build: add support for building tools targeting host machine

Makefile

@@ -45,7 +45,7 @@ LDFLAGS := $(LDFLAGS) -g -Os
 ALL_KERNEL_OBJECT_FILES := $(KERNEL_OBJ) $(ARCH_OBJ) $(LIBC_OBJ)
 ALL_KERNEL_DEPS := $(ALL_KERNEL_OBJECT_FILES:.o=.d)
 
-all: $(BUILD_DIR)/$(KERNEL_EXEC)
+all: $(BUILD_DIR)/$(KERNEL_EXEC) tools
 
 -include $(ALL_KERNEL_DEPS)
 
@@ -69,7 +69,7 @@ clean:
 	@rm -rf $(BUILD_DIR)
 
 $(BUILD_DIR)/compile_commands.json:
-	@$(MAKE) clean
+	@$(MAKE) --no-print-directory clean
 
 	@printf "    \033[1;93mGEN\033[0m    Generating compiler database.\n"
 
@@ -77,8 +77,11 @@ $(BUILD_DIR)/compile_commands.json:
 
 compile-db: $(BUILD_DIR)/compile_commands.json
 
+tools:
+	@$(MAKE) --no-print-directory -C tools
+
 include arch/$(ARCH)/extra.mk
 
-.PHONY: all compile-db
+.PHONY: all tools compile-db
 
 .INTERMEDIATE: $(ARCH_TEMP_FILES)