lib/pkgconfig/zlib.pc

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

Name: zlib
Description: zlib compression library
Version: 1.2.5

Requires:
Libs: -L${libdir} -L${sharedlibdir} -lz
Cflags: -I${includedir}