From c1cd7e5155c7dccac60985f2758951199eaf8b74 Mon Sep 17 00:00:00 2001
From: kaasasolut <git@kaasa.com>
Date: Fri, 2 Feb 2018 09:29:55 +0100
Subject: [PATCH] nrf: Only search for frozen files if FROZEN_MPY_DIR is set

---
 ports/nrf/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ports/nrf/Makefile b/ports/nrf/Makefile
index 25076020d4..cffbbefe1b 100644
--- a/ports/nrf/Makefile
+++ b/ports/nrf/Makefile
@@ -206,8 +206,10 @@ SRC_C += \
 	device/$(MCU_VARIANT)/system_$(MCU_SUB_VARIANT).c \
 	device/$(MCU_VARIANT)/startup_$(MCU_SUB_VARIANT).c \
 
+ifneq ($(FROZEN_MPY_DIR),)
 FROZEN_MPY_PY_FILES := $(shell find -L $(FROZEN_MPY_DIR) -type f -name '*.py')
 FROZEN_MPY_MPY_FILES := $(addprefix $(BUILD)/,$(FROZEN_MPY_PY_FILES:.py=.mpy))
+endif
 
 OBJ += $(PY_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_LIB:.c=.o))