Add static checkers to Makefile

Signed-off-by: John Hood <cgull@glup.org>

Makefile.am

@@ -3,6 +3,7 @@ SUBDIRS = src scripts man conf
 EXTRA_DIST = autogen.sh ocb-license.html README.md COPYING.iOS
 nodist_noinst_HEADERS = version.h
 BUILT_SOURCES = version.h
+CLANG_SCAN_BUILD = scan-build
 
 .PHONY:	VERSION
 
@@ -21,4 +22,19 @@ version.h:	VERSION
 	@rm -f version.h.new
 
 clean-local:
-	@rm -f version.h VERSION
+	@rm -rf version.h VERSION cov-int mosh-coverity.txz
+
+cppcheck: $(BUILT_SOURCES) config.h
+	cppcheck --enable=all --template=gcc -include config.h -I . \
+		-I src/crypto -I src/frontend -I src/network -I src/protobufs \
+		-I src/statesync -I src/terminal -I src/util \
+		-I /usr/include -I /usr/include/google/protobuf -I/usr/include/openssl \
+		.
+
+cov-build: $(BUILT_SOURCES) config.h
+	$(MAKE) clean && rm -rf cov-int && \
+		cov-build --dir cov-int $(MAKE) && \
+		tar -caf mosh-coverity.txz cov-int
+
+scan-build: $(BUILT_SOURCES) config.h
+	$(MAKE) clean && $(CLANG_SCAN_BUILD) $(MAKE)