/usr/lib/x86_64-linux-gnu/pkgconfig/roslib.pc is in libroslib-dev 1.13.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Name: roslib
Description: Description of roslib
Version: 1.13.4
Cflags:
Libs: -lroslib
Requires:
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