解读makefile2.mht

对linux的makefile进行分析解读．

2em"><CCID_NOBR>=B6=FE=A1=A2Makefile=BD=E2=B6=C1:=20
                  =
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                  +=3D =
binfmt_elf.o=A3=A2=BA=CD=A3=A2subdir-$(CONFIG_EXT2_FS) +=3D=20
                  =
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=AB=B5=DDMAKEFILES=B1=E4=C1=BF=CD=EA=B3=C9=B5=C4=A1=A3MAKEFILES=CA=C7make=
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=D0=D0=C2=B5=C4Makefile=D6=AE=C7=B0=A3=ACmake=BB=E1=CA=D7=CF=C8=BC=D3=D4=D8=
MAKEFILES=CB=F9=D6=B8=B5=C4=CE=C4=BC=FE=A1=A3=D4=DA=D6=F7Makefile=D6=D0=CB=
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=DA=BA=CB=C5=E4=D6=C3=C1=CBCONFIG_MODVERSIONS=D6=AE=BA=F3=A3=ACmake=20
                  =
dep=B2=D9=D7=F7=BB=E1=D4=DAinclude/linux/modules/=C4=BF=C2=BC=CF=C2=CE=AA=
=B8=F7=BC=B6Makefile=D6=D0export-objs=B1=E4=C1=BF=CB=F9=B6=D4=D3=A6=B5=C4=
=D4=B4=CE=C4=BC=FE=C9=FA=B3=C9=C0=A9=D5=B9=C3=FB=CE=AA.ver=B5=C4=CE=C4=BC=
=FE=A1=A3<BR><BR>=C0=FD=C8=E7=B6=D4=D3=DAkernel/ksyms.c=A3=ACmake=D3=C3=D2=
=D4=CF=C2=C3=FC=C1=EE=C9=FA=B3=C9=B6=D4=D3=A6=B5=C4ksyms.ver=A3=BA<BR><BR=
>
                  <CENTER><CCID_NOBR>
                  <TABLE cellSpacing=3D0 borderColorDark=3D#ffffff =
cellPadding=3D2=20
                  width=3D400 align=3Dcenter borderColorLight=3Dblack =
border=3D1>
                    <TBODY>
                    <TR>
                      <TD class=3Dcode style=3D"FONT-SIZE: 9pt" =
bgColor=3D#e6e6e6><PRE><CCID_CODE>gcc -E -D__KERNEL__=20
-D__GENKSYMS__ ksyms.c=20
| /sbin/genksyms -k 2.4.1=20
&gt; =
ksyms.ver</CCID_CODE></PRE></TD></TR></TBODY></TABLE></CCID_NOBR></CENTER=
>
                  <P=20
                  style=3D"TEXT-INDENT: =
2em">-D__GENKSYMS__=B5=C4=D7=F7=D3=C3=CA=C7=CA=B9ksyms.c=D6=D0=B5=C4EXPOR=
T_SYMBOL=BA=EA=B2=BB=BD=F8=D0=D0=C0=A9=D5=B9=A1=A3genksyms=C3=FC=C1=EE=CA=
=B6=B1=F0EXPORT_SYMBOL()=D6=D0=B5=C4=BA=AF=CA=FD=C3=FB=BA=CD=B6=D4=D3=A6=B5=
=C4=D4=AD=D0=CD=A3=AC=D4=D9=B8=F9=BE=DD=C6=E4=D4=AD=D0=CD=BC=C6=CB=E3=B3=F6=
=B8=C3=BA=AF=CA=FD=B5=C4=B0=E6=B1=BE=BA=C5=A1=A3=C0=FD=C8=E7ksyms.c=D6=D0=
=D3=D0=D2=BB=D0=D0=A3=BA=20

                  <P style=3D"TEXT-INDENT: 2em">
                  <CENTER><CCID_NOBR>
                  <TABLE cellSpacing=3D0 borderColorDark=3D#ffffff =
cellPadding=3D2=20
                  width=3D400 align=3Dcenter borderColorLight=3Dblack =
border=3D1>
                    <TBODY>
                    <TR>
                      <TD class=3Dcode style=3D"FONT-SIZE: 9pt" =
bgColor=3D#e6e6e6><PRE><CCID_CODE>EXPORT_SYMBOL(kmalloc);</CCID_CODE></PR=
E></TD></TR></TBODY></TABLE></CCID_NOBR></CENTER>
                  <P style=3D"TEXT-INDENT: =
2em">kmalloc=D4=AD=D0=CD=CA=C7=A3=BA=20
                  <P style=3D"TEXT-INDENT: 2em">
                  <CENTER><CCID_NOBR>
                  <TABLE cellSpacing=3D0 borderColorDark=3D#ffffff =
cellPadding=3D2=20
                  width=3D400 align=3Dcenter borderColorLight=3Dblack =
border=3D1>
                    <TBODY>
                    <TR>
                      <TD class=3Dcode style=3D"FONT-SIZE: 9pt" =
bgColor=3D#e6e6e6><PRE><CCID_CODE>void *kmalloc(size_t, =
int);</CCID_CODE></PRE></TD></TR></TBODY></TABLE></CCID_NOBR></CENTER>
                  <P style=3D"TEXT-INDENT: =
2em">genksyms=B3=CC=D0=F2=B6=D4=D3=A6=B5=C4=CA=E4=B3=F6=CE=AA=A3=BA=20
                  <P style=3D"TEXT-INDENT: 2em">
                  <CENTER><CCID_NOBR>
                  <TABLE cellSpacing=3D0 borderColorDark=3D#ffffff =
cellPadding=3D2=20
                  width=3D400 align=3Dcenter borderColorLight=3Dblack =
border=3D1>
                    <TBODY>
                    <TR>
                      <TD class=3Dcode style=3D"FONT-SIZE: 9pt" =
bgColor=3D#e6e6e6><PRE><CCID_CODE>#define __ver_kmalloc 93d4cfe6=20
#define kmalloc =
_set_ver(kmalloc)</CCID_CODE></PRE></TD></TR></TBODY></TABLE></CCID_NOBR>=
</CENTER>
                  <P=20
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=F9=D3=D0=B5=C4.ver=CE=C4=BC=FE=BA=F3=A3=ACmake=BD=AB=D6=D8=BD=A8include/=
linux/modversions.h=CE=C4=BC=FE=A3=AC=CB=FC=B0=FC=BA=AC=D2=BB=CF=B5=C1=D0=
#include=D6=B8=C1=EE=D0=D0=C7=B6=C8=EB=B8=F7=B8=F6.ver=CE=C4=BC=FE=A1=A3 =


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-include=3Dlinux/modversion.h=20
                  =
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=A1=A3=20

                  <P style=3D"TEXT-INDENT: =
2em">=CB=C4=A1=A2Rules.make=B5=C4=D7=A2=CA=CD=20
                  <P style=3D"TEXT-INDENT: 2em">
                  <CENTER><CCID_NOBR>
                  <TABLE cellSpacing=3D0 borderColorDark=3D#ffffff =
cellPadding=3D2=20
                  width=3D400 align=3Dcenter borderColorLight=3Dblack =
border=3D1>
                    <TBODY>
                    <TR>
                      <TD class=3Dcode style=3D"FONT-SIZE: 9pt" =
bgColor=3D#e6e6e6><PRE><CCID_CODE>[code:1:974578564b]=20
#=20
# This file contains rules which are shared between multiple Makefiles.=20
#=20

#=20
# False targets.=20
#=20
# =20
.PHONY: dummy =20

#=20
# Special variables which should not be exported=20
#=20
# =
=C8=A1=CF=FB=D5=E2=D0=A9=B1=E4=C1=BF=CD=A8=B9=FD=BB=B7=BE=B3=CF=F2make=D7=
=D3=BD=F8=B3=CC=B4=AB=B5=DD=A1=A3=20
unexport EXTRA_AFLAGS=20
# as =B5=C4=BF=AA=B9=D8=20
unexport EXTRA_CFLAGS=20
# cc =B5=C4=BF=AA=B9=D8=20
unexport EXTRA_LDFLAGS=20
# ld =B5=C4=BF=AA=B9=D8=20
unexport EXTRA_ARFLAGS=20
# ar =B5=C4=BF=AA=B9=D8=20
unexport SUBDIRS=20
# =20
unexport SUB_DIRS=20
# =
=B1=E0=D2=EF=C4=DA=BA=CB=D0=E8=BD=F8=C8=EB=B5=C4=D7=D3=C4=BF=C2=BC=A3=AC
=B5=C8=D3=DAsubdir-y=20
unexport ALL_SUB_DIRS=20
# =CB=F9=D3=D0=B5=C4=D7=D3=C4=BF=C2=BC=20
unexport MOD_SUB_DIRS=20
# =B1=E0=D2=EF=C4=A3=BF=E9=D0=E8=BD=F8=C8=EB=B5=C4=D7=D3=C4=BF=C2=BC=20
unexport O_TARGET=20
# ld=BA=CF=B2=A2=B5=C4=CA=E4=B3=F6=B6=D4=CF=F3=20
unexport ALL_MOBJS
# =CB=F9=D3=D0=B5=C4=C4=A3=BF=E9=C3=FB=20

unexport obj-y=20
# =B1=E0=D2=EF=B3=C9=C4=DA=BA=CB=B5=C4=CE=C4=BC=FE=BC=AF=20
unexport obj-m=20
# =B1=E0=D2=EF=B3=C9=C4=A3=BF=E9=B5=C4=CE=C4=BC=FE=BC=AF=20
unexport obj-n=20
# =20
unexport obj-=20
# =20
unexport export-objs=20
# =D0=E8=BD=F8=D0=D0=B0=E6=B1=BE=B4=A6=C0=ED=B5=C4=CE=C4=BC=FE=BC=AF=20
unexport subdir-y=20
# =
=B1=E0=D2=EF=C4=DA=BA=CB=CB=F9=D0=E8=BD=F8=C8=EB=B5=C4=D7=D3=C4=BF=C2=BC =

unexport subdir-m=20
# =
=B1=E0=D2=EF=C4=A3=BF=E9=CB=F9=D0=E8=BD=F8=C8=EB=B5=C4=D7=D3=C4=BF=C2=BC =

unexport subdir-n=20
unexport subdir-=20

#=20
# Get things started.=20
#=20
first_rule: sub_dirs=20
$(MAKE) all_targets=20
# =
=D4=DA=C4=DA=BA=CB=B1=E0=D2=EF=D7=D3=C4=BF=C2=BC=D6=D0=B9=FD=C2=CB=B3=F6
=BF=C9=D2=D4=D7=F7=CE=AA=C4=A3=BF=E9=B5=C4=D7=D3=C4=BF=C2=BC=A1=A3=20
both-m         =20
:=3D $(filter $(mod-subdirs),=20
$(subdir-y)) =20
SUB_DIRS :=3D $(subdir-y)=20
# =C7=F3=B3=F6=D7=DC=C4=A3=BF=E9=D7=D3=C4=BF=C2=BC=20
MOD_SUB_DIRS :=3D=20
$(sort $(subdir-m)
$(both-m))=20
# =C7=F3=B3=F6=D7=DC=D7=D3=C4=BF=C2=BC=20
ALL_SUB_DIRS :=3D $(sort=20
$(subdir-y) $(subdir-m)
$(subdir-n) $(subdir-))=20
#=20
# Common rules=20
#=20
# =
=BD=ABc=CE=C4=BC=FE=B1=E0=D2=EF=B3=C9=BB=E3=B1=E0=CE=C4=BC=FE=B5=C4=B9=E6=
=D4=F2=A3=AC
$@=CE=AA=C4=BF=B1=EA=B6=D4=CF=F3=A1=A3=20
%.s: %.c=20
$(CC) $(CFLAGS)
$(EXTRA_CFLAGS) $(CFLAGS_$@)
-S $&lt; -o $@=20
# =
=BD=ABc=CE=C4=BC=FE=C9=FA=B3=C9=D4=A4=B4=A6=C0=ED=CE=C4=BC=FE=B5=C4=B9=E6=
=D4=F2=A1=A3=20
%.i: %.c=20
$(CPP) $(CFLAGS) $(EXTRA_CFLAGS)=20
$(CFLAGS_$@) $&lt; &gt; $@=20
# =
=BD=ABc=CE=C4=BC=FE=B1=E0=D2=EF=B3=C9=C4=BF=B1=EA=CE=C4=BC=FE=B5=C4=B9=E6=
=D4=F2=A3=AC
$&lt;=CE=AA=B5=DA=D2=BB=B8=F6=CB=F9=D2=C0=C0=B5=B5=C4=B6=D4=CF=F3=A3=BB=20
#=20
=D4=DA=C4=BF=B1=EA=CE=C4=BC=FE=B5=C4=C4=BF=C2=BC=CF=C2=C9=FA=B3=C9flags=CE=
=C4=BC=FE=A3=AC
strip=C9=BE=B3=FD=B6=E0=D3=E0=B5=C4=BF=D5=B8=F1=A3=AC
subst=BD=AB=B6=BA=BA=C5=CC=E6=BB=BB=B3=C9=C3=B0=BA=C5=20
=A1=A3=20
%.o: %.c=20
$(CC) $(CFLAGS)=20
$(EXTRA_CFLAGS)=20
$(CFLAGS_$@) -c -o $@ $&lt;=20
@ ( \=20
    echo 'ifeq=20
	($(strip $(subst $(comma),:,
	$(CFLAGS) $(EXTRA_CFLAGS)=20
$(CFLAGS_$@))),
$$(strip $$(subst=20
$$(comma),:,$$(CFLAGS)
$$(EXTRA_CFLAGS)=20
$$(CFLAGS_$@))))' ; \=20
    echo '
	FILES_FLAGS_UP_TO_DATE +=3D $@' ;
	\=20
    echo '
	endif'=20
	\=20
) &gt; $(dir $@)/.$(notdir $@).flags=20
# =
=BB=E3=B1=E0=CE=C4=BC=FE=C9=FA=B3=C9=C4=BF=B1=EA=CE=C4=BC=FE=B5=C4=B9=E6=D4=
=F2=A1=A3=20
%.o: %.s=20
$(AS) $(AFLAGS)=20
$(EXTRA_CFLAGS) -o $@ $&lt;=20

# Old makefiles define
their own rules for compiling .S files,=20
# but these standard
rules are available
for any Makefile that=20
# wants to use them.=20
Our plan is to incrementally convert all=20
# the Makefiles=20
to these standard rules.  -- rmk, mec=20

ifdef USE_STANDARD_AS_RULE=20
# =
=BB=E3=B1=E0=CE=C4=BC=FE=C9=FA=B3=C9=D4=A4=B4=A6=C0=ED=CE=C4=BC=FE=B5=C4=B1=
=EA=D7=BC=B9=E6=D4=F2=A1=A3=20
%.s: %.S=20
$(CPP) $(AFLAGS)
$(EXTRA_AFLAGS)=20
$(AFLAGS_$@) $&lt; &gt; $@=20
# =
=BB=E3=B1=E0=CE=C4=BC=FE=C9=FA=B3=C9=C4=BF=B1=EA=CE=C4=BC=FE=B5=C4=B1=EA=D7=
=BC=B9=E6=D4=F2=A1=A3=20
%.o: %.S=20
$(CC) $(AFLAGS)
$(EXTRA_AFLAGS)=20
$(AFLAGS_$@) -c -o $@ $&lt;=20

endif=20
# =
c=CE=C4=BC=FE=C9=FA=