错误现象：
cygwin下ct-ng build去编译crosstool-ng出现：
[ERROR] Build failed in step 'Extracting and patching toolchain components'
[ERROR] Error happened in '/opt/crosstool-ng/lib/ct-ng-1.9.3/scripts/functions' in function 'CT_DoExecLog' (line unknown, sorry)
[ERROR] called from '/opt/crosstool-ng/lib/ct-ng-1.9.3/scripts/functions' at line # 681 in function 'CT_Extract'
[ERROR] called from '/opt/crosstool-ng/lib/ct-ng-1.9.3/scripts/build/debug/300-gdb.sh' at line # 65 in function 'do_debug_gdb_extract'
[ERROR] called from '/opt/crosstool-ng/lib/ct-ng-1.9.3/scripts/build/debug.sh' at line # 28 in function 'do_debug_extract'
[ERROR] called from '/opt/crosstool-ng/lib/ct-ng-1.9.3/scripts/crosstool-NG.sh' at line # 569 in function 'main'
[ERROR] Look at '/home/CLi/develop/crosstool-ng/x-tools/arm-xscale-linux-gnueabi/build.log' for more info on this error.
[ERROR] (elapsed: 10:01.80)
[10:06] / /opt/crosstool-ng/bin/ct-ng:143: recipe for target `build' failed
make: *** [build] Error 2
原因：
此处遇到此问题的原因，好像是：
由于之前下载过程中，由于某种原因，比如网络不稳定等，而导致下载下来的源码包不是完整的
从而导致后续的解压和打补丁出错。
解决办法：
去确定，你当前正在处理，即正在解压和打包的是哪个软件包
然后去重新下载一个对应的，完整的无误的，该版本的软件包
放到对应的目录下即可。
比如：此处正在处理的是ncurses的5.7版本的源码包
对应的文件是：ncurses-5.7.tar.gz
所以去：
删除
crosstool-ng\crosstool-ng-1.9.3_build\targets\src
中的
.ncurses-5.7.extracting和ncurses-5.7.tar.gz删除
crosstool-ng\crosstool-ng-1.9.3_build\targets\tarballs
中的
ncurses-5.7.tar.gz拷贝最新的，你刚下载好的，确保是完整的
ncurses-5.7.tar.bz2到：crosstool-ng\crosstool-ng-1.9.3_build\targets\src
如果你遇到类似问题，参考上面的步骤，去试试，应该就可以解决此类问题了。
 |  |  |
| 5.2.1.1. scripts/unifdef.c:209:25: error: conflicting types for ‘getline' |  | 5.2.1.3. [libgcc/./_powisf2.o] Error 1，/tmp/cc7Xh6xp.s:21: Error: selected processor does not support ARM mode `fmsr s14,r0′ |
