自动化建构系统，CMake 3.4.0 发布

CMake 是一个跨平台的自动化建构系统,它使用一个名为 CMakeLists.txt 的文件来描述构建过程,可以产生标准的构建文件,如 Unix 的 Makefile 或Windows Visual C++ 的 projects/workspaces 。文件 CMakeLists.txt 需要手工编写,也可以通过编写脚本进行半自动的生成。CMake 提供了比 autoconfig 更简洁的语法。

CMake 3.4.0 发布，该版本增加新的测试操作器用于 if() 命令，主要更新内容如下：

* The "if()" command learned a new "TEST" operator that evaluates to
  true if a given test name has been defined by the "add_test()"
  command.  See policy "CMP0064".

* The "install(DIRECTORY)" command "DESTINATION" option learned to
  support "generator expressions".

* The "install(FILES)" command "DESTINATION" option learned to
  support "generator expressions".

* CMake learned to honor "*.manifest" source files with MSVC tools.
  Manifest files named as sources of ".exe" and ".dll" targets will be
  merged with linker-generated manifests and embedded in the binary.

弃用的特性

* The "CMakeExpandImportedTargets" module is now documented as
  deprecated.  See module documentation for an explanation.

* The "CMAKE_USE_RELATIVE_PATHS" variable no longer has any effect.
  Previously it was partially implemented and unreliable.

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