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_start not found

oscalcmen

Using eclipse and code sorcery compiler I got an undefined label error, see below [b]_build/gcc_startup_nrf51.o: In function Reset_Handler': /home/oscar/workspace/Nordic/nrf51822/Source/templates/gcc/gcc_startup_nrf51.s:150: undefined reference to_start'[/b] "/opt/arm-2013.05/bin/arm-none-eabi-gcc" -DNRF51822_QFAA_CA -mcpu=cortex-m0 -mthumb -mabi=aapcs -DNRF51 -DBOARD_NRF6310 -DNRF51822_QFAA_CA --std=gnu99 -Wall -Werror -mfloat-abi=soft -DDEBUG -g3 -O0 -I"/home/oscar/workspace/Nordic/nrf51822/Include/ble" -I"/home/oscar/workspace/Nordic/nrf51822/Include/ble/softdevice" -I"/home/oscar/workspace/Nordic/nrf51822/Include/app_common" -I"/home/oscar/workspace/Nordic/nrf51822/Include/ble/ble_services" -I"../" -I"/home/oscar/workspace/Nordic/nrf51822/Include" -I"/home/oscar/workspace/Nordic/nrf51822/Include/gcc" -I"/home/oscar/workspace/Nordic/nrf51822/Include/ext_sensors" -M /home/oscar/workspace/Nordic/nrf51822/Source/ble/ble_services/ble_srv_common.c -MF "_build/ble_srv_common.d" -MT _build/ble_srv_common.o [b]collect2: error: ld returned 1 exit status make: *** [_build/ble_hrs_gcc_s110_xxaa.out] Error 1[/b] Where is the _start defined?
Any help?

  • 0

    Which version of the SDK and GCC do you use? This seems to indicate that your compilation process is not set up correctly.

    In the latest SDK version 4.3 we changed from CodeSourcery to the upstream ARM toolchain available here. This error you get could indicate that you're trying to compile an application from 4.3 with the CodeSourcery toolchain. If so, please try replacing it with this one, and see if that solves the error.

  • 0

    Hello Ole, Using the ARM toolchain _start label error is gone but now I got this: /opt/gcc-arm-none-eabi-4_7-2013q2/arm-none-eabi/lib/armv6-m/libc.a(lib_a-exit.o): In function exit': exit.c:(.text.exit+0x18): undefined reference to_exit' collect2: error: ld returned 1 exit status make: *** [_build/ble_hrs_gcc_s110_xxaa.out] Error 1

    any idea?

    Thanks Oscar

  • 0 in reply to oscalcmen

    Do you know if this exit function or label part of libc.a or crt0.o ? I found a an exit reference in the crt0.o file: RELOCATION RECORDS FOR [.text]: OFFSET TYPE VALUE 00000090 UNKNOWN memset 000000d0 UNKNOWN atexit 000000d4 UNKNOWN __libc_init_array 000000e0 UNKNOWN main 000000e4 UNKNOWN exit 000000ec UNKNOWN __stack 000000f0 UNKNOWN hardware_init_hook 000000f4 UNKNOWN software_init_hook 000000f8 UNKNOWN bss_start 000000fc UNKNOWN bss_end 00000100 UNKNOWN __libc_fini_array

    but it is not used when linking _build/ble_hrs_gcc_s110_xxaa.out

  • 0 in reply to oscalcmen

    Do you know if this exit function or label part of libc.a or crt0.o ? I found a an exit reference in the crt0.o file: RELOCATION RECORDS FOR [.text]: OFFSET TYPE VALUE 00000090 UNKNOWN memset 000000d0 UNKNOWN atexit 000000d4 UNKNOWN __libc_init_array 000000e0 UNKNOWN main 000000e4 UNKNOWN exit 000000ec UNKNOWN __stack 000000f0 UNKNOWN hardware_init_hook 000000f4 UNKNOWN software_init_hook 000000f8 UNKNOWN bss_start 000000fc UNKNOWN bss_end 00000100 UNKNOWN __libc_fini_array

    but it is not used when linking _build/ble_hrs_gcc_s110_xxaa.out

  • 0

    Check if you have "GROUP(-lgcc -lc -lnosys)" in your linker script. Especially that -lnosys part.

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