[Bug gprofng/32892] source line level information not available with "-g -O2"

[vladimir.mezentsev at oracle dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=32892

--- Comment #8 from Vladimir Mezentsev <vladimir.mezentsev at oracle dot com> 
---
In my build g++ generates Dwarf-4.
In the attached gperf, g++ generated Dwarf-5.
For DW_AT_ranges gprofng tries to read the .debug_ranges section, which is
missing.

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