cpython\Modules\socketmodule.c(7473,5): error C2065: 'HVSOCKET_CONTAINE R_PASSTHRU': undeclared identifier

[jschwar313]

Bug report

I forked the main branch on cpython and cloned it to my local Windows environment. I then ran build.bat -e -d in my windows cmd as an administrator and I received the above error.

Your environment

I have 64-bit python 3.10.4 on Windows 10 64-bit version 21H2 (OS build 19044.1741)
I have visual studio 2019 Community Edition installed Version 16.11.15

Here is the output from running the build script as mentioned below.

H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild>build.bat -e -d
Using py -3.10 (found 3.10 with py.exe)
Fetching external libraries...
bzip2-1.0.8 already exists, skipping.
sqlite-3.38.4.0 already exists, skipping.
xz-5.2.5 already exists, skipping.
zlib-1.2.12 already exists, skipping.
Fetching external binaries...
libffi-3.4.2 already exists, skipping.
openssl-bin-1.1.1n already exists, skipping.
tcltk-8.6.12.1 already exists, skipping.
Finished.
Using "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\msbuild.exe" (found in the Visual Studio installation)
Using py -3.10 (found 3.10 with py.exe)

H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild>"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\msbuild.exe" "H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\pcbuild.proj" /t:Build /m /nologo /v:m /clp:summary /p:Configuration=Debug /p:Platform=x64 /p:IncludeExternals=true /p:IncludeCTypes=true /p:IncludeSSL=true /p:IncludeTkinter=true /p:UseTestMarker= /p:GIT="C:\Program Files\Git\cmd\git.exe"
_freeze_module.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\win32_freeze_module_d.exe
Killing any running python_d.exe instances...
Generated sources are up to date
Getting build info from "C:\Program Files\Git\cmd\git.exe"
Building heads/main:30610d2837 main
deepfreeze.c
pythoncore.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\python312_d.dll
_ctypes_test.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_ctypes_test_d.pyd
_testbuffer.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_testbuffer_d.pyd
_testcapi.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_testcapi_d.pyd
testinternalcapi.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_testinternalcapi
d.pyd
_testembed.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_testembed_d.exe
_testimportmultiple.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_testimportmulti
ple_d.pyd
_testmultiphase.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_testmultiphase_d.py
d
_testconsole.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_testconsole_d.pyd
python3dll.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\python3_d.dll
_overlapped.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_overlapped_d.pyd
pyexpat.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\pyexpat_d.pyd
pywlauncher.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\pyw_d.exe
venvwlauncher.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\venvwlauncher_d.exe
_msi.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_msi_d.pyd
pylauncher.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\py_d.exe
venvlauncher.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\venvlauncher_d.exe
_elementtree.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_elementtree_d.pyd
pyshellext.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\pyshellext_d.dll
_zoneinfo.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_zoneinfo_d.pyd
_queue.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_queue_d.pyd
_multiprocessing.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_multiprocessing_d.
pyd
_decimal.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_decimal_d.pyd
_asyncio.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_asyncio_d.pyd
_ctypes.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_ctypes_d.pyd
sqlite3.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\sqlite3_d.dll
select.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\select_d.pyd
socketmodule.c
unicodedata.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\unicodedata_d.pyd
_bz2.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_bz2_d.pyd
winsound.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\winsound_d.pyd
_uuid.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_uuid_d.pyd
_tkinter.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_tkinter_d.pyd
liblzma.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64\liblzma_d.lib
_sqlite3.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_sqlite3_d.pyd
_hashlib.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_hashlib_d.pyd
_lzma.vcxproj -> H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild\amd64_lzma_d.pyd
H:\Users\LindaJim\Documents\SourceCode\Software\cpython\Modules\socketmodule.c(7473,5): error C2065: 'HVSOCKET_CONTAINE
R_PASSTHRU': undeclared identifier [H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild_socket.vcxproj]

Build FAILED.

H:\Users\LindaJim\Documents\SourceCode\Software\cpython\Modules\socketmodule.c(7473,5): error C2065: 'HVSOCKET_CONTAINE
R_PASSTHRU': undeclared identifier [H:\Users\LindaJim\Documents\SourceCode\Software\cpython\PCbuild_socket.vcxproj]
0 Warning(s)
1 Error(s)

Time Elapsed 00:00:12.76

[jschwar313]

The main branch I forked in GitHub is https://github.com/python/cpython

[erlend-aasland]

cc. @jborean93

[jborean93]

I'm no expert in all this but it sounds like potentially the Windows headers that are present don't include hvsocket.h where this (and others are defined). It seems like hvsocket.h was added in Windows 10 14393 (late 2016). Maybe your installed Windows SDK is based on a version older than this?

[erlend-aasland]

If the HV socket feature was added in Windows 10, we should add a guard for Windows 10 for this feature, and also update the docs to mention this.

[jborean93]

Is there an expectation of a minimum Windows version for building CPython? If there isn't we can probably add a guard to get it compiling on older hosts but if there is, do we want to go out of our way to get it working. I'm happy either way, I just don't know what the general practice for all this is.

We can certainly add docs to state the Hyper-V sockets will only work on Windows 10/Server 2016. The only thing I will add is it looks like Python 3.12 will be coming out in 2023-10 which is pretty much the EOL of Server 2012, 2012 R2, and Win 8. Does Python follow this same support cycle for what Windows versions it runs on? PEP 11 seems to indicate they follow the same lifecycle as what Windows supports.

[erlend-aasland]

I'll let @zooba take over from here :) I don't use Windows, and I don't know which Windows version Python 3.12 will or should support.

[zooba]

We can certainly rule out older Windows SDKs. Those are forwards/backwards compatible, so anyone can use the latest one regardless of what version of Windows they are building on or targeting.

PCbuild/project.props contains a minimum WinSDK version, which will be upgraded if a newer one is detected. If we know which version is required, that field can just be updated.

[erlend-aasland]

PCbuild/pcbuild.proj, I presume? :)

[zooba]

No, it's in the props file that gets imported by each project.

[erlend-aasland]

Got it, thanks!

[erlend-aasland]

IIUC, we can close this as a result of GH-94069.