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Added gc-sections. Now unused functions are being garbage collected.

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This commit is contained in:
Piotr Esden-Tempski 2010-12-27 21:30:12 +01:00
parent 81045ff279
commit 600d8c3458
2 changed files with 8 additions and 5 deletions
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10
examples/Makefile.include
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@ -26,11 +26,11 @@ OBJDUMP = $(PREFIX)-objdump
# Uncomment this line if you want to use the installed (not local) library. # Uncomment this line if you want to use the installed (not local) library.
# TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX) # TOOLCHAIN_DIR = `dirname \`which $(CC)\``/../$(PREFIX)
TOOLCHAIN_DIR = ../../.. TOOLCHAIN_DIR = ../../..
CFLAGS = -O0 -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \ CFLAGS += -Os -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include -fno-common \
-mcpu=cortex-m3 -mthumb -mcpu=cortex-m3 -mthumb
LDSCRIPT = $(BINARY).ld LDSCRIPT = $(BINARY).ld
LDFLAGS = -L$(TOOLCHAIN_DIR)/lib -T$(LDSCRIPT) -nostartfiles LDFLAGS += -L$(TOOLCHAIN_DIR)/lib -T$(LDSCRIPT) -nostartfiles \
#LDFLAGS = -T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections
OBJS += $(BINARY).o OBJS += $(BINARY).o
OOCD ?= openocd OOCD ?= openocd
@ -41,6 +41,8 @@ OOCD_BOARD ?= olimex_stm32_h103
ifneq ($(V),1) ifneq ($(V),1)
Q := @ Q := @
NULL := 2>/dev/null NULL := 2>/dev/null
else
LDFLAGS += -Wl,--print-gc-sections
endif endif
.SUFFIXES: .elf .bin .hex .srec .list .images .SUFFIXES: .elf .bin .hex .srec .list .images

3
lib/Makefile
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@ -24,7 +24,8 @@ PREFIX ?= arm-elf
CC = $(PREFIX)-gcc CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar AR = $(PREFIX)-ar
CFLAGS = -Os -g -Wall -Wextra -I../include -fno-common \ CFLAGS = -Os -g -Wall -Wextra -I../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes -mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections
# ARFLAGS = rcsv # ARFLAGS = rcsv
ARFLAGS = rcs ARFLAGS = rcs
OBJS = vector.o rcc.o gpio.o usart.o adc.o spi.o flash.o nvic.o \ OBJS = vector.o rcc.o gpio.o usart.o adc.o spi.o flash.o nvic.o \