gmt5: seems to link opportunistically to OpenBLAS

[petrrr]

After uninstalling OpenBLAS I see the following:

petr% sudo port -v rev-upgrade
--->  Scanning binaries for linking errors
Could not open /opt/local/lib/libopenblas-r1.dylib: Error opening or reading file (referenced from /opt/local/bin/gmt)
--->  Found 3 broken files, matching files to ports      
--->  Found 1 broken port, determining rebuild order
You can always run 'port rev-upgrade' again to fix errors.
The following ports will be rebuilt: gmt5 @5.4.4+gdal+nonfree+pcre
Continue? [Y/n]: 

But OpenBLAS is not a declared dependency