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RIOT-OS/RIOT
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RIOT/makefiles/arch/avr8.inc.mk

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makefiles: add atmega arch generic makefile
2018-05-14 19:25:21 +02:00
# Target architecture for the build. Use avr if you are unsure.
build system: Overwrite TARGET_ARCH per arch Add `TARGET_ARCH_<ARCH>` for each architecture (e.g. `TARGET_ARCH_CORTEX` for Cortex M) to allow users to overwrite the target triple for a specific arch from ~/.profile or ~/.bashrc (or the like) without overwriting it for all others as well.
2020-09-08 22:28:41 +02:00
TARGET_ARCH_AVR ?= avr
TARGET_ARCH ?= $(TARGET_ARCH_AVR)
makefiles: add atmega arch generic makefile
2018-05-14 19:25:21 +02:00
makefiles/arch/avr8: Add xmega linker conditions The current script doesn't allow change script path and name. Add LDSCRIPT_COMPAT_PATH and LDSCRIPT_COMPAT_NAME default values to allow a unique path inside atxmega folder. Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
2021-01-02 19:29:08 +01:00
ifeq (atxmega,$(CPU))
ifeq (,$(CPU_MODEL))
$(error CPU_MODEL must have been defined by the board Makefile.features)
endif
CFLAGS_CPU ?= -mmcu=$(CPU_MODEL) $(CFLAGS_FPU)
else
CFLAGS_CPU ?= -mmcu=$(CPU) $(CFLAGS_FPU)
endif
makefiles: add atmega arch generic makefile
2018-05-14 19:25:21 +02:00
CFLAGS_LINK = -ffunction-sections -fdata-sections -fno-builtin -fshort-enums
CFLAGS_DBG ?= -ggdb -g3
CFLAGS_OPT ?= -Os
build system: use -std=gnu11 for avr8 This allows using the __flash qualifier to store data into flash.
2022-05-30 18:22:02 +02:00
# Use of __flash requires gnu11 instead of c11
CFLAGS += -std=gnu11
makefiles: add atmega arch generic makefile
2018-05-14 19:25:21 +02:00
CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
ASFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG)
atmega_common: add arch specific XFA ldscript to properly place .roxfa
2018-05-09 07:52:32 +02:00
makefiles: add atmega arch generic makefile
2018-05-14 19:25:21 +02:00
LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -static -lgcc -e reset_handler -Wl,--gc-sections
cpu/avr8_common: Fix link with binutils > 2.35.2 The xfa.ld script is incompatible with binutils > 2.35.2 and results in firmwares that wont boot. Sadly, I couldn't figure out an elegant way to fix the issue. Instead, I modified the linker script provided by binutils to also include XFA.
2021-08-31 14:42:09 +02:00
LINKFLAGS += -L$(RIOTCPU)/avr8_common/ldscripts
LINKFLAGS += -T$(LINKER_SCRIPT)
makefiles: add atmega arch generic makefile
2018-05-14 19:25:21 +02:00
# 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)
cpu/atxmega: Add external bus interface Introduce XMEGA EBI driver. This enable EBI for use with all memory supported by the device and peripherals. It include support to SRAM, SDRAM, LCDs or any other external bus access. Note: This feature only works for A1/A1U series, which are, the series with EBI hardware. Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
2021-01-23 22:19:29 +01:00
LINKFLAGS += $(LDSCRIPT_EXTRA)
makefiles: add atmega arch generic makefile
2018-05-14 19:25:21 +02:00
ifeq ($(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
cpu/arch: blacklist incompatible CFLAGS Blacklist incompatible CFLAGS that are currently "optionally" included in 'cflags.inc.mk'. This prepares for the migration to 'OPTIONAL_CFLAGS'.
2019-08-28 19:43:17 +02:00
OPTIONAL_CFLAGS_BLACKLIST += -Wformat-overflow
OPTIONAL_CFLAGS_BLACKLIST += -Wformat-truncation
toolchain/cflags: enable dwarf compression. Use the -gz option to compress ELF sections containing DWARF information. This saves around 50% of disk space, without any side effects. See https://gcc.gnu.org/onlinedocs/gcc-9.2.0/gcc/Debugging-Options.html#Debugging-Options for more infomation on this option. Some platforms have an outdated toolchain that does not support -gz so the flag is blacklisted there. Even then, the results are quite impressive. I used @cladmi's `buildtest` branch (https://github.com/cladmi/RIOT/tree/wip/du/buildtest) with this change and compiled the `examples/default` application: ``` $ BUILD_IN_DOCKER=1 DOCKER="sudo docker" make -C examples/default buildtest-indocker ``` The size was obtained with: ``` $ find output -name "*.bin.bindirsize" -type f -exec tail -n1 '{}' \; | cut -f 1 | awk '{s+=$1} END {printf "%.0f", s}' ``` Results: - Vanilla: 10328112 KB (~10GB). - with -gz: 4982788 KB (~5GB). This was inspired by #8496.
2019-08-28 18:40:38 +02:00
OPTIONAL_CFLAGS_BLACKLIST += -gz
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