Error Listing symbols

Question

Hi All, 
 I am working on BLE+SD card.I am getting following error:- 
 *** Using Compiler 'V5.06 update 4 (build 422)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin'
Build target 'nrf52832_xxaa'
compiling main.c...
linking...
.\_build
rf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_block_device_sdc_ops (referred from main.o).
Not enough information to list image symbols.
Finished: 1 information, 0 warning and 1 error messages.
".\_build
rf52832_xxaa.axf" - 1 Error(s), 0 Warning(s).
Target not created.
Build Time Elapsed: 00:00:15
 
 I know this is happening because compiler is not able to find particular header files correctly. 
 Can you help me counter this problem? 
 Thanks in advance. 
 Regards

Jørgen Holmefjord · Accepted Answer

Hi, 
 This error is due to the compiler not being able to find the implementation of the symbol , it have found the declaration of the function in the header file. If the header file was not found, you would get an error that the particular header file was not found. If the declaration was not found in any file, you would get error that the function was declared implicitly. 
 Over to the issue: you have most likely not included the source file nrf_block_device_sdc.c in you project. nrf_block_device_sdc_ops is created in the end of the file: 
 const nrf_block_dev_ops_t nrf_block_device_sdc_ops = {
 .init = block_dev_sdc_init,
 .uninit = block_dev_sdc_uninit,
 .read_req = block_dev_sdc_read_req,
 .write_req = block_dev_sdc_write_req,
 .ioctl = block_dev_sdc_ioctl,
 .geometry = block_dev_sdc_geometry,
};
 
 How are you referencing this in main? 
 Best regards, 
 Jørgen

Error Listing symbols

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