在用v2lvs 转成 .spi这个文件时 有报错: Warning: stage_one/U4 calls port VDD not declared in module XOR2X2M
Warning: stage_one/U4 calls port VSS not declared in module XOR2X2M
Warning: Multiple declarations of module BUFX2M in /home1/calibre/stage_one/PR_out/stage_one_lvs.v:1
Second declaration ignored