/usr/lib/ is in libaunit3.7.2-dev 3.7.2-1+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ada/
/usr/lib/x86_64-linux-gnu/ada/adalib/
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/ada_containers-aunit_lists.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/ada_containers.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-assertions.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-memory-utils.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-memory.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-options.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-reporter-gnattest.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-reporter-text.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-reporter-xml.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-reporter.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-run.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-simple_test_cases.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-test_caller.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-test_cases.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-test_filters.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-test_fixtures.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-test_results.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-test_suites.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-tests.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit-time_measure.ali
/usr/lib/x86_64-linux-gnu/ada/adalib/aunit/aunit.ali
/usr/lib/x86_64-linux-gnu/libaunit.a
/usr/lib/x86_64-linux-gnu/libaunit.so