On Thu, 16 Oct 2008, Chuck Robey wrote:

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> I was wondering, for FreeBSD images, is there a symbol that one could look for,
> to indicate if image had debug symbols? I know you could destroy that by just
> stripping, I just wanted to know if there is any way to definitely tell, short
> of firing up gdb and looking for info.


There's really three possibilities:

1. Image has no symbols
2. Image has only non-debug symbols (e.g. global functions and variables)
3. Image has debug symbols (e.g. line numbers, local variables)

strip(1) or gcc -s produces #1. gcc without -g produces #2. gcc -g
produces #3.

You can distinguish #1 because 'nm image' will give no output. nm and
objdump don't appear able to distinguish #2 and #3, but readelf -w will
give a bunch of output for #3 and none for #2.

Does that help?

--

Nate Eldredge
neldredge@math.ucsd.edu
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