”ERROR: Failed building wheel for Polygon3“ 安装Polygon3时提示错误的解决方法

在安装CnOCR是需要使用到Polygon3这个包，安装时提示报错，需要使用到Microsoft Visual C++ 14.0。

需要下载的工具：Microsoft C++ 编译工具（Microsoft C++ Build Tools）

下载地址：https://visualstudio.microsoft.com/visual-cpp-build-tools/

错误提示：

Building wheels for collected packages: Polygon3
Building wheel for Polygon3 (pyproject.toml) ... error
error: subprocess-exited-with-error
× Building wheel for Polygon3 (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [14 lines of output]
NumPy extension not found - disabling support for it!
running bdist_wheel
running build
running build_py
creating build
creating build\lib.win-amd64-cpython-310
creating build\lib.win-amd64-cpython-310\Polygon
copying Polygon\IO.py -> build\lib.win-amd64-cpython-310\Polygon
copying Polygon\Shapes.py -> build\lib.win-amd64-cpython-310\Polygon
copying Polygon\Utils.py -> build\lib.win-amd64-cpython-310\Polygon
copying Polygon\__init__.py -> build\lib.win-amd64-cpython-310\Polygon
running build_ext
building 'Polygon.cPolygon' extension
error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for Polygon3
Failed to build Polygon3
ERROR: Could not build wheels for Polygon3, which is required to install pyproject.toml-based projects
PS D:\SynologyDrive> pip install Polygon3
Collecting Polygon3
Using cached Polygon3-3.0.9.1.tar.gz (39 kB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Installing backend dependencies ... done
Preparing metadata (pyproject.toml) ... done
Building wheels for collected packages: Polygon3
Building wheel for Polygon3 (pyproject.toml) ... error
error: subprocess-exited-with-error
× Building wheel for Polygon3 (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [14 lines of output]
NumPy extension not found - disabling support for it!
running bdist_wheel
running build
running build_py
creating build
creating build\lib.win-amd64-cpython-310
creating build\lib.win-amd64-cpython-310\Polygon
copying Polygon\IO.py -> build\lib.win-amd64-cpython-310\Polygon
copying Polygon\Shapes.py -> build\lib.win-amd64-cpython-310\Polygon
copying Polygon\Utils.py -> build\lib.win-amd64-cpython-310\Polygon
copying Polygon\__init__.py -> build\lib.win-amd64-cpython-310\Polygon
running build_ext
building 'Polygon.cPolygon' extension
error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for Polygon3
Failed to build Polygon3
ERROR: Could not build wheels for Polygon3, which is required to install pyproject.toml-based projects

下载并安装Microsoft C++ 生成工具进行MSVC v140-VS 2015 C++生成工具的安装

打开安装工具搜索”Visual C++ 14.0″选择”MSVC v140 – VS 2015 C++生成工具（v14.00）“：

工具安装好即可。

如果提示LINK : fatal error LNK1158: 无法运行“rc.exe”

请查看此文章：https://www.nixonli.com/?p=106

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