bfin-xxx-gcc主控Makefile中all-host目标的生成

快乐虾 http://blog.csdn.net/lights_joy/ lights@hb165.com

本文适用于
gcc-4.3.1
configure –target=bfin-uclinux-gnu
Blackfin系列DSP
Cygwin gcc 3.4.4


欢迎转载，但请保留作者信息

1.1 all-host

这个目标将在生成all目标时生成。
.PHONY: all-host

all-host: maybe-all-ash #空目标
all-host: maybe-all-autoconf #空目标
all-host: maybe-all-automake #空目标
all-host: maybe-all-bash #空目标
all-host: maybe-all-bison #空目标
all-host: maybe-all-byacc #空目标
all-host: maybe-all-bzip2 #空目标
all-host: maybe-all-dejagnu #空目标
all-host: maybe-all-diff #空目标
all-host: maybe-all-dosutils #空目标
all-host: maybe-all-etc #空目标
all-host: maybe-all-fastjar #空目标
all-host: maybe-all-fileutils #空目标
all-host: maybe-all-findutils #空目标
all-host: maybe-all-find #空目标
all-host: maybe-all-fixincludes
all-host: maybe-all-flex #空目标
all-host: maybe-all-gcc
all-host: maybe-all-gawk #空目标
all-host: maybe-all-gettext #空目标
all-host: maybe-all-gnuserv #空目标
all-host: maybe-all-gprof #空目标
all-host: maybe-all-gzip #空目标
all-host: maybe-all-hello #空目标
all-host: maybe-all-indent #空目标
all-host: maybe-all-intl
all-host: maybe-all-tcl #空目标
all-host: maybe-all-itcl #空目标
all-host: maybe-all-libcpp
all-host: maybe-all-libdecnumber
all-host: maybe-all-libgui #空目标
all-host: maybe-all-libiberty
all-host: maybe-all-libtool #空目标
all-host: maybe-all-m4 #空目标
all-host: maybe-all-make #空目标
all-host: maybe-all-mmalloc #空目标
all-host: maybe-all-patch #空目标
all-host: maybe-all-perl #空目标
all-host: maybe-all-prms #空目标
all-host: maybe-all-rcs #空目标
all-host: maybe-all-readline #空目标
all-host: maybe-all-release #空目标
all-host: maybe-all-recode #空目标
all-host: maybe-all-sed #空目标
all-host: maybe-all-send-pr #空目标
all-host: maybe-all-shellutils #空目标
all-host: maybe-all-sid #空目标
all-host: maybe-all-sim #空目标
all-host: maybe-all-tar #空目标
all-host: maybe-all-texinfo #空目标
all-host: maybe-all-textutils #空目标
all-host: maybe-all-time #空目标
all-host: maybe-all-uudecode #空目标
all-host: maybe-all-wdiff #空目标
all-host: maybe-all-zip #空目标
all-host: maybe-all-zlib
all-host: maybe-all-gdb #空目标
all-host: maybe-all-expect #空目标
all-host: maybe-all-guile #空目标
all-host: maybe-all-tk #空目标
all-host: maybe-all-libtermcap #空目标
all-host: maybe-all-utils #空目标
all-host: maybe-all-gnattools #空目标

1.1.1 maybe-all-fixincludes

all-host目标的生成依赖于这个目标，而它的依赖关系定义为：
.PHONY: all-fixincludes maybe-all-fixincludes
maybe-all-fixincludes:
TARGET-fixincludes=all
maybe-all-fixincludes: all-fixincludes
即这个目标将依赖于all-fixincludes这个目标。

1.1.1.1 all-fixincludes

这个目标的依赖关系如下：
all-fixincludes: configure-fixincludes
@: $(MAKE); $(unstage)
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(HOST_EXPORTS) /
(cd $(HOST_SUBDIR)/fixincludes && /
$(MAKE) $(FLAGS_TO_PASS) $(TARGET-fixincludes))
再往下还有：
all-fixincludes: maybe-all-libiberty
因此这个目标将依赖于configure-fixincludes和maybe-all-libiberty，maybe-all-libiberty这个依赖关系将在host-i686-pc-cygwin/libiberty子目录下生成一个libiberty.a的库，而configure-fixincludes这个依赖关系将生成host-i686-pc-cygwin/fixincludes子目录并在此子目录下生成Makefile。
在上述两部分完成后，将进入host-i686-pc-cygwin/fixincludes子目录并在其中执行make操作，指定的生成目标$(TARGET-fixincludes)的值为all。
在make之后，将在host-i686-pc-cygwin/fixincludes目录下生成几个文件：
fixincl.exe
fixinc.sh
mkheaders
1.1.1.1.1 configure-fixincludes
可以认为这是一个最终目标：
.PHONY: configure-fixincludes maybe-configure-fixincludes
configure-fixincludes:
@: $(MAKE); $(unstage)
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(HOST_SUBDIR)/fixincludes/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(HOST_SUBDIR)/fixincludes ; /
$(HOST_EXPORTS) /
echo Configuring in $(HOST_SUBDIR)/fixincludes; /
cd "$(HOST_SUBDIR)/fixincludes" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(HOST_SUBDIR)/fixincludes/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/fixincludes"; /
libsrcdir="$$s/fixincludes"; /
$(SHELL) $${libsrcdir}/configure /
$(HOST_CONFIGARGS) --build=${build_alias} --host=${host_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
在这里HOST_SUBDIR定义为：
HOST_SUBDIR = host-i686-pc-cygwin
而HOST_EXPORTS则定义为：
# This is the list of variables to export in the environment when
# configuring subdirectories for the host system. We need to pass
# some to the GCC configure because of its hybrid host/target nature.
HOST_EXPORTS = /
$(BASE_EXPORTS) /
CC="$(CC)"; export CC; /
CFLAGS="$(CFLAGS)"; export CFLAGS; /
CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; /
CXX="$(CXX)"; export CXX; /
CXXFLAGS="$(CXXFLAGS)"; export CXXFLAGS; /
AR="$(AR)"; export AR; /
AS="$(AS)"; export AS; /
CC_FOR_BUILD="$(CC_FOR_BUILD)"; export CC_FOR_BUILD; /
DLLTOOL="$(DLLTOOL)"; export DLLTOOL; /
LD="$(LD)"; export LD; /
LDFLAGS="$(LDFLAGS)"; export LDFLAGS; /
NM="$(NM)"; export NM; /
RANLIB="$(RANLIB)"; export RANLIB; /
WINDRES="$(WINDRES)"; export WINDRES; /
WINDMC="$(WINDMC)"; export WINDMC; /
OBJCOPY="$(OBJCOPY)"; export OBJCOPY; /
OBJDUMP="$(OBJDUMP)"; export OBJDUMP; /
AR_FOR_TARGET="$(AR_FOR_TARGET)"; export AR_FOR_TARGET; /
AS_FOR_TARGET="$(AS_FOR_TARGET)"; export AS_FOR_TARGET; /
GCC_FOR_TARGET="$(GCC_FOR_TARGET)"; export GCC_FOR_TARGET; /
LD_FOR_TARGET="$(LD_FOR_TARGET)"; export LD_FOR_TARGET; /
NM_FOR_TARGET="$(NM_FOR_TARGET)"; export NM_FOR_TARGET; /
OBJDUMP_FOR_TARGET="$(OBJDUMP_FOR_TARGET)"; export OBJDUMP_FOR_TARGET; /
RANLIB_FOR_TARGET="$(RANLIB_FOR_TARGET)"; export RANLIB_FOR_TARGET; /
TOPLEVEL_CONFIGURE_ARGUMENTS="$(TOPLEVEL_CONFIGURE_ARGUMENTS)"; export TOPLEVEL_CONFIGURE_ARGUMENTS; /
GMPLIBS="$(HOST_GMPLIBS)"; export GMPLIBS; /
GMPINC="$(HOST_GMPINC)"; export GMPINC; /
$(RPATH_ENVVAR)=`echo "$(HOST_LIB_PATH)$$$(RPATH_ENVVAR)" | sed 's,::*,:,g;s,^:*,,;s,:*$$,,'`; export $(RPATH_ENVVAR);
因而这一段脚本执行后将创建一个叫做host-i686-pc-cygwin的子目录，并在此子目录下又建立一个fixincludes的子目录。
接下来将执行gcc-4.1.3/fixincludes/configure脚本，这个脚本将在host-i686-pc-cygwin/fixincludes下创建几个文件：
config.cache
config.h
config.log
config.status
Makefile
mkheaders.almost
stamp-h
1.1.1.1.2 maybe-all-libiberty
这个目标有如下依赖关系：
.PHONY: all-libiberty maybe-all-libiberty
maybe-all-libiberty:
TARGET-libiberty=all
maybe-all-libiberty: all-libiberty
即它将依赖于all-libiberty这个目标。
1.1.1.1.2.1 all-libiberty
这个目标有如下依赖关系：
all-libiberty: configure-libiberty
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(HOST_EXPORTS) /
(cd $(HOST_SUBDIR)/libiberty && /
$(MAKE) $(FLAGS_TO_PASS) $(TARGET-libiberty))
即此目标依赖于configure-libiberty，在configure-libiberty中将创建一个叫做host-i686-pc-cygwin/libiberty的子目录，接下来将执行gcc-4.1.3/libiberty/configure脚本，这个脚本将在host-i686-pc-cygwin/libiberty下创建几个用于make的文件。
而在实现此目标的脚本中，将直接进入host-i686-pc-cygwin/libiberty子目录并执行make操作。在这里TARGET-libiberty变量的值为：
TARGET-libiberty=all
因而make之后将在host-i686-pc-cygwin/libiberty子目录下生成一个libiberty.a文件。
对此Makefile的详细分析参见《gcc makefile研究-libiberty.doc》
1.1.1.1.2.1.1 configure-libiberty
这是一个最终目标，其执行的脚本如下：
configure-libiberty:
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(HOST_SUBDIR)/libiberty/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(HOST_SUBDIR)/libiberty ; /
$(HOST_EXPORTS) /
echo Configuring in $(HOST_SUBDIR)/libiberty; /
cd "$(HOST_SUBDIR)/libiberty" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(HOST_SUBDIR)/libiberty/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/libiberty"; /
libsrcdir="$$s/libiberty"; /
$(SHELL) $${libsrcdir}/configure /
$(HOST_CONFIGARGS) --build=${build_alias} --host=${host_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
在这里HOST_SUBDIR定义为：
HOST_SUBDIR = host-i686-pc-cygwin
因而这一段脚本执行后将创建一个叫做host-i686-pc-cygwin/libiberty的子目录，接下来将执行gcc-4.1.3/libiberty/configure脚本，这个脚本将在host-i686-pc-cygwin/libiberty下创建几个文件：
config.cache
config.h
config.log
config.status
Makefile
stamp-h
xhost-mkfrag
testsuite/Makefile

1.1.2 all-host: maybe-all-gcc

这个目标的依赖关系为：
.PHONY: all-gcc maybe-all-gcc
maybe-all-gcc:
TARGET-gcc=all
maybe-all-gcc: all-gcc
all-gcc: configure-gcc
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(HOST_EXPORTS) /
(cd $(HOST_SUBDIR)/gcc && /
$(MAKE) $(FLAGS_TO_PASS) $(EXTRA_GCC_FLAGS) $(TARGET-gcc))
all-gcc: all-libiberty
all-gcc: maybe-all-gmp #空目标
all-gcc: maybe-all-intl
all-gcc: maybe-all-mpfr #空目标
all-gcc: maybe-all-build-texinfo #空目标
all-gcc: maybe-all-build-bison #空目标
all-gcc: maybe-all-build-byacc #空目标
all-gcc: maybe-all-build-flex #空目标
all-gcc: maybe-all-build-libiberty
all-gcc: maybe-all-build-fixincludes
all-gcc: maybe-all-zlib
all-gcc: all-libcpp
all-gcc: all-libdecnumber
all-gcc: maybe-all-libiberty
all-gcc: maybe-all-fixincludes

即它依赖于configure-gcc，在configure-gcc中，它将创建host-i686-pc-cygwin/gcc子目录，并执行gcc-4.3.1/gcc/configure脚本，执行完这段脚本后，将在host-i686-pc-cygwin/gcc子目录下生成Makefile。
而在上面这段脚本中，就是进入host-i686-pc-cygwin/gcc子目录并进行make操作。这里比较重要的是传递进去的参数：
TARGET-gcc=all

1.1.2.1 configure-gcc

这个目标有如下依赖关系：
configure-gcc: maybe-configure-intl
configure-gcc: maybe-all-binutils #空目标
configure-gcc: maybe-all-gas #空目标
configure-gcc: maybe-all-ld #空目标
configure-gcc:
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(HOST_SUBDIR)/gcc/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(HOST_SUBDIR)/gcc ; /
$(HOST_EXPORTS) /
echo Configuring in $(HOST_SUBDIR)/gcc; /
cd "$(HOST_SUBDIR)/gcc" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(HOST_SUBDIR)/gcc/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/gcc"; /
libsrcdir="$$s/gcc"; /
$(SHELL) $${libsrcdir}/configure /
$(HOST_CONFIGARGS) --build=${build_alias} --host=${host_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
在maybe-configure-intl这个依赖项中，它将创建host-i686-pc-cygwin/intl子目录，并执行gcc-4.3.1/intl/configure脚本，执行完这段脚本后，将在host-i686-pc-cygwin/intl子目录下生成Makefile。
在这一段要执行的脚本中：
HOST_SUBDIR = host-i686-pc-cygwin
srcdir = .
HOST_CONFIGARGS = --cache-file=./config.cache '--enable-languages=c,c++,fortran,java,objc' --program-transform-name='s,^,bfin-uclinux-gnu-,'
build_alias=i686-pc-cygwin
target_alias=bfin-uclinux-gnu
所以这一段脚本将创建host-i686-pc-cygwin/gcc子目录，并执行gcc-4.3.1/gcc/configure脚本，执行完这段脚本后，将在host-i686-pc-cygwin/gcc子目录下生成以下几个文件：
.gdbinit
as
auto-host.h
collect-ld
config.cache
config.log
config.status
configargs.h
cstamp-h
gccbug
libaba-mk
Makefile
Make-hooks
nm
ada/Makefile
还创建了以下几个子目录：
build
cp
doc
fortran
java
objc
objcp
treelang

1.1.2.1.1 maybe-configure-intl
这个目标的依赖关系为：
.PHONY: configure-intl maybe-configure-intl
maybe-configure-intl:
maybe-configure-intl: configure-intl
configure-intl:
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(HOST_SUBDIR)/intl/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(HOST_SUBDIR)/intl ; /
$(HOST_EXPORTS) /
echo Configuring in $(HOST_SUBDIR)/intl; /
cd "$(HOST_SUBDIR)/intl" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(HOST_SUBDIR)/intl/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/intl"; /
libsrcdir="$$s/intl"; /
$(SHELL) $${libsrcdir}/configure /
$(HOST_CONFIGARGS) --build=${build_alias} --host=${host_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
在这一段要执行的脚本中：
HOST_SUBDIR = host-i686-pc-cygwin
srcdir = .
HOST_CONFIGARGS = --cache-file=./config.cache '--enable-languages=c,c++,fortran,java,objc' --program-transform-name='s,^,bfin-uclinux-gnu-,'
build_alias=i686-pc-cygwin
target_alias=bfin-uclinux-gnu
所以这一段脚本将创建host-i686-pc-cygwin/intl子目录，并执行gcc-4.3.1/intl/configure脚本，执行完这段脚本后，将在host-i686-pc-cygwin/intl子目录下生成以下几个文件：
config.cache
config.h
config.intl
config.log
config.status
Makefile

1.1.2.2 all-libiberty

这个目标在maybe-all-fixincludes目标中已经执行过了，它将进入host-i686-pc-cygwin/libiberty子目录并执行make操作并生成一个libiberty.a文件，由于此前已经执行过了，因此将略过此目标。

1.1.2.3 maybe-all-intl

这个目标的依赖定义为：
.PHONY: all-intl maybe-all-intl
maybe-all-intl:
TARGET-intl=all
maybe-all-intl: all-intl
all-intl: configure-intl
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(HOST_EXPORTS) /
(cd $(HOST_SUBDIR)/intl && /
$(MAKE) $(FLAGS_TO_PASS) $(TARGET-intl))
这个目标将依赖于configure-intl，而这个目标在configure-gcc时已经实现了，它将调用gcc-4.3.1/intl/configure脚本在host-i686-pc-cygwin/intl目录下生成Makefile等文件。
在上述这段脚本中，将进入host-i686-pc-cygwin/intl目录进行Make操作，要求生成的目标
TARGET-intl=all
实际上这个目标将什么也不做。

1.1.2.4 all-gcc: maybe-all-build-libiberty

这个目标的依赖关系为：
.PHONY: all-build-libiberty maybe-all-build-libiberty
maybe-all-build-libiberty:
TARGET-build-libiberty=all
maybe-all-build-libiberty: all-build-libiberty
all-build-libiberty: configure-build-libiberty
@: $(MAKE); $(unstage)
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(BUILD_EXPORTS) /
(cd $(BUILD_SUBDIR)/libiberty && /
$(MAKE) $(TARGET-build-libiberty))
这个目标依赖于configure-build-libiberty，而这个目标将创建一个叫build-i686-pc-cygwin/libiberty的子目录，并执行gcc-4.3.1/libiberty/下的configure脚本，此脚本将在build-i686-pc-cygwin/libiberty子目录下生成Makefile和其它几个文件。
在上述脚本中，将进入build-i686-pc-cygwin/libiberty这个子目录并执行make操作，其目标为：
TARGET-build-libiberty=all
因而make之后将在build-i686-pc-cygwin/libiberty子目录下生成一个libiberty.a文件。

1.1.2.4.1 configure-build-libiberty
这个目标定义为：
.PHONY: configure-build-libiberty maybe-configure-build-libiberty
maybe-configure-build-libiberty:
maybe-configure-build-libiberty: configure-build-libiberty
configure-build-libiberty:
@: $(MAKE); $(unstage)
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(BUILD_SUBDIR)/libiberty/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(BUILD_SUBDIR)/libiberty ; /
$(BUILD_EXPORTS) /
echo Configuring in $(BUILD_SUBDIR)/libiberty; /
cd "$(BUILD_SUBDIR)/libiberty" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(BUILD_SUBDIR)/libiberty/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/libiberty"; /
libsrcdir="$$s/libiberty"; /
rm -f no-such-file || : ; /
CONFIG_SITE=no-such-file $(SHELL) $${libsrcdir}/configure /
$(BUILD_CONFIGARGS) --build=${build_alias} --host=${build_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
在这里有：
BUILD_SUBDIR = build-i686-pc-cygwin
因此这段脚本将创建build-i686-pc-cygwin/libiberty子目录，并执行gcc-4.3.1/libiberty/下的configure脚本，此脚本将在build-i686-pc-cygwin/libiberty子目录下生成以下文件：
config.h
config.log
config.status
Makefile
stamp-h
xhost-mkfrag
testsuite/Makefile

1.1.2.5 maybe-all-build-fixincludes

这个依赖关系定义为：
.PHONY: all-build-fixincludes maybe-all-build-fixincludes
maybe-all-build-fixincludes:
TARGET-build-fixincludes=all
maybe-all-build-fixincludes: all-build-fixincludes
all-build-fixincludes: configure-build-fixincludes
@: $(MAKE); $(unstage)
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(BUILD_EXPORTS) /
(cd $(BUILD_SUBDIR)/fixincludes && /
$(MAKE) $(TARGET-build-fixincludes))
再往下还有：
all-build-fixincludes: maybe-all-build-libiberty
因此这个目标将依赖于configure-build-fixincludes和maybe-all-build-libiberty，maybe-all-build-libiberty这个依赖关系将在build-i686-pc-cygwin/libiberty子目录下生成一个libiberty.a的库，而configure-build-fixincludes这个依赖关系将生成build-i686-pc-cygwin/fixincludes子目录并在此子目录下生成Makefile。
在上述两部分完成后，将进入build-i686-pc-cygwin/fixincludes子目录并在其中执行make操作，指定的生成目标$(TARGET-build-fixincludes)的值为all。
在make之后，将在build-i686-pc-cygwin/fixincludes目录下生成几个文件：
fixincl.exe
fixinc.sh
mkheaders

1.1.2.5.1 configure-build-fixincludes
这个依赖关系定义为：
.PHONY: configure-build-fixincludes maybe-configure-build-fixincludes
maybe-configure-build-fixincludes:
maybe-configure-build-fixincludes: configure-build-fixincludes
configure-build-fixincludes:
@: $(MAKE); $(unstage)
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(BUILD_SUBDIR)/fixincludes/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(BUILD_SUBDIR)/fixincludes ; /
$(BUILD_EXPORTS) /
echo Configuring in $(BUILD_SUBDIR)/fixincludes; /
cd "$(BUILD_SUBDIR)/fixincludes" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(BUILD_SUBDIR)/fixincludes/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/fixincludes"; /
libsrcdir="$$s/fixincludes"; /
rm -f no-such-file || : ; /
CONFIG_SITE=no-such-file $(SHELL) $${libsrcdir}/configure /
$(BUILD_CONFIGARGS) --build=${build_alias} --host=${build_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
在这里有：
BUILD_SUBDIR = build-i686-pc-cygwin
因而这一段脚本执行后将创建一个叫做build-i686-pc-cygwin的子目录，并在此子目录下又建立一个fixincludes的子目录。
接下来将执行gcc-4.1.3/fixincludes/configure脚本，这个脚本将在build-i686-pc-cygwin/fixincludes下创建几个文件：
config.h
config.log
config.status
Makefile
mkheaders.almost
stamp-h

1.1.2.6 maybe-all-zlib

这个目标的依赖关系定义为：
.PHONY: all-zlib maybe-all-zlib
maybe-all-zlib:
TARGET-zlib=all
maybe-all-zlib: all-zlib
all-zlib: configure-zlib
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(HOST_EXPORTS) /
(cd $(HOST_SUBDIR)/zlib && /
$(MAKE) $(FLAGS_TO_PASS) $(TARGET-zlib))
这个目标依赖于cofigure-zlib，而configure-zlib目标将创建host-i686-pc-cygwin/zlib目录并在其中生成Makefile。
上述这段脚本将进入host-i686-pc-cygwin/zlib目录并执行make操作，最终在此子目录下生成一个libz.a的文件。

1.1.2.6.1 configure-zlib
这个目标的依赖关系为：
.PHONY: configure-zlib maybe-configure-zlib
maybe-configure-zlib:
maybe-configure-zlib: configure-zlib
configure-zlib:
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(HOST_SUBDIR)/zlib/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(HOST_SUBDIR)/zlib ; /
$(HOST_EXPORTS) /
echo Configuring in $(HOST_SUBDIR)/zlib; /
cd "$(HOST_SUBDIR)/zlib" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(HOST_SUBDIR)/zlib/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/zlib"; /
libsrcdir="$$s/zlib"; /
$(SHELL) $${libsrcdir}/configure /
$(HOST_CONFIGARGS) --build=${build_alias} --host=${host_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
这一段脚本创建host-i686-pc-cygwin/zlib子目录，然后将执行gcc-4.3.1/zlib/configure脚本，此脚本将在host-i686-pc-cygwin/zlib子目录下生成以下文件：
config.cache
config.log
config.status
libtool
Makefile

1.1.2.7 all-libcpp

这个目标的依赖关系定义为：
.PHONY: all-libcpp maybe-all-libcpp
maybe-all-libcpp:
TARGET-libcpp=all
maybe-all-libcpp: all-libcpp
all-libcpp: configure-libcpp
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(HOST_EXPORTS) /
(cd $(HOST_SUBDIR)/libcpp && /
$(MAKE) $(FLAGS_TO_PASS) $(TARGET-libcpp))
这个目标依赖于cofigure-libcpp，configure-libcpp目标将创建host-i686-pc-cygwin/libcpp目录并在其中生成Makefile。
上述这段脚本将进入host-i686-pc-cygwin/libcpp目录并执行make操作，最终在此子目录下生成libcpp.a和mekedepend.exe两个文件。

1.1.2.7.1 configure-libcpp
这个目标的依赖关系为：
.PHONY: configure-libcpp maybe-configure-libcpp
maybe-configure-libcpp:
maybe-configure-libcpp: configure-libcpp
configure-libcpp:
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(HOST_SUBDIR)/libcpp/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(HOST_SUBDIR)/libcpp ; /
$(HOST_EXPORTS) /
echo Configuring in $(HOST_SUBDIR)/libcpp; /
cd "$(HOST_SUBDIR)/libcpp" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(HOST_SUBDIR)/libcpp/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/libcpp"; /
libsrcdir="$$s/libcpp"; /
$(SHELL) $${libsrcdir}/configure /
$(HOST_CONFIGARGS) --build=${build_alias} --host=${host_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
这一段脚本创建host-i686-pc-cygwin/libcpp子目录，然后将执行gcc-4.3.1/libcpp/configure脚本，此脚本将在host-i686-pc-cygwin/libcpp子目录下生成以下文件：
config.cache
config.h
config.log
config.status
Makefile
stamp-h1

1.1.2.8 all-libdecnumber

这个目标的依赖关系定义为：
.PHONY: all-libdecnumber maybe-all-libdecnumber
maybe-all-libdecnumber:
TARGET-libdecnumber=all
maybe-all-libdecnumber: all-libdecnumber
all-libdecnumber: configure-libdecnumber
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
$(HOST_EXPORTS) /
(cd $(HOST_SUBDIR)/libdecnumber && /
$(MAKE) $(FLAGS_TO_PASS) $(TARGET-libdecnumber))
这个目标依赖于cofigure-libdecnumber，configure- libdecnumber目标将创建host-i686-pc-cygwin/ libdecnumber目录并在其中生成Makefile。
上述这段脚本将进入host-i686-pc-cygwin/ libdecnumber目录并执行make操作，最终在此子目录下生成libdecnumber.a和mekedepend.exe两个文件。

1.1.2.8.1 configure- libdecnumber
这个目标的依赖关系为：
.PHONY: configure-libdecnumber maybe-configure-libdecnumber
maybe-configure-libdecnumber:
maybe-configure-libdecnumber: configure-libdecnumber
configure-libdecnumber:
@r=`${PWD_COMMAND}`; export r; /
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; /
test ! -f $(HOST_SUBDIR)/libdecnumber/Makefile || exit 0; /
$(SHELL) $(srcdir)/mkinstalldirs $(HOST_SUBDIR)/libdecnumber ; /
$(HOST_EXPORTS) /
echo Configuring in $(HOST_SUBDIR)/libdecnumber; /
cd "$(HOST_SUBDIR)/libdecnumber" || exit 1; /
case $(srcdir) in /
/* | [A-Za-z]:[///]*) topdir=$(srcdir) ;; /
*) topdir=`echo $(HOST_SUBDIR)/libdecnumber/ | /
sed -e 's,/./,,g' -e 's,[^/]*/,../,g' `$(srcdir) ;; /
esac; /
srcdiroption="--srcdir=$${topdir}/libdecnumber"; /
libsrcdir="$$s/libdecnumber"; /
$(SHELL) $${libsrcdir}/configure /
$(HOST_CONFIGARGS) --build=${build_alias} --host=${host_alias} /
--target=${target_alias} $${srcdiroption} /
|| exit 1
这一段脚本创建host-i686-pc-cygwin/ libdecnumber子目录，然后将执行gcc-4.3.1/ libdecnumber /configure脚本，此脚本将在host-i686-pc-cygwin/ libdecnumber子目录下生成以下文件：
config.cache
config.h
config.log
config.status
gstdint.h
Makefile
stamp-h1

1.1.2.9 maybe-all-libiberty

这个目标在此前已经完成。

1.1.2.10 maybe-all-fixincludes

这个目标在此前已经完成。

1.1.3 all-host: maybe-all-intl

此目标之前已经生成，略过。

1.1.4 all-host: maybe-all-libcpp

此目标之前已经生成，略过。

1.1.5 all-host: maybe-all-libdecnumber

此目标之前已经生成，略过。

1.1.6 all-host: maybe-all-libiberty

此目标之前已经生成，略过。

1.1.7 all-host: maybe-all-zlib

此目标之前已经生成，略过。

参考资料

host-i686-pc-cygwin/libiberty/Makefile解析(2008-8-19)
host-i686-pc-cygwin/fixincludes/Makefile分析(2008-8-19)
host-i686-pc-cygwin/zlib/Makefile分析(2008-8-19)
host-i686-pc-cygwin/libcpp/Makefile分析(2008-8-19)
host-i686-pc-cygwin/libdecnumber/Makefile分析(2008-8-19)
bfin-xxx-gcc中cc1plus.exe的生成（2008-08-23）
bfin-xxx-gcc中fortran目标的生成(2008-8-24)
bfin-xxx-gcc中java目标的生成(2008-8-24)
bfin-xxx-gcc中objc目标的生成(2008-8-26)
bfin-xxx-gcc中collect2目标的生成(2008-8-26)