message: mpfr is not detected on appveyor
diff: @@ -55,7 +55,7 @@ install:
  build_script:
  - mkdir build
  - cd build
  - - cmake -G "Visual Studio 15 2017 Win64" %CMAKE_FLAGS% -DGMP_INCLUDE_DIR="c:/Tools/vcpkg/installed/x64-windows/include" -DGMP_LIBRARIES_DIR="c:/Tools/vcpkg/installed/x64-windows/lib" -DGMP_LIBRARIES="c:/Tools/vcpkg/installed/x64-windows/lib/mpir.lib" -DMPFR_LIBRARIES="c:/Tools/vcpkg/installed/x64-windows/lib/mpfr.lib" -DCMAKE_TOOLCHAIN_FILE=c:/Tools/vcpkg/scripts/buildsystems/vcpkg.cmake ..
  + - cmake -G "Visual Studio 15 2017 Win64" %CMAKE_FLAGS% -DGMP_INCLUDE_DIR="c:/Tools/vcpkg/installed/x64-windows/include" -DGMP_LIBRARIES_DIR="c:/Tools/vcpkg/installed/x64-windows/lib" -DGMP_LIBRARIES="c:/Tools/vcpkg/installed/x64-windows/lib/mpir.lib" -DMPFR_INCLUDE_DIR="c:/Tools/vcpkg/installed/x64-windows/include" -DMPFR_LIBRARIES_DIR="c:/Tools/vcpkg/installed/x64-windows/lib" -DMPFR_LIBRARIES="c:/Tools/vcpkg/installed/x64-windows/lib/mpfr.lib" -DCMAKE_TOOLCHAIN_FILE=c:/Tools/vcpkg/scripts/buildsystems/vcpkg.cmake ..
  - if [%target%]==[Python] (
  cd src/python &
  MSBuild Cython.sln /m /p:Configuration=Release /p:Platform=x64 &
  