/usr/lib/pkgconfig/assimp.pc is in libassimp-dev 2.0.863+dfsg-2.
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 | prefix=/usr
exec_prefix=/usr/bin
libdir=/usr/lib
includedir=/usr/include/assimp
Name: Assimp
Description: Import various well-known 3D model formats in an uniform manner.
Version: 2.0
Libs: -L${libdir} -lassimp
Cflags: -I${includedir}
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