makefile.conf

# Selecting Core
CORTEX_M=3

# Use newlib-nano. To disable it, specify USE_NANO=
USE_NANO=--specs=nano.specs

# Use seimhosting or not
USE_SEMIHOST=--specs=rdimon.specs -lc -lc -lrdimon
USE_NOHOST=-lm -lc -lnosys

CORE=CM$(CORTEX_M)
BASE=.
ObjDir=obj
BinDir=bin

# Compiler & Linker
CC=arm-none-eabi-gcc
AS=arm-none-eabi-as
LD=arm-none-eabi-ld

# Options for specific architecture
ARCH_FLAGS=-mthumb -mcpu=cortex-m$(CORTEX_M)

# Startup code
STARTUP=$(BASE)/startup/startup_$(SERIES).S
STARTUP_DEFS=-D__STARTUP_CLEAR_BSS -D__START=main

OPTIMIZATION=0
DEBUG=-ggdb2
#LISTING=-ahls

# -Os -flto -ffunction-sections -fdata-sections to compile for code size
CFLAGS=$(ARCH_FLAGS) $(STARTUP_DEFS) -Os -flto -ffunction-sections -fdata-sections -std=c99 -Wall -Wextra -Wstrict-prototypes -Wno-switch -O$(OPTIMIZATION) $(DEBUG)

ASFLAGS=$(LISTING) -mcpu=cortex-m$(CORTEX_M)

LDSCRIPTS=-L. -L$(BASE)/ldscripts -T mem_$(DEVICE).ld -T sections-nokeep.ld
LFLAGS=$(USE_NANO) $(USE_NOHOST) $(LDSCRIPTS) $(GC) $(MAP)
#LDFLAGS=$(ARCH_FLAGS) -O$(OPTIMIZATION) -nostartfiles -Wl,-Map=$(BinDir)/$(PROJECT).map -T$(LSCRIPT)

# Link for code size
GC=-Wl,--gc-sections

# Create map file
MAP=-Wl,-Map=$(BinDir)/$(PROJECT).map