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.
sigh
read file to mem was using uint for length for historical reasons
and rename header and edvips as vipsheader and vipsedit remove mergeup and find_mosaic