/usr/ is in libsigc++-1.2-dev 1.2.7-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/sigc++-1.2/
/usr/lib/sigc++-1.2/include/
/usr/lib/
/usr/lib/libsigc-1.2.a
/usr/lib/libsigc-1.2.la
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/sigc++-1.2.pc
/usr/lib/sigc++-1.2/include/sigcconfig.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libsigc++-1.2-dev/
/usr/share/doc/libsigc++-1.2-dev/README
/usr/share/doc/libsigc++-1.2-dev/manual/
/usr/share/doc/libsigc++-1.2-dev/manual/ch02s04.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch02s02.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch04s02.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch03.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch02.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch04s03.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch04.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch05.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch01.html
/usr/share/doc/libsigc++-1.2-dev/manual/index.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch03s02.html
/usr/share/doc/libsigc++-1.2-dev/manual/ch02s03.html
/usr/share/doc/libsigc++-1.2-dev/examples/
/usr/share/doc/libsigc++-1.2-dev/examples/signals.cc
/usr/share/doc/libsigc++-1.2-dev/examples/nine.h.m4
/usr/share/doc/libsigc++-1.2-dev/examples/hello_world.cc
/usr/share/doc/libsigc++-1.2-dev/TODO
/usr/share/doc/libsigc++-1.2-dev/FAQ
/usr/share/doc/libsigc++-1.2-dev/IDEAS
/usr/share/doc/libsigc++-1.2-dev/copyright
/usr/include/
/usr/include/sigc++-1.2/
/usr/include/sigc++-1.2/sigc++/
/usr/include/sigc++-1.2/sigc++/bind.h
/usr/include/sigc++-1.2/sigc++/class_slot.h
/usr/include/sigc++-1.2/sigc++/object.h
/usr/include/sigc++-1.2/sigc++/adaptor.h
/usr/include/sigc++-1.2/sigc++/slot.h
/usr/include/sigc++-1.2/sigc++/hide.h
/usr/include/sigc++-1.2/sigc++/sigc++.h
/usr/include/sigc++-1.2/sigc++/object_slot.h
/usr/include/sigc++-1.2/sigc++/method_slot.h
/usr/include/sigc++-1.2/sigc++/marshal.h
/usr/include/sigc++-1.2/sigc++/trait.h
/usr/include/sigc++-1.2/sigc++/node.h
/usr/include/sigc++-1.2/sigc++/retype.h
/usr/include/sigc++-1.2/sigc++/bind_return.h
/usr/include/sigc++-1.2/sigc++/connection.h
/usr/include/sigc++-1.2/sigc++/retype_return.h
/usr/include/sigc++-1.2/sigc++/signal.h
/usr/include/sigc++-1.2/sigc++/macros/
/usr/include/sigc++-1.2/sigc++/macros/template.macros.m4
/usr/include/sigc++-1.2/sigc++/macros/slot.h.m4
/usr/include/sigc++-1.2/sigc++/macros/retype_return.h.m4
/usr/include/sigc++-1.2/sigc++/macros/method_slot.h.m4
/usr/include/sigc++-1.2/sigc++/macros/class_slot.h.m4
/usr/include/sigc++-1.2/sigc++/macros/retype.h.m4
/usr/include/sigc++-1.2/sigc++/macros/signal.h.m4
/usr/include/sigc++-1.2/sigc++/macros/hide.h.m4
/usr/include/sigc++-1.2/sigc++/macros/bind.h.m4
/usr/include/sigc++-1.2/sigc++/macros/bind_return.h.m4
/usr/include/sigc++-1.2/sigc++/macros/object_slot.h.m4
/usr/lib/libsigc-1.2.so
/usr/share/doc/libsigc++-1.2-dev/changelog.Debian.gz