installing the Devel\gettext package should solve your problem. git-submodule requires that. Unfortunately this is not marked as dependency.
附apt-cyg工具：https://code.google.com/p/apt-cyg/
cygwin运行git submodule init出错error while loading shared libraries的解决
原文：http://www.cnblogs.com/wellbye/p/3969327.html