clang version string contains malformed repo URL https:/github.com

[simonw]

I spotted this in Pyodide:

https://pyodide.org/en/stable/console.html

>>> import sys
>>> sys.version
'3.14.2 (main, Sep 14 2026, 03:03:51) [Clang 23.0.0git (https:/github.com/llvm/llvm-project e5927fecf8a6ce89e1a4eac5b8'

Note the URL there is:

https:/github.com/llvm/llvm-project

It should be:

https://github.com/llvm/llvm-project

It looks like the bug is in emscripten-releases - which doesn't have a separate bug tracker as far as I can tell.

https://chromium.googlesource.com/emscripten-releases/+/6eae703422b3962d1ed75e15f728ece57aad6bd6/src/build.py#646 does this:

    return [WindowsFSEscape(arg) for arg in command]

And one of those command arguments is:

'-DCLANG_REPOSITORY_STRING=%s' % CLANG_GIT_REPO,

[sbc100]

Wow, nice find. @dschuff do we need to pass CLANG_REPOSITORY_STRING here? Seems like an simple enough fix, or we could just remove it I guess?

[dschuff]

IIRC that's there because otherwise the repository string is the googlesource.com mirror, but the hashes are the same and we want to get bug reports upstream. So I guess we can just fix the escaping.

[sbc100]

Is there any reason not to report googlesource.com mirror? That would be technically more correct, no?