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cpu/atmega*: make use of common atmega.inc.mk and remove redundancies

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Everything is now defined in atmega.inc.mk, following the common
RIOT-like reusability of rules and variables (e.g. cortexm.inc.mk).
This commit is contained in:
Francisco Acosta 2018-05-15 00:21:09 +02:00 committed by kYc0o
parent 6bbf372d7d
commit 2bdcdddd76
3 changed files with 4 additions and 39 deletions
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2
cpu/atmega256rfr2/periph/Makefile
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@ -1 +1 @@
include $(RIOTBASE)/Makefile.base
include $(RIOTMAKE)/periph.mk

2
cpu/atmega328p/Makefile.include
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@ -5,4 +5,4 @@ RAM_LEN = 2K
ROM_LEN = 32K
# CPU depends on the atmega common module, so include it
include $(RIOTCPU)/atmega_common/Makefile.include
include $(RIOTCPU)/atmega_common/Makefile.include

39
cpu/atmega_common/Makefile.include
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@ -1,44 +1,9 @@
# Target architecture for the build. Use avr if you are unsure.
export TARGET_ARCH ?= avr
export CFLAGS_CPU = -mmcu=$(CPU) $(CFLAGS_FPU)
export CFLAGS_LINK = -ffunction-sections -fdata-sections -fno-builtin -fshort-enums
export CFLAGS_DBG ?= -ggdb -g3
export CFLAGS_OPT ?= -Os
export CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
export ASFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG)
LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -static -lgcc -e reset_handler -Wl,--gc-sections
# export the peripheral drivers to be linked into the final binary
export USEMODULE += atmega_common_periph
export USEMODULE += periph_common
# the atmel port uses stdio_uart
export USEMODULE += stdio_uart
# include module specific includes
export INCLUDES += -I$(RIOTCPU)/atmega_common/include \
-isystem$(RIOTCPU)/atmega_common/avr_libc_extra/include \
-isystem$(RIOTCPU)/atmega_common/avr_libc_extra/include/vendor
ifeq ($(LTO),1)
# avr-gcc <4.8.3 has a bug when using LTO which causes a warning to be printed always:
# '_vector_25' appears to be a misspelled signal handler [enabled by default]
# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59396
LINKFLAGS += -Wno-error
endif
# Use ROM_LEN and RAM_LEN during link
$(if $(ROM_LEN),,$(error ROM_LEN is not defined))
$(if $(RAM_LEN),,$(error RAM_LEN is not defined))
LINKFLAGS += $(LINKFLAGPREFIX)--defsym=__TEXT_REGION_LENGTH__=$(ROM_LEN)$(if $(ROM_RESERVED),-$(ROM_RESERVED))
LINKFLAGS += $(LINKFLAGPREFIX)--defsym=__DATA_REGION_LENGTH__=$(RAM_LEN)
# Use newer linker script to have ROM/RAM configuration symbols in binutils<2.26
LDSCRIPT_COMPAT = $(if $(shell $(TARGET_ARCH)-ld --verbose | grep __TEXT_REGION_LENGTH__),,\
-T$(RIOTCPU)/$(CPU)/ldscripts_compat/avr_2.26.ld)
LINKFLAGS += $(LDSCRIPT_COMPAT)
# avr libc needs some RIOT-specific support code
USEMODULE += avr_libc_extra
include $(RIOTMAKE)/arch/atmega.inc.mk