prefix=/usr/i686-w64-mingw32/sys-root/mingw
exec_prefix=${prefix}
libdir=${prefix}/lib
includedir=${prefix}/include/libpng15

Name: libpng
Description: Loads and saves PNG files
Version: 1.5.2
Libs: -L${libdir} -lpng15
Libs.private: -lz 
Cflags: -I${includedir}