/usr/lib/x86_64-linux-gnu/pkgconfig/serf-1.pc is in libserf-dev 1.3.9-6.
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 12 13 | SERF_MAJOR_VERSION=1
prefix=/usr
exec_prefix=${prefix}
libdir=/usr/lib/x86_64-linux-gnu
includedir=${prefix}/include/serf-1
Name: serf
Description: HTTP client library
Version: 1.3.9
Requires.private: libssl libcrypto
Libs: -L${libdir} -lserf-${SERF_MAJOR_VERSION}
Libs.private: -L/usr/lib/x86_64-linux-gnu -laprutil-1 -L/usr/lib/x86_64-linux-gnu -lapr-1 -L/usr/lib/x86_64-linux-gnu/mit-krb5 -Wl,-Bsymbolic-functions -Wl,-z,relro -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lz
Cflags: -I${includedir}
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