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 À´Ô´linux-2.6.20.21/Documentation/kbuild/makefiles.txt
*  obj-y
+= foo.o ±íʾ±àbuild-in£¬obj-m += foo.o±íʾ±à³Émodule.
* kbuild
»á±àÒëËùÓеÄ$(obj-y)Îļþ£¬È»ºóµ÷ÓÃ$(LD) -r°ÑÕâЩÎļþºÏ²¢µ½Ò»¸öbuilt-in.oÎļþÖС£Õâ¸öbuilt-in.oÉÔºó»á±»¸¸¼¶Makefile linkµ½vmlinux
* ÓÃlib-y
:= checksum.o delay.o »á°Ñchecksum.oºÍdelay.oºÏ±à³ÉÒ»¸ölib.a
* obj-$(CONFIG_EXT2_FS) += ext2
/±íʾ£¬µ±CONFIG_EXT2_FS=yµÄʱºò£¬ÒªÅܵ½ext2/Ŀ¼Ï²¢make
* EXTRA_CFLAGS, EXTRA_AFLAGS, EXTRA_LDFLAGS, EXTRA_ARFLAGS
 EXTRA_CFLAGS
ÊÇÔÚÓÃCC±àÒëC´úÂëµÄʱºò¼ÓflagµÄ,
 EXTRA_AFLAGSÊÇÔÚ±àÒë»ã±àÓïÑÔµÄʱºò¼ÓflagÓõÄ,
 EXTRA_LDFLAGSÊÇÔÚLDµÄʱºò¼ÓflagÓõÄ,
 EXTRA_ARFLAGSÊÇÔÚARµÄʱºò¼ÓflagÓõÄ
* CFLAGS_aha152x.o
= -DAHA152X_STAT -DAUTOCONF±íʾֻÔÚ±àÒëaha152x.oµÄʱºò¼Ó -DAHA152X_STAT -DAUTOCONF
* AFLAGS_head-armv.o := -DTEXTADDR=$(TEXTADDR) -traditionalºÍÉÏÃæ²î²»¶à£¬±íʾÔÚ±àÒëÌØ¶¨»ã±àÎļþʱ¼Óflag
* $(src)
ÊÇMakefileËùÔÚĿ¼µÄÏà¶Ô·¾¶
* $(obj
)ÊÇÄ¿±êÎļþ±£´æÔÚµÄĿ¼µÄÏà¶Ô·¾¶
*
cflags-y += $(call
cc-option
,-march=pentium-mmx,-march=i586)±íʾ£¬Èç¹û$(CC)Ö§³ÖµÄ»°£¬-march=pentium-
mmx»á¼Ó¸øcflags-y£¬²»Ö§³ÖµÄ»°¾Í¼Ó-march=i586¡£»¹ÓÐһЩas-option,ld-option,µÈµÈ£¬»ù±¾Ô­Àí¶¼Ò»Ñù
* Òª±àÔÚ±¾µØ»úÉÏÖ±½Ó¿ÉÒÔÅܵijÌÐòÓÃhostprogs,ÀýÈçhostprogs-y
:= bin2hex±íʾ°Ñµ±Ç°Ä¿Â¼ÏµÄbin2hex.c±àÒë³ÉÒ»¸ö¿ÉÖ´ÐÐÎļþ£¨Host Program£©
* ÔÚÒ»¸ö¿ÉÖ´ÐÐÎļþÖÐlinkÆäËûÄ¿±êÎļþµÄ°ì·¨£º
#scripts/lxdialog/Makefile
        hostprogs-y   := lxdialog
        lxdialog-objs := checklist.o lxdialog.o
±íʾchecklist.cºÍlxdialog.c¶¼»á±»±àÒëÇÒ»áÔÚºóÃæºÏ²¢³ÉlxdialogÕâ¸ö¿ÉÖ´ÐÐÎļþ
* »¹ÓÐÆäËû½²host programµÄ£¬ÂÔ¹ý
* make clean
»á×Ô¼ºÉè±ðһЩÎļþ²¢Çå³ý¡£ÊÖ¹¤Ö¸¶¨Çå³ýµÄ°ì·¨
£º
        clean-files := devlist.h classlist.h±íʾָ¶¨É¾³ýÕâÁ½¸öÎļþ
        clean-dirs := $(objtree)/debian/±íʾɾ³ýÕâ¸öĿ¼¼°×ÓĿ¼
        subdir- := compressed/±íʾ¸æËß»


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