SES linker error

RE: SES linker error

RO — Tue, 03 Sep 2019 18:23:12 GMT

It's funny that I always assumed that "uint32_t ipn_messages_timeout" is a declaration and not a definition.

So can I use 'extern' to declare the variable in the header file, and then include the definition in every c file with #include data.h ?

RE: SES linker error

awneil — Wed, 28 Aug 2019 19:05:55 GMT

So, taking one at random,

Output/ble_bse_pca10056_s140 Debug/Obj/ipn.o:
  C:\nRF\Project\ble_bse/data.h:131: multiple definition of `ipn_messages_timeout'; 
  
Output/ble_bse_pca10056_s140 Debug/Obj/main.o:
  C:\nRF\Project\ble_bse/data.h:131: first defined here

You have ipn_messages_timeout from data.h being duplicated into ipn.o and main.o

In data.h you have:

uint32_t ipn_messages_timeout;
uint32_t pro_remote_timeout;
uint32_t ucm_timeout;

As gdpl guessed early on, these are definitions - therefore, any .c file which #includes data.h will get those definitions.

Thus if multiple .c files #include data.h, you will get multiple definitions - which is exactly what is happening.

They need to be declarations - not definitions.

And you will need to add a definition somewhere ...

Again, see: c-faq.com/.../decldef.html

RE: SES linker error

RO — Wed, 28 Aug 2019 18:54:24 GMT

This is the build log:

Building ‘ble_bse_pca10056_s140’ from solution ‘ble_bse_pca10056_s140’ in configuration ‘Debug’
  'Output/ble_bse_pca10056_s140 Debug/Obj/thumb_crt0.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/app_button.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/app_error.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/app_error_weak.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/app_scheduler.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/app_timer.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/app_util_platform.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/crc16.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/fds.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/hardfault_implementation.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_assert.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_atfifo.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_balloc.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_fprintf.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_fprintf_format.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_fstorage.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_fstorage_sd.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_memobj.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_pwr_mgmt.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_section_iter.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_strerror.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/sdk_mapped_flags.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/sensorsim.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_queue.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_serial.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_block_dev_sdc.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/app_sdcard.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_drv_spi.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/boards.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_drv_clock.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_drv_common.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_drv_gpiote.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_drv_uart.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/bsp.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/bsp_btn_ble.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/bsp_nfc.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/main.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/SEGGER_RTT.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/SEGGER_RTT_Syscalls_SES.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/SEGGER_RTT_printf.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ble_advdata.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ble_advertising.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ble_conn_params.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ble_conn_state.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ble_srv_common.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/gatt_cache_manager.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/gatts_cache_manager.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/id_manager.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_ble_gatt.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/peer_data_storage.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/peer_database.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/peer_id.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/peer_manager.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/pm_buffer.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/pm_mutex.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/security_dispatcher.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/security_manager.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_ble_qwr.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ses_nRF_Startup.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ses_nrf52840_Vectors.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/system_nrf52840.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_sdh.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_sdh_ble.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/nrf_sdh_soc.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ble_ipn_monitor_service.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/char_enc_dec.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ipn.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ipnmonitor.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/logic.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/rs485.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/sdcard.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/ff.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/diskio_blkdev.o' is up to date
  'Output/ble_bse_pca10056_s140 Debug/Obj/unicode.o' is up to date
  Allow Multiple Symbol Definition property has changed.
  Linking ble_bse_pca10056_s140.elf
    Output/ble_bse_pca10056_s140 Debug/Obj/ipn.o:C:\nRF\Project\ble_bse/data.h:131: multiple definition of `ipn_messages_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:131: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/ipn.o:C:\nRF\Project\ble_bse/data.h:132: multiple definition of `pro_remote_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:132: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/ipn.o:C:\nRF\Project\ble_bse/data.h:133: multiple definition of `ucm_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:133: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/ipn.o:C:\nRF\Project\ble_bse/ipn.h:238: multiple definition of `ipn_state'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/ipn.h:238: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/data.h:131: multiple definition of `ipn_messages_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:131: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/data.h:132: multiple definition of `pro_remote_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:132: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/data.h:133: multiple definition of `ucm_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:133: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/ipn.h:238: multiple definition of `ipn_state'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/ipn.h:238: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdcard.h:39: multiple definition of `sdc_card_inserted'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:39: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdcard.h:40: multiple definition of `sdc_status'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:40: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdcard.h:41: multiple definition of `sdc_msg'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:41: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdclog.h:18: multiple definition of `one_min_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:18: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdclog.h:19: multiple definition of `six_min_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:19: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdclog.h:20: multiple definition of `logging_period'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:20: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdclog.h:21: multiple definition of `log_period_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:21: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/logic.o:C:\nRF\Project\ble_bse/sdclog.h:22: multiple definition of `log_records_written'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:22: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/rs485.o:C:\nRF\Project\ble_bse/data.h:131: multiple definition of `ipn_messages_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:131: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/rs485.o:C:\nRF\Project\ble_bse/data.h:132: multiple definition of `pro_remote_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:132: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/rs485.o:C:\nRF\Project\ble_bse/data.h:133: multiple definition of `ucm_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:133: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/rs485.o:C:\nRF\Project\ble_bse/ipn.h:238: multiple definition of `ipn_state'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/ipn.h:238: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdcard.o:C:\nRF\Project\ble_bse/sdcard.h:39: multiple definition of `sdc_card_inserted'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:39: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdcard.o:C:\nRF\Project\ble_bse/sdcard.h:40: multiple definition of `sdc_status'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:40: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdcard.o:C:\nRF\Project\ble_bse/sdcard.h:41: multiple definition of `sdc_msg'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:41: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdcard.h:39: multiple definition of `sdc_card_inserted'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:39: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdcard.h:40: multiple definition of `sdc_status'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:40: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdcard.h:41: multiple definition of `sdc_msg'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:41: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/data.h:131: multiple definition of `ipn_messages_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:131: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/data.h:132: multiple definition of `pro_remote_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:132: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/data.h:133: multiple definition of `ucm_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:133: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdclog.h:18: multiple definition of `one_min_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:18: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdclog.h:19: multiple definition of `six_min_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:19: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdclog.h:20: multiple definition of `logging_period'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:20: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdclog.h:21: multiple definition of `log_period_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:21: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/sdclog.o:C:\nRF\Project\ble_bse/sdclog.h:22: multiple definition of `log_records_written'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:22: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/data.h:131: multiple definition of `ipn_messages_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:131: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/data.h:132: multiple definition of `pro_remote_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:132: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/data.h:133: multiple definition of `ucm_timeout'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/data.h:133: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/ipn.h:238: multiple definition of `ipn_state'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/ipn.h:238: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdcard.h:39: multiple definition of `sdc_card_inserted'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:39: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdcard.h:40: multiple definition of `sdc_status'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:40: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdcard.h:41: multiple definition of `sdc_msg'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdcard.h:41: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdclog.h:18: multiple definition of `one_min_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:18: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdclog.h:19: multiple definition of `six_min_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:19: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdclog.h:20: multiple definition of `logging_period'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:20: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdclog.h:21: multiple definition of `log_period_ctr'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:21: first defined here
    Output/ble_bse_pca10056_s140 Debug/Obj/service_if.o:C:\nRF\Project\ble_bse/sdclog.h:22: multiple definition of `log_records_written'; Output/ble_bse_pca10056_s140 Debug/Obj/main.o:C:\nRF\Project\ble_bse/sdclog.h:22: first defined here
Build failed

Just referring to the first linker error, I'm posting the 'data.h' file so that you can see the variable declaration/definition of 'ipn_messages_timeout'

devzone.nordicsemi.com/.../data.h

RE: SES linker error

awneil — Wed, 28 Aug 2019 17:00:56 GMT

[quote userid="25505" url="~/f/nordic-q-a/49811/ses-linker-error/206705"]Any other source of the'multiple definition' linker error?

[/quote]

The error messages tell you where all of the multiple definitions are being found.

Post an up-to-date build log.

(post it as for source code, but omit step 3).

[quote userid="25505" url="~/f/nordic-q-a/49811/ses-linker-error/206705"]will this approach work[/quote]

You should not have multiple definitions - so this approach would only be hiding what really are errors in your code.

So, even if it did appear to work under certain circumstances, it would be on very shaky foundations!

RE: SES linker error

RO — Wed, 28 Aug 2019 16:48:34 GMT

Back on this again,

I inspected the header files, I really could not see variable definitions, I only found variable declarations.
Any other source of the'multiple definition' linker error?

I also tried enabling 'allow multiple definition' in the project Linker options. The project builds successfully now, but will this approach work?

RE: SES linker error

awneil — Wed, 14 Aug 2019 16:16:47 GMT

As gdpl said earlier, it looks like you may have variable definitions in your headers.

http://c-faq.com/decl/decldef.html

RE: SES linker error

RO — Wed, 14 Aug 2019 15:51:32 GMT

sorry I was trying to edit the post, and I think it got deleted (intermittent connectivity), yes I'm looking at how to resolve 'multiple definition' errors, thanks

RE: SES linker error

awneil — Wed, 14 Aug 2019 15:47:49 GMT

Hmmm - I received an email notification that RO posted a reply, but the reply is not here in the forum!

Anyhow, the reply shows a whole load of 'multiple definition' Linker errors - so that'll be why the build is failing.

RE: SES linker error

awneil — Wed, 14 Aug 2019 14:56:02 GMT

What you've highlighted isn't an error.

Copy & paste the full output.

Post as for source code, but omit step 3:

RE: SES linker error

RO — Wed, 14 Aug 2019 14:39:02 GMT

After a lot of rework, I've managed to eliminate compiler and linker errors, but the Build still fails.

Can someone explain what I might need to do?

Thanks

RE: SES linker error

awneil — Fri, 19 Jul 2019 10:49:25 GMT

[quote userid="25505" url="~/f/nordic-q-a/49811/ses-linker-error/199362"]was developed by someone who was working this earlier[/quote]

How far had they got?

Are they still available to help you?

Trying to fix someone else's mess is often harder than just starting again from scratch ...

RE: SES linker error

awneil — Fri, 19 Jul 2019 10:47:06 GMT

[quote userid="25505" url="~/f/nordic-q-a/49811/ses-linker-error/199363"]The Nordic environment seems very complicated and seems to have a steep learning curve.[/quote]

But what it does is very complicated!

Not only do you have all the usual complications of a high-performance 32-bit ARM Cortex-M4 Microcontroller with FPU - but on top of that you are adding a complete 2.4GHz radio system capable of very complex protocols like BLE, Zigbee, Mesh, etc, etc.

It's really not for beginner projects.

EDIT

RE: SES linker error

RO — Thu, 18 Jul 2019 19:52:12 GMT

Just some basic simpler stuff. The Nordic environment seems very complicated and seems to have a steep learning curve.

RE: SES linker error

RO — Thu, 18 Jul 2019 19:50:12 GMT

I've attached a project folder from github in the question, which was developed by someone who was working this earlier. The sdkconfig file seems very incomplete, can you confirm?

Thanks

RE: SES linker error

awneil — Wed, 17 Jul 2019 20:17:41 GMT

[quote userid="64258" url="~/f/nordic-q-a/49811/ses-linker-error/199082"]Maybe you have defined some variables in header .h file[/quote]

Yes, that's a common mistake.

http://c-faq.com/decl/decldef.html

RE: SES linker error

gdpl — Wed, 17 Jul 2019 19:32:46 GMT

Multiple definitions: Maybe you have defined some variables in header .h file. Move them to .c file of library .

RE: SES linker error

awneil — Wed, 17 Jul 2019 10:34:54 GMT

[quote userid="20690" url="~/f/nordic-q-a/49811/ses-linker-error/198919"]Make sure that you have added all your header files, libraries etc[/quote]

And, for Nordic stuff, also enabled them in the sdk_config.h ...

https://devzone.nordicsemi.com/f/nordic-q-a/39503/undefined-reference-on-the-linker-level/153004#153004

https://devzone.nordicsemi.com/f/nordic-q-a/43204/how-to-include-existing-header-files-to-main-c/168999#168999

RE: SES linker error

awneil — Wed, 17 Jul 2019 10:33:53 GMT

[quote userid="25505" url="~/f/nordic-q-a/49811/ses-linker-error"]I'm new to firmware development[/quote]

Do you have experience with software development in any other context?

Particularly, development in 'C' ?

RE: SES linker error

Joakim Jakobsen — Wed, 17 Jul 2019 10:14:51 GMT

Hi.

I'm afraid I don't have any idea to what your code looks like, which modifications you have made or which custom libraries you have added to your project.

However, most of the errors seem to be quite straight forward to track down as they are mostly undefined reference to functions etc.
If you don't know what the errors means, I suggest that you do a quick google search on how to solve them.

Make sure that you have added all your header files, libraries etc. correctly so that you can reference your functions in your application.

Best regards,
Joakim Jakobsen