[BUG]: Is Pybind11 cmake work for Windows py3.14t if only set `PYTHON_EXECUTABLE`?
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Description
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What version (or hash if on master) of pybind11 are you using?
3.0.2 patch2a0
Problem description
I downloaded the official 3.14 python windows release from python.org and install the python 3.14t therein. When I compiles my extension with mingw (similar should be for MSVC), I explicitly assign in CMakeLists.txt that
set(PYTHON_EXECUTABLE "C:\Program Files\Python314\python3.14t.exe")
I found two questionable things:
- the PYTHON_LIBRARY variable generated by python+"VERSION" will result in linking python314.dll instead of the expected python314t.dll
- I found no where to detect free-threading setting and define Py_GIL_DISABLED=1
Reproducible example code
CMakeLists.txt:
set(PYTHON_EXECUTABLE "C:\Program Files\Python314\python3.14t.exe")
# still need set following to work?
set(PYTHON_LIBRARY "C:\Program Files\Python314\libs\python314t.lib")
set(CMAKE_CXX_FLAG "${CMAKE_CXX_FLAGS} -DPy_GIL_DISABLED=1") # mingw, for example; /D for MSVC
Is this a regression? Put the last known working version here if it is.
Not a regression
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Research direction
Start with the CMake configuration and the CMakeLists.txt settings shown in the report, then reproduce the build on Windows with Python 3.14t. Check whether PYTHON_EXECUTABLE selects python314t.lib and whether Py_GIL_DISABLED=1 is defined automatically; done means the extension builds without the manual PYTHON_LIBRARY and compiler-flag overrides.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cmake, cpp, python
- Domain
- build-system
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100