dominic/Arduino-Makefile
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Added LTO flags etc. to provide smaller/faster AVR code.

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Works with 1.6.10 or later; or 1.0.x with avr-gcc toolchain 4.8+
This commit is contained in:
Simon John 2016-09-08 14:49:36 +01:00
parent 7c28446e5e
commit ab261ddd6e
1 changed files with 26 additions and 8 deletions
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32
Arduino.mk
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@ -392,10 +392,6 @@ ifndef OBJDUMP_NAME
OBJDUMP_NAME = avr-objdump OBJDUMP_NAME = avr-objdump
endif endif
ifndef AR_NAME
AR_NAME = avr-ar
endif
ifndef SIZE_NAME ifndef SIZE_NAME
SIZE_NAME = avr-size SIZE_NAME = avr-size
endif endif
@ -1031,16 +1027,32 @@ ifneq ($(CATERINA),)
CPPFLAGS += -DUSB_VID=$(USB_VID) -DUSB_PID=$(USB_PID) CPPFLAGS += -DUSB_VID=$(USB_VID) -DUSB_PID=$(USB_PID)
endif endif
# avr-gcc version that we can do maths on
CC_VERNUM = $(shell $(CC) -dumpversion | sed 's/\.//g')
# moved from above so we can find version-dependant ar
ifndef AR_NAME
ifeq ($(shell expr $(CC_VERNUM) '>' 480), 1)
AR_NAME = avr-gcc-ar
else
AR_NAME = avr-ar
endif
endif
ifndef CFLAGS_STD ifndef CFLAGS_STD
ifeq ($(shell expr $(CC_VERNUM) '>' 480), 1)
CFLAGS_STD = -std=gnu11 -flto -fno-fat-lto-objects
else
CFLAGS_STD = CFLAGS_STD =
endif
$(call show_config_variable,CFLAGS_STD,[DEFAULT]) $(call show_config_variable,CFLAGS_STD,[DEFAULT])
else else
$(call show_config_variable,CFLAGS_STD,[USER]) $(call show_config_variable,CFLAGS_STD,[USER])
endif endif
ifndef CXXFLAGS_STD ifndef CXXFLAGS_STD
ifeq ($(shell expr $(ARDUINO_VERSION) '>' 150), 1) ifeq ($(shell expr $(CC_VERNUM) '>' 480), 1)
CXXFLAGS_STD = -std=gnu++11 -fno-threadsafe-statics CXXFLAGS_STD = -std=gnu++11 -fno-threadsafe-statics -flto
else else
CXXFLAGS_STD = CXXFLAGS_STD =
endif endif
@ -1050,9 +1062,15 @@ else
endif endif
CFLAGS += $(CFLAGS_STD) CFLAGS += $(CFLAGS_STD)
CXXFLAGS += -fno-exceptions $(CXXFLAGS_STD) CXXFLAGS += -fpermissive -fno-exceptions $(CXXFLAGS_STD)
ASFLAGS += -x assembler-with-cpp ASFLAGS += -x assembler-with-cpp
ifeq ($(shell expr $(CC_VERNUM) '>' 480), 1)
ASFLAGS += -flto
endif
LDFLAGS += -$(MCU_FLAG_NAME)=$(MCU) -Wl,--gc-sections -O$(OPTIMIZATION_LEVEL) LDFLAGS += -$(MCU_FLAG_NAME)=$(MCU) -Wl,--gc-sections -O$(OPTIMIZATION_LEVEL)
ifeq ($(shell expr $(CC_VERNUM) '>' 480), 1)
LDFLAGS += -flto -fuse-linker-plugin
endif
SIZEFLAGS ?= --mcu=$(MCU) -C SIZEFLAGS ?= --mcu=$(MCU) -C
# for backwards compatibility, grab ARDUINO_PORT if the user has it set # for backwards compatibility, grab ARDUINO_PORT if the user has it set