error C2143 failed with exit status 2 when using pip install from Anaconda

[ktnr]

I tried to pip install the repo in a conda environment and VS19. I got the following error. (I do have installed the "Microsoft Visual C++ 2015-2019 Redistributable - 14.25.28508" for x86 and x64.)

(pybindenv) C:\Users\Leo\Source\Repos\pybind>pip install .
Processing c:\users\leo\source\repos\pybind
Building wheels for collected packages: python-example
  Building wheel for python-example (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: 'C:\Users\Leo\Anaconda3\envs\pybindenv\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Leo\\AppData\\Local\\Temp\\pip-req-build-kagahwum\\setup.py'"'"'; __file__='"'"'C:\\Users\\Leo\\AppData\\Local\\Temp\\pip-req-build-kagahwum\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d 'C:\Users\Leo\AppData\Local\Temp\pip-wheel-b07wghh7'
       cwd: C:\Users\Leo\AppData\Local\Temp\pip-req-build-kagahwum\
  Complete output (12 lines):
  running bdist_wheel
  running build
  running build_ext
  building 'python_example' extension
  creating build
  creating build\temp.win-amd64-3.8
  creating build\temp.win-amd64-3.8\Release
  creating build\temp.win-amd64-3.8\Release\src
  C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.25.28610\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -DVERSION_INFO="0.0.1" -Ic:\users\leo\appdata\local\temp\pip-req-build-kagahwum\.eggs\pybind11-2.5.0-py3.8.egg\pybind11\include -IC:\Users\Leo\Anaconda3\envs\pybindenv\include -IC:\Users\Leo\Anaconda3\envs\pybindenv\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.25.28610\ATLMFC\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.25.28610\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt" /EHsc /Tpsrc/main.cpp /Fobuild\temp.win-amd64-3.8\Release\src/main.obj /EHsc
  main.cpp
  src/main.cpp(36): error C2143: Syntaxfehler: Es fehlt ";" vor "Konstante"
  error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.25.28610\\bin\\HostX86\\x64\\cl.exe' failed with exit status 2
  ----------------------------------------
  ERROR: Failed building wheel for python-example
  Running setup.py clean for python-example
Failed to build python-example
Installing collected packages: python-example
    Running setup.py install for python-example ... error
    ERROR: Command errored out with exit status 1:
     command: 'C:\Users\Leo\Anaconda3\envs\pybindenv\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Leo\\AppData\\Local\\Temp\\pip-req-build-kagahwum\\setup.py'"'"'; __file__='"'"'C:\\Users\\Leo\\AppData\\Local\\Temp\\pip-req-build-kagahwum\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\Leo\AppData\Local\Temp\pip-record-uxtepnq8\install-record.txt' --single-version-externally-managed --compile --install-headers 'C:\Users\Leo\Anaconda3\envs\pybindenv\Include\python-example'
         cwd: C:\Users\Leo\AppData\Local\Temp\pip-req-build-kagahwum\
    Complete output (12 lines):
    running install
    running build
    running build_ext
    building 'python_example' extension
    creating build
    creating build\temp.win-amd64-3.8
    creating build\temp.win-amd64-3.8\Release
    creating build\temp.win-amd64-3.8\Release\src
    C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.25.28610\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -DVERSION_INFO="0.0.1" -Ic:\users\leo\appdata\local\temp\pip-req-build-kagahwum\.eggs\pybind11-2.5.0-py3.8.egg\pybind11\include -IC:\Users\Leo\Anaconda3\envs\pybindenv\include -IC:\Users\Leo\Anaconda3\envs\pybindenv\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.25.28610\ATLMFC\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.25.28610\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt" /EHsc /Tpsrc/main.cpp /Fobuild\temp.win-amd64-3.8\Release\src/main.obj /EHsc
    main.cpp
    src/main.cpp(36): error C2143: Syntaxfehler: Es fehlt ";" vor "Konstante"
    error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.25.28610\\bin\\HostX86\\x64\\cl.exe' failed with exit status 2
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'C:\Users\Leo\Anaconda3\envs\pybindenv\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Leo\\AppData\\Local\\Temp\\pip-req-build-kagahwum\\setup.py'"'"'; __file__='"'"'C:\\Users\\Leo\\AppData\\Local\\Temp\\pip-req-build-kagahwum\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\Leo\AppData\Local\Temp\pip-record-uxtepnq8\install-record.txt' --single-version-externally-managed --compile --install-headers 'C:\Users\Leo\Anaconda3\envs\pybindenv\Include\python-example' Check the logs for full command output.

(pybindenv) C:\Users\Leo\Source\Repos\pybind>

Any idea what the issue is?

[rafael-fuente]

I get the same error. I removed

#ifdef VERSION_INFO
    m.attr("__version__") = VERSION_INFO;
#else
    m.attr("__version__") = "dev";
#endif

from src/main.cpp and the error disappeared.

[ktnr]

Thanks for letting me know. It would be nice to know why. You also had the error with Anaconda and VS19, or is this a broader issue?

[rafael-fuente]

I had the same error with Anaconda and with a python installation without Anaconda using VS19 MSVC compiler. Remplacing the lines with m.attr("__version__") = "dev"; from src/main.cpp also works.

[mihsamusev]

Abovementioned fixes work for me as well

[magro11]

I guess that this is no special Anaconda error. The problem seems to be, that a pre-processor variable does not have a defined datatype, such that VERSION_INFO="0.0.1" is not always considered to be a string (for instance in Visual Studio).

Please see this stackoverflow-article for a similar problem: https://stackoverflow.com/questions/240353/convert-a-preprocessor-token-to-a-string

For me it worked (VS2017) to write the following code:

#ifdef VERSION_INFO
    #define STRINGIFY(x) #x
    #define TOSTRING(x) STRINGIFY(x)
    m.attr("__version__") = TOSTRING(VERSION_INFO);
#else
    m.attr("__version__") = "dev";
#endif

[henryiii]

This was resolved some time ago.