/usr/share/doc/polyorb-doc/examples/corba/thread_pool_tester/Makefile.local is in polyorb-doc 2.11~20140418-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | ${current_dir}svc.idl-stamp: idlac_flags := -ir
${test_target}: ${current_dir}svc.idl-stamp
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