When you rebuild a project , individual units are not recompiled unless their source ( . pas ) files have changed since the last compilation , or their . dcu ( windows ) . dcu / . dpu ( linux ) files cannot be found , or you explicitly tell the compiler to reprocess them 當(dāng)你重建一個(gè)項(xiàng)目時(shí),單元文件將不會(huì)被重新編譯,除非他們的源文件在上次編譯后改變了,或者編譯后文件找不到了,或者你顯式地告訴編譯器重新生成它們。