如何在 Windows PC 上安装 pygalmesh（取决于 Eigen）？

Question

编辑：对于那些感兴趣的人，创作者目前正在努力here。

我正在尝试安装 pygalmesh using pip install pygalmesh, which depends on Eigen。我已经下载了 Eigen，但是 pip 安装程序没有 "know" 这个。它 returns 以下错误消息：

ERROR: Could not build wheels for pygalmesh which use PEP 517 and cannot be installed directly

更具体地说：

fatal error C1083: Cannot open include file: 'Eigen/Dense':

Pygalmesh 的 github has a file for setup.py 我可以编辑，但我不知道我将如何安装 pygalmesh。还在使用 pip？

是否有我可以编辑的 setup.py 文件，以便安装程序知道 Eigen/Dense 的位置？由于我有一台 Windows PC，我认为至少 / 需要更改为 \。但是我找不到要编辑的setup.py。

我在 web, also here. I don't know how to implement what is talked about in these posts. I have also tried installing eigen through conda, like here 的其他地方找到了关于这个问题的对话。这也没有用。

完整的错误消息：

Collecting pygalmesh
  Using cached pygalmesh-0.6.2.tar.gz (1.2 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Installing backend dependencies ... done
    Preparing wheel metadata ... done
Collecting pybind11>=2.2
  Using cached pybind11-2.5.0.tar.gz (139 kB)
Collecting meshio<5.0.0,>=4.0.0
  Downloading meshio-4.0.11.tar.gz (302 kB)
     |████████████████████████████████| 302 kB 2.2 MB/s
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
    Preparing wheel metadata ... done
Requirement already satisfied: importlib-metadata in c:\users\user\anaconda3\lib\site-packages (from pygalmesh) (1.5.0)
Requirement already satisfied: numpy in c:\users\user\anaconda3\lib\site-packages (from pygalmesh) (1.16.2)
Requirement already satisfied: zipp>=0.5 in c:\users\user\anaconda3\lib\site-packages (from importlib-metadata->pygalmesh) (2.2.0)
Skipping wheel build for pybind11, due to binaries being disabled for it.
Building wheels for collected packages: pygalmesh, meshio
  Building wheel for pygalmesh (PEP 517) ... error
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\User\Anaconda3\python.exe' 'C:\Users\User\Anaconda3\lib\site-packages\pip\_vendor\pep517\_in_process.py' build_wheel 'C:\Users\User\AppData\Local\Temp\tmpa0eqknmo'
       cwd: C:\Users\User\AppData\Local\Temp\pip-install-qm6jy0mx\pygalmesh
  Complete output (24 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build\lib.win-amd64-3.7
  creating build\lib.win-amd64-3.7\pygalmesh
  copying pygalmesh\main.py -> build\lib.win-amd64-3.7\pygalmesh
  copying pygalmesh\__about__.py -> build\lib.win-amd64-3.7\pygalmesh
  copying pygalmesh\__init__.py -> build\lib.win-amd64-3.7\pygalmesh
  creating build\lib.win-amd64-3.7\pygalmesh\_cli
  copying pygalmesh\_cli\helpers.py -> build\lib.win-amd64-3.7\pygalmesh\_cli
  copying pygalmesh\_cli\_inr.py -> build\lib.win-amd64-3.7\pygalmesh\_cli
  copying pygalmesh\_cli\_remesh_surface.py -> build\lib.win-amd64-3.7\pygalmesh\_cli
  copying pygalmesh\_cli\_volume_from_surface.py -> build\lib.win-amd64-3.7\pygalmesh\_cli
  copying pygalmesh\_cli\__init__.py -> build\lib.win-amd64-3.7\pygalmesh\_cli
  running build_ext
  building '_pygalmesh' extension
  creating build\temp.win-amd64-3.7
  creating build\temp.win-amd64-3.7\Release
  creating build\temp.win-amd64-3.7\Release\src
  C:\Program Files (x86)\Microsoft Visual Studio19\Community\VC\Tools\MSVC.22.27905\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -I/usr/include/eigen3/ -IC:\Users\User\AppData\Local\Temp\pip-build-env-bi2kt8ry\normal\Lib\site-packages\pybind11\include -IC:\Users\User\AppData\Local\Temp\pip-build-env-bi2kt8ry\normal\Lib\site-packages\pybind11\include -IC:\Users\User\Anaconda3\include -IC:\Users\User\Anaconda3\include "-IC:\Program Files (x86)\Microsoft Visual Studio19\Community\VC\Tools\MSVC.22.27905\ATLMFC\include" "-IC:\Program Files (x86)\Microsoft Visual Studio19\Community\VC\Tools\MSVC.22.27905\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK.7.2\include\um" "-IC:\Program Files (x86)\Windows Kits\include.0.18362.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\include.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\include.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\include.0.18362.0\winrt" "-IC:\Program Files (x86)\Windows Kits\include.0.18362.0\cppwinrt" /EHsc /Tpsrc/generate.cpp /Fobuild\temp.win-amd64-3.7\Release\src/generate.obj
  generate.cpp
  C:\Users\User\AppData\Local\Temp\pip-install-qm6jy0mx\pygalmesh\src\domain.hpp(4): fatal error C1083: Cannot open include file: 'Eigen/Dense': No such file or directory
  error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.22.27905\bin\HostX86\x64\cl.exe' failed with exit status 2
  ----------------------------------------
  ERROR: Failed building wheel for pygalmesh
  Building wheel for meshio (PEP 517) ... done
  Created wheel for meshio: filename=meshio-4.0.11-py3-none-any.whl size=127526 sha256=cc63c5792c3d20bce3532742afcccc100bc6312c1254e029f8771f286a5979c2
  Stored in directory: c:\users\user\appdata\local\pip\cache\wheels\cf\b034bc0b8bffd85475dfbab9791fcdeea89c77f040c4537afe
Successfully built meshio
Failed to build pygalmesh
ERROR: Could not build wheels for pygalmesh which use PEP 517 and cannot be installed directly

Answer 1

在 pygalmesh github, the community and creator solved the problem. See here 上提出问题后。只需：

conda install -c conda-forge pygalmesh

Answer 2

此解决方案适用于 Windows 10，安装了 python 3.8 和 Visual Studio Community 2019。

安装依赖项：gmp、mpfr、eigen3 和 cgal。我建议 vcpkg 用于库构建和安装，如下所述。您也可以按照自己的方式单独安装和构建这些依赖项，而无需 vcpkg.

1.1。安装 vcpkg (https://vcpkg.io/en/getting-started.html).

1.2。在 x64 静态配置上安装依赖项：
```
vcpkg install gmp:x64-windows-static
vcpkg install mpfr:x64-windows-static
vcpkg install eigen3:x64-windows-static
vcpkg install cgal:x64-windows-static
```

克隆 pygalmesh 来源：

git clone https://github.com/nschloe/pygalmesh.git

将library_dirs=["C:/path/to/vcpkg/installed/x64-windows-static/lib"]添加到pygalmesh/setup.py（参见Modified setup.py below the post，同时勾选备选方案)。 不要忘记插入您自己的 vcpkg 位置而不是我的 /path/to/vcpkg.

构建并安装pygalmesh:

cd pygalmesh
set EIGEN_INCLUDE_DIR=C:/path/to/vcpkg/installed/x64-windows-static/include
pip install .

确保 pygalmesh 已安装：
```
python
>>> import pygalmesh
```

已修改setup.py

import os

from pybind11.setup_helpers import Pybind11Extension, build_ext
from setuptools import setup

# https://github.com/pybind/python_example/
ext_modules = [
    Pybind11Extension(
        "_pygalmesh",
        # Sort input source files to ensure bit-for-bit reproducible builds
        # (https://github.com/pybind/python_example/pull/53)
        sorted(
            [
                "src/generate.cpp",
                "src/generate_2d.cpp",
                "src/generate_from_inr.cpp",
                "src/generate_from_off.cpp",
                "src/generate_periodic.cpp",
                "src/generate_surface_mesh.cpp",
                "src/remesh_surface.cpp",
                "src/pybind11.cpp",
            ]
        ),
        include_dirs=[os.environ.get("EIGEN_INCLUDE_DIR", "/usr/include/eigen3/")],
        # no CGAL libraries necessary from CGAL 5.0 onwards
        libraries=["gmp", "mpfr"],
        
        # !!! ADD YOUR PATH HERE !!!
        library_dirs=["C:/D/Apps/vcpkg/installed/x64-windows-static/lib"]
    )
]

if __name__ == "__main__":
    setup(
        cmdclass={"build_ext": build_ext},
        ext_modules=ext_modules,
        zip_safe=False,
    )

备选方案

事实上，pip 具有指向库路径的命令行参数（--global-option=build_ext、--include-path、--library-path see pip docs and this post），以及一个潜在的安装可以是一对行（在安装 C++ 库的第 1 步之后）：

set EIGEN_INCLUDE_DIR=C:/path/to/vcpkg/installed/x64-windows-static/include
pip install --global-option=build_ext --install-option="--include-path=C:\path\to\vcpkg\installed\x64-windows-static\include" --global-option="--library-path=C:\path\to\vcpkg\installed\x64-windows-static\lib"  pygalmesh

但是。由于某种原因（可能只是我的系统配置功能，或 setuptools==58.1.0 版本特定的“功能”） setuptools 不要将 --library-path 参数放入 MSVC 的 /LIBPATH: 键link.exe构建包时，导致LNK错误。

如何在 Windows PC 上安装 pygalmesh（取决于 Eigen）？

How does one install pygalmesh (which depends on Eigen) on a Windows PC?

python

pip

eigen

anaconda

conda

已修改setup.py

备选方案