
+distclean: clean
+ rm Makefile
+
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)