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-rw-r--r--rules.mk9
1 files changed, 6 insertions, 3 deletions
diff --git a/rules.mk b/rules.mk
index 3d32adc5f3..9143f9bcff 100644
--- a/rules.mk
+++ b/rules.mk
@@ -230,6 +230,8 @@ LDFLAGS += $(EXTMEMOPTS)
LDFLAGS += $(patsubst %,-L%,$(EXTRALIBDIRS))
LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
#LDFLAGS += -T linker_script.x
+# You can give EXTRALDFLAGS at 'make' command line.
+LDFLAGS += $(EXTRALDFLAGS)
@@ -315,9 +317,10 @@ GENDEPFLAGS = -MMD -MP -MF .dep/$(@F).d
# Combine all necessary flags and optional flags.
# Add target processor to flags.
-ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
-ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS)
-ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
+# You can give extra flags at 'make' command line like: make EXTRAFLAGS=-DFOO=bar
+ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS) $(EXTRAFLAGS)
+ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS) $(EXTRAFLAGS)
+ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS) $(EXTRAFLAGS)