chore: clean up makefiles a bit

lsm/Makefile

@@ -97,6 +97,20 @@ lint:
 fmt:
 	clang-format -i $(SRCS) $(SRCS_H) $(SRCS_H_INTERNAL) $(SRCS_EXAMPLE)
 
+.PHONY: check
+check:
+	mkdir -p $(BUILD_DIR)/cppcheck
+	cppcheck \
+		$(addprefix -I,$(INC_DIRS)) \
+		--cppcheck-build-dir=$(BUILD_DIR)/cppcheck \
+		--error-exitcode=1 \
+		--enable=warning,style \
+		--inline-suppr \
+		--check-level=exhaustive \
+		--quiet \
+		-j$(shell nproc) \
+		$(SRCS)
+
 .PHONY: clean
 clean:
 	rm -rf $(BUILD_DIR)