src/exif.cpp:703:24: error: default initialization of an object of const type 'class Exiv2::IptcData const' requires a user-provided default constructor const IptcData emptyIptc; ^ src/exif.cpp:704:24: error: default initialization of an object of const type 'class Exiv2::XmpData const' requires a user-provided default constructor const XmpData emptyXmp; ^ src/exif.cpp:889:31: error: default initialization of an object of const type 'Exiv2::IptcData const' requires a user-provided default constructor const Exiv2::IptcData emptyIptc; ^ src/exif.cpp:890:31: error: default initialization of an object of const type 'Exiv2::XmpData const' requires a user-provided default constructor const Exiv2::XmpData emptyXmp; ^ src/preview.cpp:650:24: error: default initialization of an object of const type 'class Exiv2::IptcData const' requires a user-provided default constructor const IptcData emptyIptc; ^ src/preview.cpp:651:24: error: default initialization of an object of const type 'class Exiv2::XmpData const' requires a user-provided default constructor const XmpData emptyXmp; ^