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Re: [avr-gcc-list] AVRStudio and AVR GCC 3.3
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From: |
Jack Valmadre |
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Subject: |
Re: [avr-gcc-list] AVRStudio and AVR GCC 3.3 |
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Date: |
Thu, 05 Jun 2003 21:00:38 +1000 |
The clock skew bit is fixed. Thanks for that.
In the project folder (c:\code\temp), there is originally gcc.bat, gcc2.bat,
makefile, temp.apr, temp.c. When the project is saved, makefile_sym is
created, and when the "all" target is built, temp.d, temp.lst and temp.o are
created.
Here is what's in the makefile:
# WinAVR Sample makefile written by Eric B. Weddington, et al.
# Released to the Public Domain
# Please read the make user manual!
#
#
# On command line:
# make all = Make software.
# make clean = Clean out built project files.
# make coff = Convert ELF to COFF using objtool.
#
# To rebuild project do "make clean" then "make all".
#
# MCU name
MCU = atmega16
# Output format. (can be srec, ihex)
FORMAT = ihex
# Target file name (without extension).
TARGET = temp
# Optimization level (can be 0, 1, 2, 3, s)
# (Note: 3 is not always the best optimization level. See avr-libc FAQ)
OPT = s
# List C source files here. (C dependencies are automatically generated.)
SRC = $(TARGET).c \
foo.c bar.c
# List Assembler source files here.
# Make them always end in a capital .S. Files ending in a lowercase .s
# will not be considered source files but generated files (assembler
# output from the compiler), and will be deleted upon "make clean"!
# Even though the DOS/Win* filesystem matches both .s and .S the same,
# it will preserve the spelling of the filenames, and gcc itself does
# care about how the name is spelled on its command-line.
ASRC =
# Optional compiler flags.
CFLAGS = -g -O$(OPT) -funsigned-char -funsigned-bitfields -fpack-struct \
-fshort-enums -Wall -Wstrict-prototypes -Wa,-ahlms=$(<:.c=.lst)
# Optional assembler flags.
ASFLAGS = -Wa,-ahlms=$(<:.S=.lst),-gstabs
# Optional linker flags.
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
# Additional libraries
#
# Minimalistic printf version
#LDFLAGS += -Wl,-u,vfprintf -lprintf_min
#
# Floating point printf version (requires -lm below)
LDFLAGS += -Wl,-u,vfprintf -lprintf_flt
#
# -lm = math library
LDFLAGS += -lm
#
---------------------------------------------------------------------------
# Define directories, if needed.
DIRAVR = c:/winavr
DIRAVRBIN = $(DIRAVR)/bin
DIRAVRUTILS = $(DIRAVR)/utils/bin
DIRINC = .
DIRLIB = $(DIRAVR)/avr/lib
# Define programs and commands.
SHELL = sh
CC = avr-gcc
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
REMOVE = rm -f
COPY = cp
ELFCOFF = objtool
HEXSIZE = avr-size --target=$(FORMAT) $(TARGET).hex
ELFSIZE = avr-size -A $(TARGET).elf
FINISH = echo Errors: none
BEGIN = echo -------- begin --------
END = echo -------- end --------
# Define all object files.
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
# Define all listing files.
LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)
# Combine all necessary flags and optional flags. Add target processor to
flags.
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
# Default target.
all: begin gccversion sizebefore $(TARGET).elf $(TARGET).hex $(TARGET).eep \
$(TARGET).lss sizeafter finished end
# Eye candy.
begin:
@$(BEGIN)
finished:
@$(FINISH)
end:
@$(END)
# Display size of file.
sizebefore:
@if [ -f $(TARGET).elf ]; then echo Size before:; $(ELFSIZE);fi
sizeafter:
@if [ -f $(TARGET).elf ]; then echo Size after:; $(ELFSIZE);fi
# Display compiler version information.
gccversion :
$(CC) --version
# Target: Convert ELF to COFF for use in debugging / simulating in AVR
Studio.
coff: $(TARGET).cof end
%.cof: %.elf
$(ELFCOFF) loadelf $< mapfile $*.map writecof $@
# Create final output files (.hex, .eep) from ELF output file.
%.hex: %.elf
$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
%.eep: %.elf
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load"
--change-section-lma .eeprom=0 -O $(FORMAT) $< $@
# Create extended listing file from ELF output file.
%.lss: %.elf
$(OBJDUMP) -h -S $< > $@
# Link: create ELF output file from object files.
.SECONDARY : $(TARGET).elf
.PRECIOUS : $(OBJ)
%.elf: $(OBJ)
$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)
# Compile: create object files from C source files.
%.o : %.c
$(CC) -c $(ALL_CFLAGS) $< -o $@
# Compile: create assembler files from C source files.
%.s : %.c
$(CC) -S $(ALL_CFLAGS) $< -o $@
# Assemble: create object files from assembler source files.
%.o : %.S
$(CC) -c $(ALL_ASFLAGS) $< -o $@
# Target: clean project.
clean: begin clean_list finished end
clean_list :
$(REMOVE) $(TARGET).hex
$(REMOVE) $(TARGET).eep
$(REMOVE) $(TARGET).obj
$(REMOVE) $(TARGET).cof
$(REMOVE) $(TARGET).elf
$(REMOVE) $(TARGET).map
$(REMOVE) $(TARGET).obj
$(REMOVE) $(TARGET).a90
$(REMOVE) $(TARGET).sym
$(REMOVE) $(TARGET).lnk
$(REMOVE) $(TARGET).lss
$(REMOVE) $(OBJ)
$(REMOVE) $(LST)
$(REMOVE) $(SRC:.c=.s)
$(REMOVE) $(SRC:.c=.d)
# Automatically generate C source code dependencies.
# (Code originally taken from the GNU make user manual and modified (See
README.txt Credits).)
# Note that this will work with sh (bash) and sed that is shipped with
WinAVR (see the SHELL variable defined above).
# This may not work with other shells or other seds.
%.d: %.c
set -e; $(CC) -MM $(ALL_CFLAGS) $< \
| sed 's,\(.*\)\.o[ :]*,\1.o \1.d : ,g' > $@; \
[ -s $@ ] || rm -f $@
# Remove the '-' if you want to see the dependency files generated.
-include $(SRC:.c=.d)
# Listing of phony targets.
.PHONY : all begin finish end sizebefore sizeafter gccversion coff clean
clean_list
Thanks for any help,
Jack
From: "David Brown" <address@hidden>
To: <address@hidden>
Subject: Re: [avr-gcc-list] AVRStudio and AVR GCC 3.3
Date: Thu, 5 Jun 2003 09:53:07 +0200
At the risk of re-openning old sores, the "clock skew detected" error is
due
to Win9x being incapable of getting file time-stamps correct. The stamps
can be a bit inaccurate (up to a few seconds, IIRC), leading make to get
confused over object files that were built in the future, or that are older
than the source files even after it has just recompiled them. Waiting a
few
seconds after saving your code before starting the make can sometimes help,
and it is sometimes useful to do a complete clean and re-build.
For the rest, give us a list of the files in your project (*not* the files
themselves), and a copy of your makefile. Maybe we can spot the problem.
mvh.
David
> Hello,
>
> I am trying to write a program for the ATMega16 using AVRStudio and
AVR-GCC
> 3.3 (which comes with WinAVR). I have followed the instructions in the
> Readme file, but still I get errors. I am testing the compiler with a
> simple program, I'm pretty sure there's no problems with that. But here
is
> what I've got (in file temp.c):
> #include <avr/io.h>
>
> unsigned int var;
>
> int main (void) {
> for(;;) {
> var++;
> }
> }
>
> I've got everything set up right in the makefile; the makefile, gcc.bat,
> gcc2.bat, temp.c and temp project file in the project; the targets all
and
> clean are set up and the settings have been configured (gcc.bat clean
and
> gcc.bat all); and when I build clean, I get lots of lines saying "rm -f
> temp.---" where --- is replaced by different extensions each time. At
the
> end, it says:
> Errors: none
> ------ end ------
> make.exe *** Warning: clock skew detected. Your build may be
incomplete.
>
> Errors detected during link stage
> Stopped
> And the make.exe line doesn't always appear.
> Then when I build the all target,
> I get: make.exe *** No rule to make target `foo.o', needed by
`temp.elf'.
> Stop.
>
> How can I fix this?
>
> Thanks,
> Jack
>
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