【CMake报错&解决】GDCM配置时报错

Could not find a package configuration file provided by "GDCM" with any of
  the following names:

    GDCMConfig.cmake
    gdcm-config.cmake

  Add the installation prefix of "GDCM" to CMAKE_PREFIX_PATH or set
  "GDCM_DIR" to a directory containing one of the above files.  If "GDCM"
  provides a separate development package or SDK, be sure it has been
  installed.

在ITK配置中，必须提供GDCMconfig.cmake所在目录的路径。
（同理适用于其他配置中找不到.camke文件的问题）

参考：使用GDCM配置的ITK的Cmake错误