/usr/lib/x86_64-linux-gnu/pkgconfig/atspi-2.pc is in libatspi2.0-dev 2.18.3-4ubuntu1.
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=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
Name: atspi
Description: Accessibility Technology software library
Requires: dbus-1 glib-2.0
Version: 2.18.3
Libs: -L${libdir} -latspi
Cflags: -I${includedir}/at-spi-2.0
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