/usr/lib/x86_64-linux-gnu/pkgconfig/wayland-egl.pc is in libegl1-mesa-dev 10.1.0-4ubuntu5.
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=${prefix}/include
Name: wayland-egl
Description: Mesa wayland-egl library
Version: 10.1.0
Requires: wayland-client
Libs: -L${libdir} -lwayland-egl
Cflags: -I${includedir}
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