无法打开输入文件“optimized.lib” 编译osgEarth2.8+VS2013+CMake3.4.0在Release版本的问题

1>LINK : fatal error LNK1181: 无法打开输入文件“optimized.lib”

可以到http://forum.osgearth.org搜索相关帖子，gwaldron说这很可能是CMake3.0以上版本的问题：

Jun 24, 2016; 9:45pm

Re: Build error

I solved this problem like this:

CMake (3+) comes with a built-in FindZLIB.cmake library for locating the ZLib dependency. But it is introducing this problem. So I copied the old FindZLIB.cmake from the OSG distribution into osgEarth/CMakeModules, and the problem disappeared.

从OpenSceneGraph-3.4.0\CMakeModules拷贝一份FindZLIB.cmake放到D:\APICenter\OSG\osgEarth2.8.0\CMakeModules

并修改，将红框中的部分删除，即不使用CMake自带的FindZLIB.cmake。