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[lldb] Don't enable the Limited C API with Python 3.13 and SWIG 4.4.0 #169065

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Merged
JDevlieghere merged 2 commits into from
Nov 21, 2025
Merged

[lldb] Don't enable the Limited C API with Python 3.13 and SWIG 4.4.0 #169065

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[lldb] Don't enable the Limited C API with Python 3.13 and SWIG 4.4.0
JDevlieghere Nov 21, 2025
2232110
Python 3.14 is affected as well
JDevlieghere Nov 21, 2025
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7 changes: 6 additions & 1 deletion lldb/cmake/modules/LLDBConfig.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -182,16 +182,21 @@ if (LLDB_ENABLE_PYTHON)

# Enable targeting the Python Limited C API.
set(PYTHON_LIMITED_API_MIN_SWIG_VERSION "4.2")
set(AFFECTED_BY_SWIG_BUG SWIG_VERSION VERSION_EQUAL "4.4.0" AND Python3_VERSION VERSION_EQUAL "3.13")
if (SWIG_VERSION VERSION_GREATER_EQUAL PYTHON_LIMITED_API_MIN_SWIG_VERSION
AND NOT LLDB_EMBED_PYTHON_HOME)
AND NOT LLDB_EMBED_PYTHON_HOME AND NOT AFFECTED_BY_SWIG_BUG)
set(default_enable_python_limited_api ON)
else()
set(default_enable_python_limited_api OFF)
endif()

option(LLDB_ENABLE_PYTHON_LIMITED_API "Force LLDB to only use the Python Limited API (requires SWIG 4.2 or later)"
${default_enable_python_limited_api})

# Diagnose unsupported configurations.
if (LLDB_ENABLE_PYTHON_LIMITED_API AND AFFECTED_BY_SWIG_BUG)
message(SEND_ERROR "LLDB_ENABLE_PYTHON_LIMITED_API is not compatible with SWIG 4.4.0 and Python 3.13 due to a bug in SWIG: https://github.com/swig/swig/issues/3283")
endif()
if (LLDB_ENABLE_PYTHON_LIMITED_API AND LLDB_EMBED_PYTHON_HOME)
message(SEND_ERROR "LLDB_ENABLE_PYTHON_LIMITED_API is not compatible with LLDB_EMBED_PYTHON_HOME")
endif()
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