Missing Python DLL in Windows binary

[luc0x61]

[LLVM 17.0.6]
Note that lldb depends on liblldb.dll, which in turn depends on python310.dll: this last one is missing in Windows x64 binary files - i.e. lldb can't be run, out of the box.
The obvious way to run it is by providing the missing Python library.

[DimitryAndric]

I think the assumption is that you must install Python first, which is not that difficult to do on Windows. But of course you must use the same version 3.10.

[llvmbot]

@llvm/issue-subscribers-lldb

Author: None (luc0x61)

[LLVM 17.0.6] Note that `lldb` depends on `liblldb.dll`, which in turn depends on `python310.dll`: this last one is **missing** in Windows x64 binary files - i.e. `lldb` can't be run, out of the box. The obvious way to run it is by providing the missing Python library.

[luc0x61]

I think the assumption is that you must install Python first, which is not that difficult to do on Windows. But of course you must use the same version 3.10.

Note that installing Python doesn't satisfy it in itself:

• you have to install Python 3.10, not the latest, or the DLL won't be found
• lldb still doesn't find the DLL, unless you move it to a searchable path (no, not where the Python installer puts it, anyway)

[bulbazord]

LLDB doesn't depend on Python 3.10 specifically. You can use any version between 3.6 and 3.11 (3.12 and newer have issues -- See #70453). Likely your CMake configuration chose this based on the python interpreter that it found on your machine (but I'm not 100% sure).

Please see the instructions for building LLDB on Windows for more information: https://lldb.llvm.org/resources/build.html

[ynyyn]

It seems that downloading a Python's official release variant of Windows embeddable package (e.g. python-3.10.11-embed-amd64.zip released from https://www.python.org/downloads/windows/ for win64 LLVM) and copying the python310.dll that comes with the package to lldb.exe's location (that is bin\ directory) could fix the dependency issue to make lldb.exe runable. However, as for the functionality and integrity of the Python scripting, I don't know much about this and have not tested it in depth.

Credits: https://www.reddit.com/r/LLVM/comments/ziw1h4/lldb_doesnt_work_on_windows_10/

[HeavySnowJakarta]

why it's not providing python310.dll by default? i don't think it makes sence