Question
sqrtf() from math.h problem
Posted on January 27, 2014 at 18:00
Hi everyboy,
I have a problem (Unresolved inclusion: <math.h>) with using sqrtf() on STM32 board from OLIMEX. I’m using the free tool chain provided by OLIMEX - Eclipse Helios - OpenOCD - YAGARTO here is the Makefile provided by OLIMEX I tried to add libm and libc but then I get a lot of missing references (__aeabi_.....) I tried to copy math.h,reent.h,ieeefp.h and_ansi.h to my lib folder (still undefined reference to `sqrtf'). can somebody tell me where my problem is (or better how to solve it) because I have no idea left.# Makefile for compiling the Getting Started project
#-------------------------------------------------------------------------------
# User-modifiable options
#-------------------------------------------------------------------------------
# Trace level used for compilation
# (can be overriden by adding TRACE_LEVEL=#number to the command-line)
# TRACE_LEVEL_DEBUG 5
# TRACE_LEVEL_INFO 4
# TRACE_LEVEL_WARNING 3
# TRACE_LEVEL_ERROR 2
# TRACE_LEVEL_FATAL 1
# TRACE_LEVEL_NO_TRACE 0
TRACE_LEVEL = 4
# Optimization level
OPTIMIZATION = -O0
# Output file basename
OUTPUT = main
# Output directories
BIN = .
OBJ = obj
# library dirs
LIBRARYSRC = ./lib/src
STARTUPFILE = ./lib/startup_stm32f10x_cl.s
#-------------------------------------------------------------------------------
# Tools
#-------------------------------------------------------------------------------
# Tool suffix when cross-compiling
CROSS_COMPILE = arm-none-eabi-
CC = $(CROSS_COMPILE)gcc
SIZE = $(CROSS_COMPILE)size
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
LD = $(CROSS_COMPILE)ld
AS = $(CROSS_COMPILE)as
#-------------------------------------------------------------------------------
# Files
#-------------------------------------------------------------------------------
# include folders
INCLUDES = -I./
INCLUDES += -I./lib/
INCLUDES += -I./lib/inc/
INCLUDES += -I./lib/inc/../../
# Objects built from C source files
C_OBJECTS = $(OBJ)/main.o
C_OBJECTS += $(OBJ)/system_stm32f10x.o
C_OBJECTS += $(OBJ)/stm32f10x_gpio.o
C_OBJECTS += $(OBJ)/stm32f10x_rcc.o
C_OBJECTS += $(OBJ)/stm32f10x_it.o
# Objects built from Assembly source files
ASM_OBJECTS = $(OBJ)/startup_stm32f10x_cl.o
LINKER_SCRIPT = ./lib/stm32_flash.ld
#LINKER_SCRIPT = ./lib/stm32_ram.ld
# Append OBJ and BIN directories to output filename
OUTPUT := $(BIN)/$(OUTPUT)
#-------------------------------------------------------------------------------
# Rules
#-------------------------------------------------------------------------------
# Flags
CFLAGS = -Wall -fno-common -c -g -mcpu=cortex-m3 -mthumb
CFLAGS += -g $(OPTIMIZATION) $(INCLUDES) -DTRACE_LEVEL=$(TRACE_LEVEL)
ASFLAGS = -g -mapcs-32
LDFLAGS = -g -v -nostartfiles
OBJCOPYFLAGS = -O binary
OBJDUMPFLAGS = -x --syms -S
all: $(BIN) $(OBJ) $(OUTPUT).out
$(BIN) $(OBJ):
mkdir $@
$(OUTPUT).out: $(C_OBJECTS) $(ASM_OBJECTS) $(LINKER_SCRIPT)
@ echo ''..linking''
$(LD) $(LDFLAGS) -Map $(OUTPUT).map -T$(LINKER_SCRIPT) -o $(OUTPUT).out $(C_OBJECTS) $(ASM_OBJECTS) libgcc.a
$(OBJCOPY) $(OBJCOPYFLAGS) $(OUTPUT).out $(OUTPUT).bin
# $(OBJDUMP) $(OBJDUMPFLAGS) $(OUTPUT).out > $(OUTPUT).lss
@ echo ''...completed.''
$(C_OBJECTS): main.c system_stm32f10x.c
@ echo ''.compiling''
$(CC) $(CFLAGS) -o $(OBJ)/main.o main.c
$(CC) $(CFLAGS) -o $(OBJ)/system_stm32f10x.o system_stm32f10x.c
$(CC) $(CFLAGS) -o $(OBJ)/stm32f10x_it.o stm32f10x_it.c
@ echo ''.compiling libraries''
$(CC) $(CFLAGS) -o $(OBJ)/stm32f10x_gpio.o $(LIBRARYSRC)/stm32f10x_gpio.c
$(CC) $(CFLAGS) -o $(OBJ)/stm32f10x_rcc.o $(LIBRARYSRC)/stm32f10x_rcc.c
$(ASM_OBJECTS): $(STARTUPFILE)
@ echo ''.assembling''
$(AS) $(ASFLAGS) -o $(OBJ)/startup_stm32f10x_cl.o $(STARTUPFILE)
clean:
-rm -f $(OBJ)/*.o $(BIN)/*.out $(BIN)/*.bin $(BIN)/*.dmp $(BIN)/*.map $(BIN)/*.lss