This file is indexed.

/usr/lib/pkgconfig/swipl.pc is in swi-prolog-nox 5.10.4-3ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

PLBASE=${libdir}/swipl-5.10.4
PLARCH=amd64
PLLIBS=-lgmp -lrt -lreadline -lncurses -lm -lrt -ldl 
PLLIB=-lswipl
PLCFLAGS= -pthread -fPIC
PLLDFLAGS=-rdynamic -Wl,-Bsymbolic-functions -Wl,-z,relro -pthread
PLSOEXT=so

Name: pl
Description: ISO/Edinburgh-style Prolog compiler
Version: 5.10.4
Libs: -L${libdir}/swipl-5.10.4/lib/amd64 -lswipl
Cflags: -I${includedir}