Generate Makefile.dep at every build.

Normally we used to update it from time to time. Too fragile... better
to generate dependencies at every run and delete them on 'make clean'.

Author: antirez

.gitignore

@@ -27,3 +27,4 @@ deps/lua/src/liblua.a
 .make-*
 .prerequisites
 *.dSYM
+Makefile.dep

src/Makefile

@@ -142,15 +142,12 @@ all: $(REDIS_SERVER_NAME) $(REDIS_SENTINEL_NAME) $(REDIS_CLI_NAME) $(REDIS_BENCH
 	@echo "Hint: It's a good idea to run 'make test' ;)"
 	@echo ""
 
-.PHONY: all
-
-# Deps (use make dep to generate this)
-include Makefile.dep
+Makefile.dep:
+	-$(REDIS_CC) -MM *.c > Makefile.dep 2> /dev/null || true
 
-dep:
-	$(REDIS_CC) -MM *.c > Makefile.dep
+-include Makefile.dep
 
-.PHONY: dep
+.PHONY: all
 
 persist-settings: distclean
 	echo STD=$(STD) >> .make-settings
@@ -211,7 +208,7 @@ $(REDIS_CHECK_AOF_NAME): $(REDIS_CHECK_AOF_OBJ)
 	$(REDIS_CC) -c $<
 
 clean:
-	rm -rf $(REDIS_SERVER_NAME) $(REDIS_SENTINEL_NAME) $(REDIS_CLI_NAME) $(REDIS_BENCHMARK_NAME) $(REDIS_CHECK_RDB_NAME) $(REDIS_CHECK_AOF_NAME) *.o *.gcda *.gcno *.gcov redis.info lcov-html
+	rm -rf $(REDIS_SERVER_NAME) $(REDIS_SENTINEL_NAME) $(REDIS_CLI_NAME) $(REDIS_BENCHMARK_NAME) $(REDIS_CHECK_RDB_NAME) $(REDIS_CHECK_AOF_NAME) *.o *.gcda *.gcno *.gcov redis.info lcov-html Makefile.dep
 
 .PHONY: clean