Atlas does not produce threaded libraries on Yosemite

[urilabob@…]

This reads almost like a direct resurrection of ticket 35683 and ticket 35594. In a new install of MacPorts, attempting to install octave eventually leads to an attempt to install qrupdate, which fails with :info:build -L/opt/local/lib -ltatlas -L/opt/local/lib -llapack :info:build ld: library not found for -ltatlas :info:build collect2: error: ld returned 1 exit status :info:build make[1]: * libqrupdate.dylib Error 1 (I originally encountered the same problem using the restore_ports script, so decided to do a clean install)

Following the reasoning of ticket 35594, I have run port -v configure atlas, which produced the attached output.