/usr/lib/x86_64-linux-gnu/pkgconfig/libftdipp1.pc is in libftdipp1-dev 1.2-5build1.
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 | prefix=/usr
exec_prefix=/usr/bin
libdir=/usr/lib/x86_64-linux-gnu
includedir=/usr/include/libftdi1
Name: libftdipp1
Description: C++ wrapper for libftdi1
Requires: libftdi1
Version: 1.2
Libs: -L${libdir} -lftdipp1
Cflags: -I${includedir}
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