rules to build documentation using 'make doc'

[[Imported from SVN: r5784]]

am/documentation

+# -*- Makefile -*-
+# $Id: global-rules 5267 2008-09-10 10:45:42Z christi $
+
+maintainer-clean-local: doc-clean
+
+doc-am: doc-local
+
+doc-local:
+
+doc-clean:
+	rm -f $(DOCFILES)
+
+doc: doc-recursive
+
+doc-recursive:
+	@set fnord $$MAKEFLAGS; amf=$$2; \
+	dot_seen=no; \
+	target=`echo $@ | sed s/-recursive//`; \
+	list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  echo "Making $$target in $(subdir)/$$subdir"; \
+	  if test "$$subdir" = "."; then \
+	    dot_seen=yes; \
+	    local_target="$$target-am"; \
+	  else \
+	    local_target="$$target"; \
+	  fi; \
+	  (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) $$local_target) \
+	   || case "$$amf" in *=*) exit 1;; *k*) fail=yes;; *) exit 1;; esac; \
+	done; \
+	if test "$$dot_seen" = "no"; then \
+	  $(MAKE) $(AM_MAKEFLAGS) "$$target-am" || exit 1; \
+	fi; test -z "$$fail"
+

am/global-rules

@@ -14,3 +14,6 @@ include $(top_srcdir)/am/headercheck
 
 # add "check-log"-target to create automated build logs
 include $(top_srcdir)/am/checklog
+
+# add "doc"-target to create and clean documentation
+include $(top_srcdir)/am/documentation