【问题】
折腾：
【记录】Cygwin下用arm-xscale-linux-gnueabi交叉编译Linux内核
期间，解决了：
【已解决】Cygwin下配置Linux内核出错：Makefile:419: *** mixed implicit and normal rules. Stop.
后，又出现错误：
CLi@PC-CLI-1 ~/develop/kernel/linux-2.6.19.1 $ make whgs_defconfig HOSTCC scripts/basic/fixdep scripts/basic/fixdep.c: In function ‘parse_config_file’: scripts/basic/fixdep.c:242:4: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/fixdep.c: In function ‘parse_dep_file’: scripts/basic/fixdep.c:319:4: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/fixdep.c: In function ‘traps’: scripts/basic/fixdep.c:371:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] scripts/basic/fixdep.c:373:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] HOSTCC scripts/basic/docproc scripts/basic/docproc.c: In function ‘find_export_symbols’: scripts/basic/docproc.c:188:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:191:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:197:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:200:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c: In function ‘singfunc’: scripts/basic/docproc.c:267:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c: In function ‘parse_file’: scripts/basic/docproc.c:300:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:305:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:310:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:316:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:319:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] HOSTCC scripts/kconfig/conf.o scripts/kconfig/conf.c: In function ‘strip’: scripts/kconfig/conf.c:45:2: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/kconfig/conf.c:53:2: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/kconfig/conf.c: In function ‘conf_string’: scripts/kconfig/conf.c:174:20: warning: variable ‘help’ set but not used [-Wunused-but-set-variable] scripts/kconfig/conf.c: In function ‘conf_sym’: scripts/kconfig/conf.c:208:6: warning: variable ‘type’ set but not used [-Wunused-but-set-variable] scripts/kconfig/conf.c: In function ‘conf_choice’: scripts/kconfig/conf.c:368:4: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/kconfig/conf.c:283:6: warning: variable ‘type’ set but not used [-Wunused-but-set-variable] HOSTCC scripts/kconfig/kxgettext.o HOSTCC scripts/kconfig/zconf.tab.o In file included from scripts/kconfig/zconf.tab.c:2340:0: scripts/kconfig/confdata.c: In function ‘conf_expand_value’: scripts/kconfig/confdata.c:57:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/kconfig/confdata.c: In function ‘conf_read_simple’: scripts/kconfig/confdata.c:238:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/kconfig/confdata.c: In function ‘conf_split_config’: scripts/kconfig/confdata.c:608:4: warning: array subscript has type ‘char’ [-Wchar-subscripts] In file included from scripts/kconfig/zconf.tab.c:2343:0: scripts/kconfig/menu.c: In function ‘menu_add_prop’: scripts/kconfig/menu.c:131:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/kconfig/menu.c:133:4: warning: array subscript has type ‘char’ [-Wchar-subscripts] In file included from scripts/kconfig/zconf.tab.c:2338:0: scripts/kconfig/zconf.tab.c: At top level: scripts/kconfig/lex.zconf.c:1620:16: warning: ‘input’ defined but not used [-Wunused-function] HOSTLD scripts/kconfig/conf scripts/kconfig/conf.o:conf.c:(.text+0x1f): undefined reference to `libintl_gettext' scripts/kconfig/conf.o:conf.c:(.text+0x33): undefined reference to `libintl_gettext' scripts/kconfig/conf.o:conf.c:(.text+0x47): undefined reference to `libintl_gettext' scripts/kconfig/conf.o:conf.c:(.text+0xd56): undefined reference to `libintl_gettext' /usr/lib/gcc/i686-pc-cygwin/4.7.3/../../../../i686-pc-cygwin/bin/ld: scripts/kconfig/conf.o: bad reloc address 0x70 in section `.rdata' /usr/lib/gcc/i686-pc-cygwin/4.7.3/../../../../i686-pc-cygwin/bin/ld: final link failed: Invalid operation collect2: error: ld returned 1 exit status make[1]: *** [scripts/kconfig/conf] Error 1 make: *** [whgs_defconfig] Error 2 CLi@PC-CLI-1 ~/develop/kernel/linux-2.6.19.1 $
即：
| scripts/kconfig/conf.o:conf.c:(.text+0x1f): undefined reference to `libintl_gettext’ |
如图：
【解决过程】
1.看到：
Re: something goes wrong while compiling linux kernel under cygwin
说是需要重新编译gcc等内容。
如果是的话，那岂不是：
极其耗时，那么也就可以放在cygwin下编译linux内核了。
2.参考：
RE: _libintl_gettext missing while building Linux kernel
去尝试打上对应的补丁，看看是否有效：
结果此处的
linux-2.6.19.1\scripts\Makefile.host
和帖子里面的，还不太一样：
帖子里是：
# Create executable from a single .c file # host-csingle -> Executable quiet_cmd_host-csingle = HOSTCC $@ - cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(HOST_LOADLIBES) -o $@ $< + cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(HOST_LOADLIBES) \ + $(HOSTLOADLIBES_$(@F)) -o $@ $< $(host-csingle): %: %.c FORCE $(call if_changed_dep,host-csingle)
而自己此处的是：
# Create executable from a single .c file
# host-csingle -> Executable
quiet_cmd_host-csingle = HOSTCC $@
cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
$(host-csingle): %: %.c FORCE
$(call if_changed_dep,host-csingle)看起来，也不太好改。也不会改。也好像不需要改。
所以暂时不改。
3.再去看看：
kernel\linux-2.6.19.1\scripts\kconfig\Makefile
修改后为：
# ===========================================================================
# Local mods. This is for cygwin-hosted builds. Should be harmlessly
# superfluous on Linux platforms where libintl functionality is in glibc.
#ifeq (${OSTYPE},cygwin)
HOST_LOADLIBES := -lintl
#endif
# ===========================================================================
# Kernel configuration targets
# These targets are used from top-level makefile然后再重新配置试试，结果错误依旧：
CLi@PC-CLI-1 ~/develop/kernel/linux-2.6.19.1 $ make whgs_defconfig HOSTCC scripts/basic/docproc scripts/basic/docproc.c: In function ‘find_export_symbols’: scripts/basic/docproc.c:188:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:191:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:197:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:200:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c: In function ‘singfunc’: scripts/basic/docproc.c:267:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c: In function ‘parse_file’: scripts/basic/docproc.c:300:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:305:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:310:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:316:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] scripts/basic/docproc.c:319:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] HOSTLD scripts/kconfig/conf scripts/kconfig/conf.o:conf.c:(.text+0x1f): undefined reference to `libintl_gettext' scripts/kconfig/conf.o:conf.c:(.text+0x33): undefined reference to `libintl_gettext' scripts/kconfig/conf.o:conf.c:(.text+0x47): undefined reference to `libintl_gettext' scripts/kconfig/conf.o:conf.c:(.text+0xd56): undefined reference to `libintl_gettext' /usr/lib/gcc/i686-pc-cygwin/4.7.3/../../../../i686-pc-cygwin/bin/ld: scripts/kconfig/conf.o: bad reloc address 0x70 in section `.rdata' /usr/lib/gcc/i686-pc-cygwin/4.7.3/../../../../i686-pc-cygwin/bin/ld: final link failed: Invalid operation collect2: error: ld returned 1 exit status make[1]: *** [scripts/kconfig/conf] Error 1 make: *** [whgs_defconfig] Error 2
4.参考：
Buildroot compilation errors (libintl) in cygwin.
其好像是，加了上面那个-lintl后，就解决问题了。
而此处我没有解决。
然后看了看makefile，好像是hostcc去编译.o的时候，加上的此库。
所以，重新去clean一下：
CLi@PC-CLI-1 ~/develop/kernel/linux-2.6.19.1 $ make clean
再make一下试试，结果错误依旧。
5.参考：
Re: AW: crosstool 0.37 + gdb build fix for cygwin/windows
中的patch：
然后把makefile改为：
# ===========================================================================
# Local mods. This is for cygwin-hosted builds. Should be harmlessly
# superfluous on Linux platforms where libintl functionality is in glibc.
ifeq (${OSTYPE},cygwin)
HOST_LOADLIBES := -lintl
endif
# ===========================================================================
# Kernel configuration targets
# These targets are used from top-level makefile再去编译试试，结果错误依旧。
6.再去改为：
# ===========================================================================
# Local mods. This is for cygwin-hosted builds. Should be harmlessly
# superfluous on Linux platforms where libintl functionality is in glibc.
#ifeq (${OSTYPE},cygwin)
#HOST_LOADLIBES := -lintl
#endif
IS_CYGWIN=$(shell uname | grep -i cygwin > /dev/null 2>&1 && echo yes || echo no)
ifeq ($(IS_CYGWIN),yes)
HOST_LOADLIBES := -lintl
endif
# ===========================================================================
# Kernel configuration targets
# These targets are used from top-level makefile试试，结果错误依旧。
7.怀疑是否调用到该行了。所以故意改错为：
IS_CYGWIN=$(shell uname | grep -i cygwin > /dev/null 2>&1 && echo yes || echo no) ifeq ($(IS_CYGWIN),yes) HOST_LOADLIBES := -lxxxxx endif
然后运行看看是否出错，结果错误无任何变化，说明根本没有执行到这句。
8.然后把对应的配置，加到合适的位置：
# Use reursively expanded variables so we do not call gcc unless
# we really need to do so. (Do not call gcc as part of make mrproper)
HOST_EXTRACFLAGS = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags)
HOST_LOADLIBES = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC))
#ifeq (${OSTYPE},cygwin)
#HOST_LOADLIBES := -lintl
#endif
IS_CYGWIN=$(shell uname | grep -i cygwin > /dev/null 2>&1 && echo yes || echo no)
ifeq ($(IS_CYGWIN),yes)
HOST_LOADLIBES += -lintl
endif
HOST_EXTRACFLAGS += -DLOCALE
PHONY += $(obj)/dochecklxdialog
$(obj)/dochecklxdialog:
$(Q)$(CONFIG_SHELL) $(check-lxdialog) -check $(HOSTCC) $(HOST_LOADLIBES)
always := dochecklxdialog再运行看看效果，然后终于是可以解决此问题了，至少是可以找到对应的库函数了，可以正常ld了。
【总结】
在cygwin下，交叉编译kernel，结果出现：
| scripts/kconfig/conf.o:conf.c:(.text+0x1f): undefined reference to `libintl_gettext’ |
的错误的：
原因是：
当是cygwin时，缺少对应的-lintl的库。
解决办法是：
想办法，在makefile中，添加上对应库-lintl即可。
修改：
linux-2.6.19.1\scripts\kconfig\Makefile
改为：
# Use reursively expanded variables so we do not call gcc unless
# we really need to do so. (Do not call gcc as part of make mrproper)
HOST_EXTRACFLAGS = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags)
HOST_LOADLIBES = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC))
#ifeq (${OSTYPE},cygwin)
#HOST_LOADLIBES := -lintl
#endif
IS_CYGWIN=$(shell uname | grep -i cygwin > /dev/null 2>&1 && echo yes || echo no)
ifeq ($(IS_CYGWIN),yes)
HOST_LOADLIBES += -lintl
endif
HOST_EXTRACFLAGS += -DLOCALE
PHONY += $(obj)/dochecklxdialog
$(obj)/dochecklxdialog:
$(Q)$(CONFIG_SHELL) $(check-lxdialog) -check $(HOSTCC) $(HOST_LOADLIBES)
always := dochecklxdialog即可。
但是接着又出现，类似于之前的：
的错误：
【已解决】Cygwin下交叉编译内核在配置时出错：scripts/kconfig/conf: scripts/kconfig/conf: cannot execute binary file
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