binaries/gtk-2.22.1/lib/pkgconfig/libpng.pc

prefix=c:/devel/target/c01378aafb50980950f7e58bcd36fc40
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include/libpng14

Name: libpng
Description: Loads and saves PNG files
Version: 1.4.3
Libs: -L${libdir} -lpng14
Libs.private: -lz 
Cflags: -I${includedir}