I'm using IP-Cores from the FPGA vendor (Lattice) and already included a 'black box library' for the usage of its components. Unfortunately I still get error messages e.g. within following code:
library xp2;configuration behav_xp2_tag_mem_con of xp2_tag_mem isfor behav_xp2_tag_mem forall:SSPIA useentity xp2.SSPIA(V);endfor;endfor;end behav_xp2_tag_mem_con;
The error messages are "Could not find declaration corresponding to 'SSPIA'." and "Could not find declaration corresponding to 'V'."