[New-bugs-announce] [issue41368] Allow compiling Python with llvm-clang on Windows.

[William Pickard]

New submission from William Pickard <lollol222gg at gmail.com>:

Since Visual Studio 2017, Microsoft has an optional C++ Desktop Development option for compiling C/C++ code with LLVM's Clang compiler.

It's called: Clang with Microsoft CodeGen.
While the code is parsed with LLVM's Clang parser, the code is generated with a MSVC compatible code generator (hence the "with Microsoft CodeGen" name suffix)

Currently, Python 3.10 is uncompilable with Clang, but I would appreciate it if it can be supported.

I have attached a build log from MSBuild, below is the commandline I used to run the build.

Start-Process -FilePath $(Join-Path $PCBUILD -ChildPath 'build.bat' -Resolve) -WorkingDirectory $PCBuild -NoNewWindow -RedirectStandardOut $BUILD_LOG -RedirectStandardError $BUILDERROR_LOG -ArgumentList '-m', '-v', '-c', 'Debug', '-p', 'x64', '-t', 'Build', '"/p:PlatformToolset=ClangCL"'
PS L:\GIT\cpython> Start-Process -FilePath $(Join-Path $PCBUILD -ChildPath 'build.bat' -Resolve) -WorkingDirectory $PCBuild -NoNewWindow -RedirectStandardOut $BUILD_LOG -RedirectStandardError $BUILDERROR_LOG -ArgumentList '-m', '-v', '-c', 'Debug', '-p', 'x64', '-t', 'Build', '"/p:PlatformToolset=ClangCL"'

----------
components: Cross-Build, Windows
files: build.log
messages: 374099
nosy: Alex.Willmer, William Pickard, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Allow compiling Python with llvm-clang on Windows.
type: compile error
versions: Python 3.10
Added file: https://bugs.python.org/file49331/build.log

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<https://bugs.python.org/issue41368>
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