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--bestdebug, --no_bestdebug

This option selects between linking for smallest code/data size or best debug illusion. Input objects might contain common data (COMDAT) groups, but these might not be identical across all input objects because of differences such as objects compiled with different optimization levels.

Default

The default is --no_bestdebug. This ensures that the code and data of the final image are the same regardless of whether you compile for debug or not. The smallest COMDAT groups are selected when linking, at the expense of a possibly slightly poorer debug illusion.

Usage

Use --bestdebug to select COMDAT groups with the best debug view. Be aware that the code and data of the final image might not be the same when building with or without debug.

Example

For two objects compiled with different optimization levels:

armcc -c -O2 file1.c
armcc -c -O0 file2.c
armlink --bestdebug fil1.o file2.o -o image.axf
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