Makefiles: Add manual and a global doc target

Manual generation is now included in the doc/Makefile. Additionally,
a doc target has been added to the global Makefile.

Author: schuay

Makefile

@@ -1,4 +1,4 @@
-
+.PHONY: doc
 
 all:	build-simavr build-tests build-examples
 
@@ -14,8 +14,12 @@ build-examples: build-simavr
 install:
 	$(MAKE) -C simavr install
 
+doc:
+	$(MAKE) -C doc
+
 clean:
 	$(MAKE) -C simavr clean
 	$(MAKE) -C tests clean
 	$(MAKE) -C examples clean
+	$(MAKE) -C doc clean
 

doc/Makefile

@@ -16,16 +16,23 @@
 #	You should have received a copy of the GNU General Public License
 #	along with simavr.  If not, see <http://www.gnu.org/licenses/>.
 
-# you need Graphviz, ruby and exuberant ctags here. 
-# this is not generated in the normal code build
+# For the callgraph, you need Graphviz, ruby and exuberant ctags.
+# The manual requires latex including additional packages (acronym, graphicx, fancyvrb, ...).
+# This is not generated in the normal code build
 
-all:	simavr_callgraph.pdf
+.PHONY: manual
+
+all:	simavr_callgraph.pdf manual
 
 simavr_callgraph.pdf:
 	ctags -f .tags ../simavr/sim/sim_*.[ch] ../simavr/sim/run_*.[ch] 2>/dev/null && \
 		ruby ./tags_to_dot.rb .tags \
 			../simavr/sim/sim_*.c ../simavr/sim/run_*.c >.tags.dot && \
 				dot -Tpdf .tags.dot -o $@
 
+manual:
+	$(MAKE) -C manual
+
 clean:
 	rm -f .tags*
+	$(MAKE) -C manual clean