Remove --enable-cxx, this option has been removed since version 8.1 and https://github.com/libvips/libvips/commit/346a9e70c0b096f84127449488e7dce6968d91c7 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>