RIOT/makefiles/arch/msp430.inc.mk

# Target architecture for the build. Use msp430 if you are unsure.
export TARGET_ARCH ?= msp430

# define build specific options
CFLAGS_CPU   = -mmcu=$(CPU_MODEL)
# default std set to gnu99 of not overwritten by user
ifeq (, $(filter -std=%, $(CFLAGS)))
  CFLAGS += -std=gnu99
endif
CFLAGS_LINK  = -ffunction-sections -fdata-sections
CFLAGS_DBG  ?= -gdwarf-2
CFLAGS_OPT  ?= -Os
CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
ASFLAGS += $(CFLAGS_CPU) --defsym $(CPU_MODEL)=1 $(CFLAGS_DBG)
# export linker flags
export LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -Wl,--gc-sections -static -lgcc

OPTIONAL_CFLAGS_BLACKLIST += -fdiagnostics-color
OPTIONAL_CFLAGS_BLACKLIST += -Wformat-overflow
OPTIONAL_CFLAGS_BLACKLIST += -Wformat-truncation
OPTIONAL_CFLAGS_BLACKLIST += -gz
msp430: Set TARGET_ARCH for msp430 targets 2016-03-21 12:19:04 +01:00			`# Target architecture for the build. Use msp430 if you are unsure.`
			`export TARGET_ARCH ?= msp430`
boards: added shared Makefile.inc for msp430 boards 2015-09-16 17:06:08 +02:00
			`# define build specific options`
cpu/msp430: use gnu99 by default 2018-07-11 14:56:54 +02:00			`CFLAGS_CPU = -mmcu=$(CPU_MODEL)`
			`# default std set to gnu99 of not overwritten by user`
			`ifeq (, $(filter -std=%, $(CFLAGS)))`
makefiles: do not locally export compilation variables These are already exported by `makefiles/vars.inc.mk`. It is a prerequisite to allow handling compilation without global exports. 2019-08-27 16:06:41 +02:00			`CFLAGS += -std=gnu99`
cpu/msp430: use gnu99 by default 2018-07-11 14:56:54 +02:00			`endif`
boards: msp430-common: remove dead code when linking. 2016-07-31 00:17:55 +02:00			`CFLAGS_LINK = -ffunction-sections -fdata-sections`
cpu: make CFLAGS_DBG configurable 2017-01-16 15:54:59 +01:00			`CFLAGS_DBG ?= -gdwarf-2`
boards: added shared Makefile.inc for msp430 boards 2015-09-16 17:06:08 +02:00			`CFLAGS_OPT ?= -Os`
makefiles: do not locally export compilation variables These are already exported by `makefiles/vars.inc.mk`. It is a prerequisite to allow handling compilation without global exports. 2019-08-27 16:06:41 +02:00			`CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)`
			`ASFLAGS += $(CFLAGS_CPU) --defsym $(CPU_MODEL)=1 $(CFLAGS_DBG)`
boards: added shared Makefile.inc for msp430 boards 2015-09-16 17:06:08 +02:00			`# export linker flags`
boards: msp430-common: remove dead code when linking. 2016-07-31 00:17:55 +02:00			`export LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -Wl,--gc-sections -static -lgcc`
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 += -fdiagnostics-color`
			`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`