/usr/ is in libpoppler-cpp-dev 0.18.4-1ubuntu3.2.
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..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/poppler-cpp.pc
/usr/lib/x86_64-linux-gnu/libpoppler-cpp.a
/usr/include/
/usr/include/poppler/
/usr/include/poppler/cpp/
/usr/include/poppler/cpp/poppler-font.h
/usr/include/poppler/cpp/poppler-global.h
/usr/include/poppler/cpp/poppler-page.h
/usr/include/poppler/cpp/poppler-toc.h
/usr/include/poppler/cpp/poppler-page-renderer.h
/usr/include/poppler/cpp/poppler-rectangle.h
/usr/include/poppler/cpp/poppler-page-transition.h
/usr/include/poppler/cpp/poppler-version.h
/usr/include/poppler/cpp/poppler-image.h
/usr/include/poppler/cpp/poppler-embedded-file.h
/usr/include/poppler/cpp/poppler-document.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libpoppler-cpp-dev/
/usr/share/doc/libpoppler-cpp-dev/copyright
/usr/lib/x86_64-linux-gnu/libpoppler-cpp.so
/usr/share/doc/libpoppler-cpp-dev/changelog.Debian.gz