/usr/lib/pkgconfig/libdpkg.pc is in libdpkg-dev 1.17.5ubuntu5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include
pkglibdir=@pkglibdir@
Name: libdpkg
Description: Debian package management system library
Version: 1.17.5
Libs: -L${libdir} -ldpkg
Libs.private: -lz -llzma -lbz2
Cflags: -I${includedir}
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