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Help me to build FreeRTOS using g++

Posted by Leonidos mak on December 28, 2008
HI. I very need your help )

I want to use c++ with FreeRTOS. I read that I can build FreeRTOS with g++ and use c++. So I downloaded FreeRTOS demo (CORTEX_LM3Sxxxx_Eclipse), and change "arm-none-eabi-gcc" to "arm-none-eabi-g++"....


There was many errors, so I have to add some typecasts and to remove data hiding....

And than he told me this:
.......
ALIGN_STRUCT_END=__attribute\(\(aligned\(4\)\)\) -D sprintf=usprintf -D snprintf=usnprintf -D printf=uipprintf -I ../../Common/ethernet/uIP/uip-1.0/uip -I ./webserver -ffunction-sections -fdata-sections -I ../../Common/drivers/LuminaryMicro main.o timertest.o ./ParTest/ParTest.o rit128x96x4.o osram128x64x4.o formike128x128x16.o ../../Common/drivers/LuminaryMicro/ustdlib.o ../../Common/Minimal/BlockQ.o ../../Common/Minimal/blocktim.o ../../Common/Minimal/death.o ../../Common/Minimal/integer.o ../../Common/Minimal/PollQ.o ../../Common/Minimal/semtest.o ../../Common/Minimal/GenQTest.o ../../Common/Minimal/QPeek.o ../../Common/Minimal/recmutex.o ../../Common/Minimal/IntQueue.o ./IntQueueTimer.o ./webserver/uIP_Task.o ./webserver/emac.o ./webserver/httpd.o ./webserver/httpd-cgi.o ./webserver/httpd-fs.o ./webserver/http-strings.o ../../Common/ethernet/uIP/uip-1.0/uip/uip_arp.o ../../Common/ethernet/uIP/uip-1.0/uip/psock.o ../../Common/ethernet/uIP/uip-1.0/uip/timer.o ../../Common/ethernet/uIP/uip-1.0/uip/uip.o ../../../Source/list.o ../../../Source/queue.o ../../../Source/tasks.o ../../../Source/portable/GCC/ARM_CM3/port.o ../../../Source/portable/MemMang/heap_2.o startup.o ../../Common/drivers/LuminaryMicro/arm-none-eabi-gcc/libdriver.a ../../Common/drivers/LuminaryMicro/arm-none-eabi-gcc/libgr.a -nostartfiles -Xlinker -oRTOSDemo.axf -Xlinker -M -Xlinker -Map=rtosdemo.map -Xlinker --no-gc-sections
d:/arm/bin/../lib/gcc/arm-none-eabi/4.2.3/../../../../arm-none-eabi/bin/ld.exe: section .ARM.exidx.text._Z29vApplicationStackOverflowHookPP19tskTaskControlBlockPa [00016184 -> 0001618b] overlaps section .data [00016184 -> 000167d7]
d:/arm/bin/../lib/gcc/arm-none-eabi/4.2.3/../../../../arm-none-eabi/bin/ld.exe: section .bss [000167d8 -> 000209c3] overlaps section .ARM.exidx.text._Z10clock_initv [000167d4 -> 000167db]
d:/arm/bin/../lib/gcc/arm-none-eabi/4.2.3/../../../../arm-none-eabi/bin/ld.exe: section .ARM.extab.text._Z28vApplicationProcessFormInputPcl [000167dc -> 000167e7] overlaps section .bss [000167d8 -> 000209c3]
main.o: In function `vOLEDTask':
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/main.c:432: undefined reference to `usprintf'
./webserver/httpd.o: In function `handle_input':
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:256: undefined reference to `http_get'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:256: undefined reference to `http_get'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:266: undefined reference to `http_index_html'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:266: undefined reference to `http_index_html'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:287: undefined reference to `http_referer'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:287: undefined reference to `http_referer'
./webserver/httpd.o: In function `send_headers':
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:198: undefined reference to `http_content_type_binary'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:198: undefined reference to `http_content_type_binary'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:198: undefined reference to `http_content_type_binary'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:198: undefined reference to `http_content_type_binary'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:199: undefined reference to `http_html'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:199: undefined reference to `http_html'
C:\Documents and Settings\Leonidos\Desktop\FreeRTOS\Demo\CORTEX_LM3Sxxxx_Eclipse\RTOSDemo/webserver/httpd.c:199: undefined reference to `http_shtml'
......

Please give me some advice to undestang what is going on there. )
Thanks.

RE: Help me to build FreeRTOS using g++

Posted by Leonidos mak on December 28, 2008
I've read that I can compile .c files as C and .cpp files as C++... but I cant write such make file... I found some, but it isn't work...

It would be wonderful if someone give us instructions how to use C++ with FreeRTOS. Maybe some one have make file I need. I ready to donate some money to person who help me to solve my problems.

Thanks for your help.

RE: Help me to build FreeRTOS using g++

Posted by dave m on December 29, 2008
I've been using FreeRTOS with g++ on LM3Sxxxx processors for a while now. You shouldn't try to compile the FreeRTOS base files with c++; it's probably too much work, and no benefit. My Makefiles use gcc for the FreeRTOS files and g++ for my own code. Link with g++ and you should be good to go. Here is my Makefile for the USB device I've been working on. It is more complicated than you really need, because I use the same code & Makefiles to build binaries for LPC2K and GameBoy SP/DS machines (the USB code doesn't work on the GameBoy, of course).

I have a clean version of FreeRTOS installed in a directory tree outside my own code, and I use VPATH to help make find the files. (I think I may have had to copy/modify one or two FreeRTOS files to make all this work, but it's worth the small amount of hassle for the ability to swap in a new version of FreeRTOS without having to separate out my code or figure out what changes I made.)

##
## Makefile
##
## Made by dave m. <xxx@yyy.com>
##
## Started on Sat Jan 19 18:02:01 2008 dave m.
## Last update Sat Jan 19 18:02:01 2008 dave m.
##

CPU_FAMILY=LM3Sx
#CPU_FAMILY=LPC2k
#CPU_FAMILY=GBA

TARGET=USBTest

SOURCES=main.cc \
mydevice.cc \
util.cc \
usb.cc \
usb-descriptors.cc \
usb-endpoints.cc \
usb-interface.cc \
usb-configuration.cc \
usb-device.cc \
usb-string.cc \
usb-ep0.cc \
usb-debug.cc \
serial_io.cc \
list.c \
queue.c \
tasks.c \
port.c \
heap_1.c

LOADLIBES=-lEMF \
-lc \
-lgcc

#############################################################################
#############################################################################
#############################################################################

ifeq ($(CPU_FAMILY),LM3Sx)
CPUFLAGS=-mcpu=cortex-m3 -mthumb
DEFINES+=-DGCC_ARMCM3
FreeRTOS_PLATFORM=GCC/ARM_CM3
endif
ifeq ($(CPU_FAMILY),LPC2k)
CPUFLAGS=-mcpu=arm7tdmi -march=armv4t -mthumb-interwork
#CPUFLAGS=-mcpu=arm7tdmi -march=armv4t -mthumb -mthumb-interwork
DEFINES+=-DGCC_LPC2k
FreeRTOS_PLATFORM=GCC/ARM7_LPC2k
endif
ifeq ($(CPU_FAMILY),GBA)
CPUFLAGS=-mcpu=arm7tdmi -march=armv4t -mthumb-interwork
#CPUFLAGS=-mcpu=arm7tdmi -march=armv4t -mthumb -mthumb-interwork
DEFINES+=-DGCC_GBA
FreeRTOS_PLATFORM=GCC/ARM7_GBA
endif

VPATH=../../../FreeRTOS/Source \
../../../FreeRTOS/Source/portable/MemMang \
../../../FreeRTOS/Source/portable/$(FreeRTOS_PLATFORM)

MLDIR=$(shell $(CC) $(CPUFLAGS) -print-multi-directory)

LIBDIRS=-L../../lib/$(MLDIR)

ifneq (,$(findstring -mthumb,$(filter-out -mthumb-interwork,$(CPUFLAGS))))
DEFINES+=-DTHUMB
endif

INCLUDES+=-I. \
-I../../include \
-I../../include/$(CPU_FAMILY) \
-I../../Source/include \
-I../../../Luminary

CPPFLAGS?=$(DEFINES) $(INCLUDES)

CDEBUGFLAGS?=-O3 -g -Wall \
--no-exceptions \
-mfloat-abi=soft -mfpu=vfp \
$(CPUFLAGS)

CFLAGS+=$(CDEBUGFLAGS)
CXXFLAGS+=$(CDEBUGFLAGS) \
--no-rtti \
-fno-threadsafe-statics

LDFLAGS=-Wl,-N,-M,--demangle,--sort-common,-u,__boot__ \
-Wl,-T,../../etc/$(CPU_FAMILY)-ld.cmd \
-Wl,--defsym -Wl,__cxa_pure_virtual=0 \
-nostdlib \
-mfloat-abi=soft -mfpu=vfp \
$(CPUFLAGS) \
$(LIBDIRS)

TOOLPREFIX=arm-elf-
CC=$(TOOLPREFIX)gcc
CXX=$(TOOLPREFIX)g++
LD=$(TOOLPREFIX)ld
AS=$(TOOLPREFIX)as
AR=$(TOOLPREFIX)ar
OBJCOPY=$(TOOLPREFIX)objcopy
OBJDUMP=$(TOOLPREFIX)objdump

sOBJ=$(SOURCES:.s=.o)
cOBJ=$(sOBJ:.c=.o)
OBJ=$(cOBJ:.cc=.o)

all:$(TARGET).bin

$(TARGET):$(OBJ)
$(CXX) $(LDFLAGS) -o $@ $^ $(LOADLIBES) > $@.map
$(OBJDUMP) --disassemble-all --demangle $@ > $@.lst

clean:
$(RM) $(TARGET) $(TARGET).hex $(TARGET).bin $(TARGET).map $(TARGET).lst \
$(OBJ) *.d

%.hex:%
$(OBJCOPY) -S -O ihex $< $@

%.bin:%
$(OBJCOPY) -S -O binary $< $@


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