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--interleave=option

Inserts the original source code as comments into the disassembly if debug information is present.

--interleave=option

Where option can be one of the following:

line_directives: Interleaves #line directives containing filenames and line numbers of the disassembled instructions.
line_numbers: Interleaves comments containing filenames and line numbers of the disassembled instructions.
none: Disables interleaving. This is useful if you have a generated makefile where the fromelf command has multiple options in addition to --interleave. You can then specify --interleave=none as the last option to ensure that interleaving is disabled without having to reproduce the complete fromelf command.
source: Interleaves comments containing source code. If the source code is no longer available then fromelf interleaves in the same way as line_numbers.
source_only: Interleaves comments containing source code. If the source code is no longer available then fromelf does not interleave that code.