Can't compile on Windows (MinGW)

[HugoGranstrom]

I tried installing torchaudio with the command python setup.py install using the MinGW64 gcc compiler and got this error:

running install
running bdist_egg
running egg_info
writing torchaudio.egg-info\PKG-INFO
writing dependency_links to torchaudio.egg-info\dependency_links.txt
writing requirements to torchaudio.egg-info\requires.txt
writing top-level names to torchaudio.egg-info\top_level.txt
reading manifest file 'torchaudio.egg-info\SOURCES.txt'
writing manifest file 'torchaudio.egg-info\SOURCES.txt'
installing library code to build\bdist.win-amd64\egg
running install_lib
running build_py
copying torchaudio\_ext\th_sox\__init__.py -> build\lib.win-amd64-3.6\torchaudio\_ext\th_sox
running build_ext
generating cffi module 'build\\temp.win-amd64-3.6\\Release\\torchaudio._ext.th_sox._th_sox.c'
already up-to-date
building 'torchaudio._ext.th_sox._th_sox' extension
C:\Program Files\mingw-w64\x86_64-7.3.0-win32-seh-rt_v5-rev0\mingw64\bin\gcc.exe -mdll -O -Wall -DMS_WIN64 -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\lib\site-packages\torch\utils\ffi\..\..\lib\include -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\lib\site-packages\torch\utils\ffi\..\..\lib\include\TH -Itorchaudio/src -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\include -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\include -c build\temp.win-amd64-3.6\Release\torchaudio._ext.th_sox._th_sox.c -o build\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\release\torchaudio._ext.th_sox._th_sox.o
C:\Program Files\mingw-w64\x86_64-7.3.0-win32-seh-rt_v5-rev0\mingw64\bin\gcc.exe -mdll -O -Wall -DMS_WIN64 -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\lib\site-packages\torch\utils\ffi\..\..\lib\include -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\lib\site-packages\torch\utils\ffi\..\..\lib\include\TH -Itorchaudio/src -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\include -IC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\include -c C:\Users\n15hugr\Documents\code\audio-master\torchaudio/src/th_sox.c -o c:\users\n15hugr\documents\code\audio-master\torchaudio\src\th_sox.o
writing build\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\release\_th_sox.cp36-win_amd64.def
C:\Program Files\mingw-w64\x86_64-7.3.0-win32-seh-rt_v5-rev0\mingw64\bin\gcc.exe -shared -s build\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\release\torchaudio._ext.th_sox._th_sox.o c:\users\n15hugr\documents\code\audio-master\torchaudio\src\th_sox.o build\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\release\_th_sox.cp36-win_amd64.def -LC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\lib\site-packages\torch\utils\ffi\..\..\lib -LC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\libs -LC:\Users\n15hugr\AppData\Local\Continuum\miniconda3\PCbuild\amd64 -lsox -lpython36 -lmsvcr140 -o build\lib.win-amd64-3.6\torchaudio\_ext\th_sox\_th_sox.cp36-win_amd64.pyd
c:\users\n15hugr\documents\code\audio-master\torchaudio\src\th_sox.o:th_sox.c:(.text+0x0): multiple definition of `log1p'
build\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\release\torchaudio._ext.th_sox._th_sox.o:torchaudio._ext.th_sox._th_sox.c:(.text+0x2e83): first defined here
c:\users\n15hugr\documents\code\audio-master\torchaudio\src\th_sox.o:th_sox.c:(.text+0xf): multiple definition of `log2'
build\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\release\torchaudio._ext.th_sox._th_sox.o:torchaudio._ext.th_sox._th_sox.c:(.text+0x2e92): first defined here
c:\users\n15hugr\documents\code\audio-master\torchaudio\src\th_sox.o:th_sox.c:(.text+0x1e): multiple definition of `expm1'
build\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\release\torchaudio._ext.th_sox._th_sox.o:torchaudio._ext.th_sox._th_sox.c:(.text+0x2ea1): first defined here
C:/Program Files/mingw-w64/x86_64-7.3.0-win32-seh-rt_v5-rev0/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lsox
C:/Program Files/mingw-w64/x86_64-7.3.0-win32-seh-rt_v5-rev0/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmsvcr140
collect2.exe: error: ld returned 1 exit status
error: command 'C:\\Program Files\\mingw-w64\\x86_64-7.3.0-win32-seh-rt_v5-rev0\\mingw64\\bin\\gcc.exe' failed with exit status 1

[zenetio]

I am facing a similar issue. The compilation goes fine until the building 'torch._C' extension phase where gcc succeed with 10 files, generating the respective .o file. Then I just get a gcc failed with exit status 1.
What I could see is that in this last compiler command line the string has double backslash. For instance,
in the correct compiled lines I can see
C:\tools\myfiles...\gcc.exe
then in the compiled error line I can see
C:\tools\myfiles\...\gcc.exe
In this case I suppose that the doubled backslash is causing the error in gcc.exe but I could not find where the command line is parsed.
But there is another point. If I am using Windows 10 and I configured my cmake to use Visual Studio 2017 and respective msbuild.exe, why the script is calling gcc to generate .o that is compatible for Linux but not for Windows? I think the script should use Microsoft cl.exe compiler.
Any hint?

[HiranCser]

Hi, Any update on this issue? We are need pytorch version 1.1.0 compiled using MinGW. We are facing same issue where compilation fails with following error for 'torch._C' extension

Same error encountered with MinGW64 also.

Copying extension caffe2.python.caffe2_pybind11_state
Copying caffe2.python.caffe2_pybind11_state from torch\Lib\site-packages\caffe2\python\caffe2_pybind11_state.cp36-win_amd64.pyd to E:\GitHub\pytorch\build\lib.win-amd64-3.6\caffe2\python\caffe2_pybind11_state.cp36-win_amd64.pyd
copying torch\Lib\site-packages\caffe2\python\caffe2_pybind11_state.cp36-win_amd64.pyd -> E:\GitHub\pytorch\build\lib.win-amd64-3.6\caffe2\python
building 'torch._C' extension
creating build\temp.win-amd64-3.6
creating build\temp.win-amd64-3.6\Release
creating build\temp.win-amd64-3.6\Release\torch
creating build\temp.win-amd64-3.6\Release\torch\csrc
C:\MinGW\bin\gcc.exe -mdll -O -Wall "-IC:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\include" -c torch/csrc/stub.cpp -o build\temp.win-amd64-3.6\Release\torch\csrc\stub.o /MD /Z7 /EHa /DNOMINMAX /wd4267 /wd4251 /wd4522 /wd4522 /wd4838 /wd4305 /wd4244 /wd4190 /wd4101 /wd4996 /wd4275
gcc: error: /MD: No such file or directory
gcc: error: /Z7: No such file or directory
gcc: error: /EHa: No such file or directory
gcc: error: /DNOMINMAX: No such file or directory
gcc: error: /wd4267: No such file or directory
gcc: error: /wd4251: No such file or directory
gcc: error: /wd4522: No such file or directory
gcc: error: /wd4522: No such file or directory
gcc: error: /wd4838: No such file or directory
gcc: error: /wd4305: No such file or directory
gcc: error: /wd4244: No such file or directory
gcc: error: /wd4190: No such file or directory
gcc: error: /wd4101: No such file or directory
gcc: error: /wd4996: No such file or directory
gcc: error: /wd4275: No such file or directory
error: command 'C:\\MinGW\\bin\\gcc.exe' failed with exit status 1

[mthrok]

Closing as the build process has been changed to CMake, we have better Windows support and the issue reported here is obsolete.
If anyone encounters build error, please file a new issue.