You must now include vips7 support explicitly with #include <vips/vips7compat.h> in your code just after including `vips.h`. The old vips7 names, such as `Rect`, were starting to cause problems with other packages like opencv.
im_fastcor() im_spcor() im_gradcor() though gradcor we just deprecate, it's complex and hardly used ... rework later is anyone complains