Quartus 綜合時出現問題

1. Critical Warning (332012): Synopsys Design Constraints File file not found: 'led_test.sdc'. A Synopsys Design Constraints File is required by the TimeQuest Timing Analyzer to get proper timing constraints. Without it, the Compiler will not properly optimize the design.

這個問題，一般情況下可以忽略，但是當你設置Tools 選項中的Options中的Massage中的Promote critical warning messages to error messages，打勾後，綜合編譯就會一直提示錯誤，使得編譯無法通過，無法往下進行。