CMake io2d 错误缺少 CAIRO_INCLUDE_DIRS CAIRO_LIBRARIES。

Question

我正试图按照这个链接上的步骤进行操作。https:/github.comcpp-io2dP0267_RefImplblobmasterBUILDING.md）来安装io2d。 安装io2d.然而，我得到一个错误信息后，我写的cmake ... ..:

C:\Users\walid\Desktop\Udacity_Nanodegree\RoutePlanningProject\build>cmake ..
-- Selecting Windows SDK version 10.0.17763.0 to target Windows 10.0.18362.
CMake Error at CMakeLists.txt:15 (find_package):
  By not providing "Findio2d.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "io2d", but
  CMake did not find one.

  Could not find a package configuration file provided by "io2d" with any of
  the following names:

    io2dConfig.cmake
    io2d-config.cmake

  Add the installation prefix of "io2d" to CMAKE_PREFIX_PATH or set
  "io2d_DIR" to a directory containing one of the above files.  If "io2d"
  provides a separate development package or SDK, be sure it has been
  installed.


-- Configuring incomplete, errors occurred!
See also "C:/Users/walid/Desktop/Udacity_Nanodegree/RoutePlanningProject/build/CMakeFiles/CMakeOutput.log".

因此我在StackOverflow上找到了这个建议：CMake第三方库安装

但我得到一个新的错误信息，这里是。

cmake --config Debug "-DCMAKE_BUILD_TYPE=Debug" ..
-- Selecting Windows SDK version 10.0.17763.0 to target Windows 10.0.18362.
Default IO2D backend was not specified, choosing automatically...
Found Windows, using CAIRO_WIN32.
-- Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
CMake Error at C:/CMake/cmake-3.17.3-win64-x64/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:164 (message):
  Could NOT find Cairo (missing: CAIRO_INCLUDE_DIRS CAIRO_LIBRARIES)
Call Stack (most recent call first):
  C:/CMake/cmake-3.17.3-win64-x64/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:445 (_FPHSA_FAILURE_MESSAGE)
  cmake/FindCairo.cmake:102 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  P0267_RefImpl/P0267_RefImpl/cairo/CMakeLists.txt:5 (find_package)

PS：我使用的是Windows，我安装了CMake，Make，g++和gcc。

下面是一张截图，证明我已经安装了Cairo。