TMS320F28379D: Unused Code Appears In the Output File

Ed Sanders

Greetings,

I have a project where I commented out some unused routines. The project built with no issues and I recorded the unused flash from the map file. Then I uncommented out the unused routines and rebuilt, again iwth no issues. I examined the unused flash from the new map file and discovered that the amount had dropped.

I was under the impression that the linker would not add a routine to the output if it wasn’t being used. I have tried to find something in the Linker section of the project properties which would enable/disable this feature, but I have not been able to find anything. Am I mistaken about the linker behavior, or is there a setting I need to make?

Thank you,

over 5 years ago

0 Veena Kamath over 5 years ago

TI__Mastermind 32655 points

Hi Ed,

Are you using a COFF compiler or EABI compiler?

Regards,

Veena

0 Veena Kamath over 5 years ago in reply to Veena Kamath

TI__Mastermind 32655 points

Hi Ed,

Linker can remove unreferenced sections from the final .out.

Have you enabled the compile option --gen_func_subsections (C2000 Compiler->Advanced Options->Runtime Model Options)? This will place each function into a separate subsection. So any unreferenced functions will be removed in the linking stage.

If you have this option disabled, the entire text section in one .c file is considered as one section. If any function in that file is referenced, the entire section will be included in the linking stage.

Regards,

Veena

0 Ed Sanders over 5 years ago in reply to Veena Kamath

Genius 4135 points

Hi Veena,

I don't know how to tell the difference, but it outputs a COFF file. The name is "ti-cgt-c2000_18.12.5.LTS".

Regards,

0 Ed Sanders over 5 years ago in reply to Veena Kamath

Genius 4135 points

Hi Veena,

Setting --gen_func_subsections to on did the trick.

Thank you for your help,

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TMS320F28379D: Unused Code Appears In the Output File