Hi, This is my first project using ARM devices, and also FreeRtos, therefore I suppose my issues below are common knowledge here.. ;-) I am targetting a LPC2387 or similar device for my project. In order to get going rapidly, and to familirise myself with the environment I decided to compile the 2106 GCC demo. Compilation went ok, but not the linking, and I think that it is basically a thumbmode issue, since the arm mode compiles+links OK. {would you agree?} Thing is, my understanding is that thumbmode is a good thing, and I’d like to use it. So fixing this issue is top on my todo list.. The toolchain where built using crossdev on gentoo linux, and I guess this is where I need to have libgcc support INTERWORKING somehow? Thanks, Micael micke@atle ~/projects/FreeRTOS/Demo/ARM7_LPC2106_GCC $ make arm-elf-gcc -Wall -Wextra -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-align -Wsign-compare -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wunused -D RUN_FROM_RAM -D GCC_ARM7 -I. -I../../Source/include -I../Common/include -g -mcpu=arm7tdmi -Tlpc2106-ram.ld -O0 -fomit-frame-pointer -fno-strict-aliasing -mthumb-interwork -D THUMB_INTERWORK ../../Source/portable/GCC/ARM7_LPC2000/portISR.o serial/serialISR.o main.o serial/serial.o ParTest/ParTest.o ../Common/Minimal/integer.o ../Common/Minimal/flash.o ../Common/Minimal/PollQ.o ../Common/Minimal/comtest.o ../Common/Minimal/flop.o ../Common/Minimal/semtest.o ../Common/Minimal/dynamic.o ../Common/Minimal/BlockQ.o ../../Source/tasks.o ../../Source/queue.o ../../Source/list.o ../../Source/portable/MemMang/heap_2.o ../../Source/portable/GCC/ARM7_LPC2000/port.o -nostartfiles boot.s -Xlinker -ortosdemo.elf -Xlinker -M -Xlinker -Map=rtosdemo.map collect2: ld terminated with signal 11 [Segmentation fault] /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/libgcc.a(_udivsi3.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/libgcc.a(_divsi3.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/libgcc.a(_umodsi3.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/libgcc.a(_dvmd_tls.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/libgcc.a(_addsubdf3.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/libgcc.a(_muldivdf3.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/libgcc.a(_cmpdf2.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/../../../../arm-elf/lib/libg.a(lib_a-memcpy.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/../../../../arm-elf/lib/libg.a(lib_a-memset.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: Warning: /usr/lib/gcc/arm-elf/4.2.4/../../../../arm-elf/lib/libg.a(lib_a-strncpy.o) does not support interworking, whereas rtosdemo.elf does /usr/libexec/gcc/arm-elf/ld: /usr/lib/gcc/arm-elf/4.2.4/../../../../arm-elf/lib/libg.a(lib_a-memset.o)(memset): warning: interworking not enabled.   first occurrence: main.o: thumb call to arm /usr/libexec/gcc/arm-elf/ld: BFD (GNU Binutils) 2.18 assertion fail /var/tmp/cross/arm-elf/portage/cross-arm-elf/binutils-2.18-r3/work/binutils-2.18/bfd/elf32-arm.c:6532 main.o: In function `vMemCheckTask’: /home/micke/projects/FreeRTOS/Demo/ARM7_LPC2106_GCC/main.c:451: dangerous relocation: make: *** [rtosdemo.elf] Error 1

Don’t know about Linux, but on Win32 I only ever use pre built GCC versions and have never come across this problem. Are there pre built GCC versions that can be tried on Linux? From the error I would guess that you need to build libgcc with the -thumb-interwork compile time option.

Thanks, the libs are built with crossdev, which generates the full toolchain from sources automagically. I have learned since about an hour, that crossdev actually are building both a arm and thumb variant of libgcc. So all I need to do is to find out where that default lib path is set. Which at this point is not obvious to me. :) But at least, I

FYI, there are also pre-built toolchains at: http://www.codesourcery.com/gnu_toolchains/arm/portal/subscription3053 http://www.gnuarm.com/ Regards, Caglar