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                            # 在命令行中取消宏定義

## 技巧

類似于`-D`選項，你可以使用`-U`選項在命令行中取消一個宏的定義，比如：

	$ gcc -U DEBUG macro.c

中間可以沒有空格：

	$ gcc -UDEBUG macro.c

詳情參見[gcc手冊](https://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html#Preprocessor-Options)

## 貢獻者

xmj


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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