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-rw-r--r--arduino-mk/Arduino.mk8
1 files changed, 4 insertions, 4 deletions
diff --git a/arduino-mk/Arduino.mk b/arduino-mk/Arduino.mk
index 9a85222..8fc8e5c 100644
--- a/arduino-mk/Arduino.mk
+++ b/arduino-mk/Arduino.mk
@@ -652,10 +652,10 @@ CPPFLAGS += -mmcu=$(MCU) -DF_CPU=$(F_CPU) -DARDUINO=$(ARDUINO_VERSION) \
-I. -I$(ARDUINO_CORE_PATH) -I$(ARDUINO_VAR_PATH)/$(VARIANT) \
$(SYS_INCLUDES) $(USER_INCLUDES) -g -Os -w -Wall \
-ffunction-sections -fdata-sections
-CFLAGS = -std=gnu99
-CXXFLAGS = -fno-exceptions
-ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp
-LDFLAGS = -mmcu=$(MCU) -Wl,--gc-sections -Os
+CFLAGS += -std=gnu99
+CXXFLAGS += -fno-exceptions
+ASFLAGS += -mmcu=$(MCU) -I. -x assembler-with-cpp
+LDFLAGS += -mmcu=$(MCU) -Wl,--gc-sections -Os
SIZEFLAGS ?= --mcu=$(MCU) -C
# Expand and pick the first port