/usr/lib/x86_64-linux-gnu/pkgconfig/poppler-cpp.pc is in libpoppler-cpp-dev 0.24.5-2ubuntu4.17.
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 13 | prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: poppler-cpp
Description: cpp backend for Poppler PDF rendering library
Version: 0.24.5
Requires:
Requires.private: poppler = 0.24.5
Libs: -L${libdir} -lpoppler-cpp
Cflags: -I${includedir}/poppler/cpp
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