FAQ : SZ410-U00で"ERROR:Place:645 - A clock IOB clock component is not placed at an optimal clock"が発生します

EDKで次のようなエラーメッセージが表示されます。

"ERROR:Place:645 - A clock IOB clock component is not placed at an optimal clock IOB site. 
The clock IOB component  is placed at site . The clock IO site can use the fast 
path between the IO and the Clock buffer/GCLK if the IOB is placed in the master Clock IOB 
Site. If this sub optimal condition is acceptable for this design you may set the 
environment variable XIL_PLACE_ALLOW_LOCAL_BUFG_ROUTING to demote this message to a WARNING 
and allow your design to continue."

XIL_PLACE_ALLOW_LOCAL_BUFG_ROUTING 環境変数を設定してください。エラーが警告に変わります。

• Windowsの場合

  
  SET XIL_PLACE_ALLOW_LOCAL_BUFG_ROUTING=1
  

• Linuxの場合(bash系)

  
  export XIL_PLACE_ALLOW_LOCAL_BUFG_ROUTING=1
  

• Linuxの場合(csh系)

  
  setenv XIL_PLACE_ALLOW_LOCAL_BUFG_ROUTING 1
  

詳細につきましてはXilinx社のアンサーデータベース21724をご参照ください。