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1.Pre-Processing£¨Ô¤´¦Àí£©
   gcc -E -o hello.i hello.c
   Ñ¡Ïî-E  Ê¹µÃ±àÒëÆ÷ÔÚÔ¤´¦Àí½áÊøÊ±Í£Ö¹±àÒë
   Ñ¡Ïî-o   Ö¸¶¨GCCµÄÊä³ö½á¹û
   .i/.ii       ¾­¹ýÔ¤´¦ÀíµÄC/C++Ô´³ÌÐò
2.Compiling£¨±àÒ룩
   gcc -S -o hello.s hello.i
   Ñ¡Ïî-S   Ê¹µÃ±àÒëÆ÷ÔÚ±àÒë½áÊø£¬½øÐлã±à֮ǰֹͣ±àÒë
   .s          »ã±àÓïÑÔÔ´³ÌÐò
3.Assembling (»ã±à)
   gcc -c hello.s hello.o
   Ñ¡Ïî-c     »ã±à½×¶Î½«»ã±à´úÂëתΪ¶þ½øÖÆÄ¿±ê´úÂë
4.Linking£¨Á´½Ó£©
   gcc hello.o -o hello
   ½«³ÌÐòÖÐÓõ½µÄ¿âº¯ÊýÈçprintfµÄʵÏÖ´ÓĬÈϵÄ·¾¶"/usr/lib/libc.so.6"Á´½Ó¹ýÀ´
   ÏÖÔÚ¼´¿ÉÔËÐпÉÖ´ÐÐÎļþhello 
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1.WallÀྯ¸æÌáʾ
   Õ¼GCC¾¯¸æÑ¡Ïî90%ÒÔÉÏ£¬½¨ÒéʹÓÃÑ¡Ïî-Wall£¬¼´´ò¿ªËùÓо¯¸æ£º
   gcc -Wall wrong.c -o wrong
2.·ÇWallÀྯ¸æÌáʾ
   "-ansi"   Ç¿ÖÆGCCÉú³ÉµÄ±ê×¼Óï·¨ËùÒªÇóµÄ¸æ¾¯ÐÅÏ¢£¬²¢²»±£Ö¤ËùÓÐûÓо¯¸æµÄ³ÌÐò¶¼ÊÇ·ûºÏANSI C±ê×¼
   ”-pedantic“ ÔÊÐí·¢³öANSI C±ê×¼ËùÁеÄÈ«²¿¾¯¸æÐÅÏ¢£¬±£Ö¤ËùÓÐûÓо¯¸æµÄ³ÌÐò¶¼ÊÇ·ûºÏANSI C±ê×¼
    gcc -pedantic wrong.c -o wrong
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