有关于如何用f2py使用scikit-build的工作示例吗？

Question

scikit-build发行版提供了FindF2PY和UseF2PY的使用示例，但它们是不完整的，只提供了部分CMakeLists.txt文件，而没有提供其他必需的文件。基于这些文档，我还没能做出构建的东西。

按照scikit-build文档中的示例，我创建了以下文件：

CMakeLists.txt：

cmake_minimum_required(VERSION 3.10.2)

project(skbuild_test)

enable_language(Fortran)

find_package(F2PY REQUIRED)

add_f2py_target(f2py_test f2py_test.f90)
add_library(f2py_test MODULE f2py_test.f90)
install(TARGETS f2py_test LIBRARY DESTINATION f2py_test)

setup.py：

import setuptools
from skbuild import setup

requires=['numpy']

setup(
    name="skbuild-test",
    version='0.0.1',
    description='Performs line integrals through SAMI3 grids',
    author='John Haiducek',
    requires=requires,
    packages=['f2py_test']
)

f2py_test.f90：

module mod_f2py_test
  implicit none
contains
  subroutine f2py_test(a,b,c)
    real(kind=8), intent(in)::a,b
    real(kind=8), intent(out)::c
  end subroutine f2py_test
end module mod_f2py_test

此外，我还创建了一个目录f2py_test，其中包含一个空的init.py。

来自python setup.py develop的输出显示，scikit-build调用CMake并编译我的Fortran代码。但是，在编译f2py包装程序代码时，它无法找到Python.h：

[2/7] Building C object CMakeFiles/_f2...kages/numpy/f2py/src/fortranobject.c.o
FAILED: CMakeFiles/_f2py_runtime_library.dir/venv/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.c.o 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc   -O3 -DNDEBUG -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -mmacosx-version-min=10.14 -MD -MT CMakeFiles/_f2py_runtime_library.dir/venv/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.c.o -MF CMakeFiles/_f2py_runtime_library.dir/venv/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.c.o.d -o CMakeFiles/_f2py_runtime_library.dir/venv/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.c.o   -c ../../../venv/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.c
In file included from ../../../venv/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.c:2:
../../../venv/lib/python3.8/site-packages/numpy/f2py/src/fortranobject.h:7:10: fatal error: 'Python.h' file not found
#include "Python.h"
         ^~~~~~~~~~
1 error generated.

Answer 1

首先要注意的是，也许有更好的方法来做到这一点，因为我刚刚想出了如何通过在您的帖子上绊脚石和查看文档来使scikit构建工作。第二个警告，我也在学习cmake。所以，也许有更好的方法。

在这里，有几件事你需要让你的例子起作用。最大的一个是add_f2py_target()的第二个参数不是源文件。它要么是预先生成的*.pyf的名称，要么让f2py生成一个没有*.pyf扩展的参数。另一种是为各种组件添加包含目录。

我让您的示例使用以下CMakeLists.txt：

cmake_minimum_required(VERSION 3.10.2)
project(skbuild_test)
enable_language(Fortran)
find_package(F2PY REQUIRED)
find_package(PythonLibs REQUIRED)
find_package(Python3 REQUIRED COMPONENTS NumPy)

#the following command either generates or points to an existing .pyf
#if provided an argument with .pyf extension, otherwise f2py generates one (not source code).
add_f2py_target(f2py_test f2py_test)
add_library(f2py_test MODULE f2py_test.f90)
include_directories(${PYTHON_INCLUDE_DIRS})
include_directories(${_Python3_NumPy_INCLUDE_DIR})
target_link_libraries(f2py_test ${PYTHON_LIBRARIES})
install(TARGETS f2py_test LIBRARY DESTINATION f2py_test)