I found that clang 9 (and previous versions) also generates non CU info in .debug_info with -gmlt:

GCC with -g1 produces extra information not necessary for stacktrace + file:line info production:

Some clarifications: our third-party management system stores a single version of .o and doesn't allow you to choose between flavors like a.full.o + a.line.o.

prebuilt .o with full debug info - (eg. prebuilt external third-party code managed by an *inflexible* tp management system).

Here's where we use aranges: instead of linearly scanning .debug_info you can jump to the correct CU DIE using info from .debug_aranges

Then how about -gmlt?

Sorry, I forgot I didn't submit comments.

simplify tests more

So the benefit is a smaller output size.

convert tabs to spaces, align comments, remove some noise from tests, add dwarf5 test

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add single-cu and multi-cu tests

Update to strip data from .debug_abbrev, .debug_info, .debug_aranges

Yes, I need help committing this.
Thank you very much! :)

Update test/ELF/undefined-opt.s to verify quoted symbol correctly unquoted