使用f2py后未生成扩展模块（* .so）

Question

I use Win7, and installed Anaconda for python and gfortran (MINGW) for fortran.

After using f2py, I cannot find a extension module file. I tried the example in the following links:

Three ways to wrap

F2PY - Calling Fortran routines from Python

If I type as follows in the Anaconda prompt,

<base> C:\Codes\F2PY> f2py -c --fcompiler=gfortran -m fib1 fib1.f

Then, fib1.cp36-win_amd64.pyd file and fib1 folder is generated. .libs folder is located under the fib folder, and there exists libfib1.5W62YGKMVL6PD3QLPPSXTQ2OGA5LRIRQ.gfortran-win_amd64 file in the .libs folder.

However, the expected extension module ( fib1.so ) is not generated.

Is there anything I missed?

I already checked gfortran and python are working well seprately.

C:\Codes\F2PY>f2py -c --fcompiler=gfortran -m fib1 fib1.f   
C:\Codes\F2PY>call "D:\Anaconda\Scripts\\..\python.exe" "D:\Anaconda\Scripts\\f2py.py" -c --fcompiler=gfortran -m fib1 fib1.f
Unknown vendor: "gfortran"
running build
running config_cc
unifing config_cc, config, build_clib, build_ext, 
build commands --compiler options
running config_fc
unifing config_fc, config, build_clib, build_ext, 
build commands --fcompiler options
running build_src
build_src
building extension "fib1" sources
f2py options: []
f2py:>C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\src.win-amd64-3.6\fib1module.c
creating C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\src.win-amd64-3.6
Reading fortran codes...
        Reading file 'fib1.f' (format:fix,strict)
Post-processing...
        Block: fib1
                    Block: fib
Post-processing (stage 2)...
Building modules...
       Building module "fib1"...
            Constructing wrapper function "fib"...
              fib(a,[n])
    Wrote C/API module "fib1" to file "C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\src.win-amd64-3.6\fib1module.c"
  adding 'C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\src.win-amd64-3.6\fortranobject.c' to sources.
  adding 'C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\src.win-amd64-3.6' to include_dirs.
copying D:\Anaconda\lib\site-packages\numpy\f2py\src\fortranobject.c -> C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\src.win-amd64-3.6
copying D:\Anaconda\lib\site-packages\numpy\f2py\src\fortranobject.h -> C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\src.win-amd64-3.6
build_src: building npy-pkg config files
running build_ext
No module named 'numpy.distutils._msvccompiler' in numpy.distutils; trying from distutils
customize MSVCCompiler
customize MSVCCompiler using build_ext
customize Gnu95FCompiler
Found executable C:\MinGW\bin\gfortran.exe
customize Gnu95FCompiler using build_ext
building 'fib1' extension
compiling C sources
creating C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\Release\Users
creating C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\Release\Users\6829396
creating C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\Release\Users\6829396\AppData
creating C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\Release\Users\6829396\AppData\Local
creating C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\Release\Users\6829396\AppData\Local\Temp
creating C:\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_\Release\Users\6829396\AppData\Local\Temp\tmpkzx_h7w_

C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.15.26726\\bin\\HostX86\\x64\\link.exe /nologo /INCREMENTAL:NO /LTCG /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO /LIBPATH:c:\\mingw\\lib\\gcc\\mingw32\\6.3.0 /LIBPATH:c:\\mingw\\lib /LIBPATH:D:\\Anaconda\\libs /LIBPATH:D:\\Anaconda\\PCbuild\\amd64 /LIBPATH:D:\\Anaconda\\libs /LIBPATH:D:\\Anaconda\\PCbuild\\amd64 /LIBPATH:"C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.15.26726\\ATLMFC\\lib\\x64" /LIBPATH:"C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.15.26726\\lib\\x64" /LIBPATH:"C:\\Program Files (x86)\\Windows Kits\\10\\lib\\10.0.17134.0\\ucrt\\x64" /LIBPATH:"C:\\Program Files (x86)\\Windows Kits\\10\\lib\\10.0.17134.0\\um\\x64" /EXPORT:PyInit_fib1 C:\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\Release\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\src.win-amd64-3.6\\fib1module.obj C:\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\Release\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\src.win-amd64-3.6\\fortranobject.obj C:\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\Release\\libfib1.5W62YGKMVL6PD3QLPPSXTQ2OGA5LRIRQ.gfortran-win_amd64.lib /OUT:.\\fib1.cp36-win_amd64.pyd /IMPLIB:C:\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\Release\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\src.win-amd64-3.6\\fib1.cp36-win_amd64.lib copying C:\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs\\Release\\.libs\\libfib1.5W62YGKMVL6PD3QLPPSXTQ2OGA5LRIRQ.gfortran-win_amd64.dll -> .\\fib1\\.libs Removing build directory C:\\Users\\6829396\\AppData\\Local\\Temp\\tmpo3wc2rbs

Answer 1

I also use Win 7 + Anaconda + gfortran (MINGW) and had the same problem trying to wrap a subroutine distan(x,nx,nd,d) contained in a sdistan.f90 file.

The command python -m numpy.f2py -c -m sdistan sdistan.f90 generated a sdistan.cp37-win_amd64.pyd file instead of a *.so module.

After analyzing the sdistan.cp37-win_amd64.pyd file with depends.exe , I discovered that there were two unresolved external dependencies:

(1) the libsdistan.LD66OEXBPEJ74HMF6SZDLFFCVSPSTQVW.gfortran-win_amd64.dll DLL file that f2py places in the sdistan/.libs folder.

(2) and python3.dll

I copied these two files (the second from C:/Anaconda3/python3.dll ) into my working directory and the problem was solved.

Now I can import sdistan and I can use my function as output=sdistan.distan (input arguments).

I hope this can help those who find the same problem. It would be nice if somebody could explain and correct this (strange/miss) behavior of f2py .

Thanks to everybody contributing to Stack Overflow!!