在vs2008下使用cygwin（2）：i686-pc-cygwin/newlib/Makefile分析

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#makefile #compiler #command #脚本 #variables #list

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本文适用于

Cygwin-1.16

Vs2008

欢迎转载，但请保留作者信息

这个文件由主控Makefile调用newlib/configure脚本生成。并在主控Makefile中使用make all进行调用。

1.1 all

all目标定义为：

all: newlib.h

$(MAKE) $(AM_MAKEFLAGS) all-recursive

它所依赖的文件newlib.h已经由configure脚本生成，因此转向执行all-recursive目标：

all-recursive: stmp-targ-include

all-recursive: all-multi

此外还有：

RECURSIVE_TARGETS = all-recursive check-recursive dvi-recursive /

html-recursive info-recursive install-data-recursive /

install-exec-recursive install-info-recursive /

install-recursive installcheck-recursive installdirs-recursive /

pdf-recursive ps-recursive uninstall-info-recursive /

uninstall-recursive

# This directory's subdirectories are mostly independent; you can cd

# into them and run `make' without going through this Makefile.

# To change the values of `make' variables: instead of editing Makefiles,

# (1) if the variable is set in `config.status', edit `config.status'

# (which will cause the Makefiles to be regenerated when you run `make');

# (2) otherwise, pass the desired values on the `make' command line.

$(RECURSIVE_TARGETS):

@failcom='exit 1'; /

for f in x $$MAKEFLAGS; do /

case $$f in /

*=* | --[!k]*);; /

*k*) failcom='fail=yes';; /

esac; /

done; /

dot_seen=no; /

target=`echo $@ | sed s/-recursive//`; /

list='$(SUBDIRS)'; for subdir in $$list; do /

echo "Making $$target in $$subdir"; /

if test "$$subdir" = "."; then /

dot_seen=yes; /

local_target="$$target-am"; /

else /

local_target="$$target"; /

fi; /

(cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) $$local_target) /

|| eval $$failcom; /

done; /

if test "$$dot_seen" = "no"; then /

$(MAKE) $(AM_MAKEFLAGS) "$$target-am" || exit 1; /

fi; test -z "$$fail"

上述脚本将进入各个子目录执行make all，然后在当前目录下执行make all-am。

1.1.1 stmp-targ-include

这条规则定义为：

# The targ-include directory just holds the includes files for the

# particular system and machine we have been configured for. It is

# used while building.

stmp-targ-include: config.status

-rm -rf targ-include stmp-targ-include

mkdir targ-include targ-include/sys targ-include/machine targ-include/bits

cp newlib.h targ-include/newlib.h

-for i in $(srcdir)/libc/machine/$(machine_dir)/machine/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/machine/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/machine/$(machine_dir)/sys/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/sys/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/machine/$(machine_dir)/include/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/sys/$(sys_dir)/include/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/sys/$(sys_dir)/sys/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/sys/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/sys/$(sys_dir)/bits/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/bits/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/sys/$(sys_dir)/machine/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/machine/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/sys/$(sys_dir)/machine/$(machine_dir)/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/machine/`basename $$i`; /

else true; fi ; /

done

-for i in $(srcdir)/libc/sys/$(sys_dir)/machine/$(machine_dir)/include/*.h; do /

if [ -f $$i ]; then /

cp $$i targ-include/machine/`basename $$i`; /

else true; fi ; /

done

touch $@

这段脚本将创建targ-include子目录，并在其中复制一些头文件：

驱动器 C 中的卷是 XP

卷的序列号是 2855 -11F 6

C:/cygwin/src/cygwin/winsup/src/i686-pc-cygwin/newlib/targ-include 的目录

2008-10-08 11:48 <DIR> .

2008-10-08 11:48 <DIR> ..

2008-10-08 11:48 <DIR> sys

2008-10-08 11:48 <DIR> machine

2008-10-08 11:48 <DIR> bits

2008-10-08 11:48 5,744 newlib.h

1 个文件 5,744 字节

C:/cygwin/src/cygwin/winsup/src/i686-pc-cygwin/newlib/targ-include/sys 的目录

2008-10-08 11:48 <DIR> .

2008-10-08 11:48 <DIR> ..

0 个文件 0 字节

C:/cygwin/src/cygwin/winsup/src/i686-pc-cygwin/newlib/targ-include/machine 的目录

2008-10-08 11:48 <DIR> .

2008-10-08 11:48 <DIR> ..

2008-10-08 11:48 4,084 fastmath.h

1 个文件 4,084 字节

C:/cygwin/src/cygwin/winsup/src/i686-pc-cygwin/newlib/targ-include/bits 的目录

2008-10-08 11:48 <DIR> .

2008-10-08 11:48 <DIR> ..

0 个文件 0 字节

所列文件总数:

2 个文件 9,828 字节

11 个目录 15,119,286,272 可用字节

最后生成一个stmp-targ-include的空文件供Makefile做时间比较。

1.1.2 all-multi

这条规则定义为：

all-multi:

$(MULTIDO) $(AM_MAKEFLAGS) DO=all multi-do # $(MAKE)

因为此时传递进来的目标为all-recursive，因此转向执行multi-do：

multi-do:

if [ -z "$(MULTIDIRS)" ]; then /

true; /

else /

rootpre=`${PWD_COMMAND}`/; export rootpre; /

srcrootpre=`cd $(srcdir); ${PWD_COMMAND}`/; export srcrootpre; /

lib=`echo "$${rootpre}" | sed -e 's,^.*//([^/][^/]*/)/$$,/1,'`; /

compiler="$(CC)"; /

for i in `$${compiler} --print-multi-lib 2>/dev/null`; do /

dir=`echo $$i | sed -e 's/;.*$$//'`; /

if [ "$${dir}" = "." ]; then /

true; /

else /

if [ -d ../$${dir}/$${lib} ]; then /

flags=`echo $$i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; /

if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) /

CFLAGS="$(CFLAGS) $${flags}" /

CCASFLAGS="$(CCASFLAGS) $${flags}" /

FCFLAGS="$(FCFLAGS) $${flags}" /

FFLAGS="$(FFLAGS) $${flags}" /

ADAFLAGS="$(ADAFLAGS) $${flags}" /

prefix="$(prefix)" /

exec_prefix="$(exec_prefix)" /

GCJFLAGS="$(GCJFLAGS) $${flags}" /

CXXFLAGS="$(CXXFLAGS) $${flags}" /

LIBCFLAGS="$(LIBCFLAGS) $${flags}" /

LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" /

LDFLAGS="$(LDFLAGS) $${flags}" /

MULTIFLAGS="$${flags}" /

DESTDIR="$(DESTDIR)" /

INSTALL="$(INSTALL)" /

INSTALL_DATA="$(INSTALL_DATA)" /

INSTALL_PROGRAM="$(INSTALL_PROGRAM)" /

INSTALL_SCRIPT="$(INSTALL_SCRIPT)" /

$(DO)); then /

true; /

else /

exit 1; /

fi; /

else true; /

fi; /

done; /

fi;/

这段脚本其实啥也不做。

1.2 all-am

这个目标定义为：

all-am: Makefile $(LIBRARIES) $(LTLIBRARIES) $(DATA) newlib.h

LIBRARIES = $(toollib_LIBRARIES)

toollib_LIBRARIES = libm.a libc.a

LTLIBRARIES = $(toollib_LTLIBRARIES)

toollib_LTLIBRARIES未定义

DATA = $(noinst_DATA) $(toollib_DATA)

noinst_DATA = stmp-targ-include

toollib_DATA = $(CRT0) $(CRT1)

CRT0 =

CRT1 =

参考资料

在vs2008下使用cygwin（1）：前言( 2008-10-16 )