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Hi,
I'm not very experienced with GCC and I'm
having trouble linking assembly files into my project. After compiling I run the
object-file in a simulator (Atmel AVRStudio 4.06), and I notice that the
assembly files (*.S) are not included in the source files listing, only the c
files (*.c). I use a Make-file to compile with the following setup:
Makefile:
----------------------------------------------------------------------
# Set output name here
TARGET =
targetfile
# Set all sources here
CSRC =
basic_functions.c interrupt_handlers.c bootloader.c
ASRC = sleep.S
loadapp.S
# Set CPU here
MCU =
atmega162
# Set compilation flags here
CFLAGS =
-Wall -W -O1 -mcall-prologues -mno-tablejump -g
ASFLAGS = -g -x
assembler-with-cpp -Wa,-gstabs -Wall -W
#
---------------------------------------------------------------
# Do not
alter anything below this line unless Guru
#
---------------------------------------------------------------
# Update dependencies
DEPEND_SHELL :=
$(shell \
if [ ! -f ".depend" ]; then \
touch ".depend";
\
make depend; \
echo "created"; \
fi
)
# Set other cflags (generic, not project specific)
CFLAGS2 =
-mmcu=$(MCU)
# Object files are created from asm and C sources
OBJ =
$(CSRC:%.c=%.o) $(ASRC:%.S=%.o)
# If Makefile is altered, project will rebuild.
DEPEND = Makefile
#
Tool names
CC = avr-gcc
OBJCP =
avr-objcopy
RM = rm
ECHO = echo
# Compilation Rules
%.eep : $(TARGET).elf
@$(ECHO) "Creating
Intel-Hex file for EEPROM $@"
@$(OBJCP) -j .eeprom
--set-section-flags=.eeprom="alloc,load" \
--change-section-lma
.eeprom=0 -O ihex $< $@
%.obj : $(TARGET).elf
@$(ECHO) "Creating AVR Object file for AVR
Studio"
@$(OBJCP) -O avrobj $< $@
%.bin : $(TARGET).elf
@$(ECHO) "Creating binary file for ATMEL JTAG
ICE"
@$(OBJCP) -O binary $< $@
%.elf : $(OBJ) $(DEPEND)
@$(ECHO) "Linking objects and libraries
into $(TARGET).elf"
@$(CC) $(CFLAGS) $(CFLAGS2) $(OBJ) $(LIBDIRS)
$(LIBS) -o $(TARGET).elf
avr-size $(TARGET).elf
%.hex :
$(TARGET).elf
@$(ECHO) "Creating Intel-Hex file $@"
@$(OBJCP)
-O ihex $< $@
%.o:%.c $(DEPEND)
@$(ECHO) "Compiling $<"
@$(CC)
$(CFLAGS) $(CFLAGS2) -c $< -o $@
%.o:%.S $(DEPEND)
@$(ECHO) "Assembling $<"
@$(CC)
$(CFLAGS) $(CFLAGS2) -c $< -o $@
all: $(TARGET).hex $(TARGET).eep $(TARGET).obj $(TARGET).elf
depend: force
@$(ECHO) "Updating dependencies"
@$(ECHO) ""
> .depend
$(CC) $(CFLAGS) $(INCLUDEDIRS) -M $(CSRC) $(ASRC)
1>>.depend
clean: force
$(RM) -f *~ *.o
distclean: force
$(RM) -f *~ $(TARGET).elf $(TARGET).hex
$(TARGET).eep $(TARGET).obj *.o .depend
force:
#
# Include dependency files if they exist
#
ifneq
($(wildcard .depend),)
include .depend
endif
--------------------------------------------------------------------------------
<end
Makefile>
My actual trouble is
that the "ASRC" files will not include themselves into the
project.
Is there anything
you can see here or mayby something in general that you can think of that is
helpful when using both .c and .S files in your project? Should the functions
defined in your assembler files be declared in a specific manner that I am
unaware of?
ANY help would be greatly appreciated, and
please forgive a stupid user if these questions are sent to the wrong mail
address or are just plain stupid questions :)
Best regards,
Erling U.
Wiken
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