linking problems with newer than 4.5 gcc versions

Oscar, your description doesn't provide enough information to reproduce or analyse. Can you share error message and reduced case?

- Joey

I download the Instant Contiki last release from GIT. If I use the included compiler gcc 4.5 compile and link OK for the STM32W108 processor (Cortex M3). If I use a newer release than gcc 4.5 I got a liker error and the error said that the linker counter cannot go backwards. I do not have the computer with me now I will post the error message as soon as possible.
I tried this with code sourcery compilers and only gcc 4.5 worked fine for me.

Thanks

Below the message comming from make:

oscar@LinuxD630 ~/Contiki_All/contiki/examples/hello-world $ make TARGET=mb951
../../platform/mb951/Makefile.mb951:31: warning: overriding commands for target `login'
../../cpu/stm32w108/Makefile.stm32w108:296: warning: ignoring old commands for target `login'
arm-none-eabi-gcc -DCONTIKI=1 -DCONTIKI_TARGET_MB951=1 -mthumb -mcpu=cortex-m3 -D "PLATFORM_HEADER=\"hal/micro/cortexm3/compiler/gnu.h\"" -D BOARD_HEADER=\"board.h\" -g -Wall -Wno-strict-aliasing -mlittle-endian -D BOARD_MB851 -D CORTEXM3 -D CORTEXM3_STM32W108 -D PHY_STM32W108XX -D DISABLE_WATCHDOG -D ENABLE_ADC_EXTENDED_RANGE_BROKEN -D __SOURCEFILE__=\"hello-world.c\" -Os -ffunction-sections -I. -I../../platform/mb951/. -I../../platform/mb951/dev -I../../cpu/stm32w108/. -I../../cpu/stm32w108/dev -I../../cpu/stm32w108/hal -I../../cpu/stm32w108/simplemac -I../../cpu/stm32w108/hal/micro/cortexm3 -I../../cpu/stm32w108/hal/micro/cortexm3/stm32w108 -I../../core/dev -I../../core/lib -I../../core/net -I../../core/net/mac -I../../core/net/rime -I../../core/net/rpl -I../../core/sys -I../../core/cfs -I../../core/ctk -I../../core/lib/ctk -I../../core/loader -I../../core/. -I../../platform/mb951/ -DCONTIKI_VERSION_STRING=\"Contiki-2.6-324-ga7b3e99\" -DAUTOSTART_ENABLE -c hello-world.c -o hello-world.co
arm-none-eabi-gcc -DCONTIKI=1 -DCONTIKI_TARGET_MB951=1 -mthumb -mcpu=cortex-m3 -D "PLATFORM_HEADER=\"hal/micro/cortexm3/compiler/gnu.h\"" -D BOARD_HEADER=\"board.h\" -g -Wall -Wno-strict-aliasing -mlittle-endian -D BOARD_MB851 -D CORTEXM3 -D CORTEXM3_STM32W108 -D PHY_STM32W108XX -D DISABLE_WATCHDOG -D ENABLE_ADC_EXTENDED_RANGE_BROKEN -D __SOURCEFILE__=\"symbols.c\" -Os -ffunction-sections -I. -I../../platform/mb951/. -I../../platform/mb951/dev -I../../cpu/stm32w108/. -I../../cpu/stm32w108/dev -I../../cpu/stm32w108/hal -I../../cpu/stm32w108/simplemac -I../../cpu/stm32w108/hal/micro/cortexm3 -I../../cpu/stm32w108/hal/micro/cortexm3/stm32w108 -I../../core/dev -I../../core/lib -I../../core/net -I../../core/net/mac -I../../core/net/rime -I../../core/net/rpl -I../../core/sys -I../../core/cfs -I../../core/ctk -I../../core/lib/ctk -I../../core/loader -I../../core/. -I../../platform/mb951/ -DCONTIKI_VERSION_STRING=\"Contiki-2.6-324-ga7b3e99\" -MMD -c symbols.c -o obj_mb951/symbols.o
arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -Wl,-T -Xlinker ../../cpu/stm32w108/gnu.ld -Wl,-static -u Default_Handler -nostartfiles -Wl,-Map -Xlinker contiki-mb951.map -Wl,--gc-sections -Wl,--section-start=.coffee=0x801F800 hello-world.co obj_mb951/symbols.o -Wl,-\( contiki-mb951.a ../../cpu/stm32w108/simplemac/library/simplemac-library-gnu.a ../../cpu/stm32w108/lib/e_stdio_intonly_thumb2.a -Wl,-\) -o hello-world.mb951
../../cpu/stm32w108/gnu.ld:98 cannot move location counter backwards (from 000000000801f800 to 0000000000000000)
collect2: error: ld returned 1 exit status
make: *** [hello-world.mb951] Error 1
rm obj_mb951/symbols.o hello-world.co

this error was gotten using sunamon script with Linaro 4.7, if used gcc 4.5 the liker finishes correctly.
Thanks

Oscar,

Sorry that we haven't reproduced your problem yet. Still need further work.

- Joey