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[lldb] Diagnose unsupported configurations when targeting the Limited C API #168145

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Merged
merged 1 commit into from
Nov 14, 2025
+13 −1
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[lldb] Diagnose unsupported configurations when targeting the Limited C API #168145

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14 changes: 13 additions & 1 deletion lldb/cmake/modules/LLDBConfig.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -180,13 +180,25 @@ if (LLDB_ENABLE_PYTHON)
"Path to use as PYTHONHOME in lldb. If a relative path is specified, it will be resolved at runtime relative to liblldb directory.")
endif()

if (SWIG_VERSION VERSION_GREATER_EQUAL "4.2" AND NOT LLDB_EMBED_PYTHON_HOME)
# Enable targeting the Python Limited C API.
set(PYTHON_LIMITED_API_MIN_SWIG_VERSION "4.2")
if (SWIG_VERSION VERSION_GREATER_EQUAL PYTHON_LIMITED_API_MIN_SWIG_VERSION
AND NOT LLDB_EMBED_PYTHON_HOME)
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 LLDB_EMBED_PYTHON_HOME)
message(SEND_ERROR "LLDB_ENABLE_PYTHON_LIMITED_API is not compatible with LLDB_EMBED_PYTHON_HOME")
endif()
if (LLDB_ENABLE_PYTHON_LIMITED_API AND SWIG_VERSION VERSION_LESS PYTHON_LIMITED_API_MIN_SWIG_VERSION)
message(SEND_ERROR "LLDB_ENABLE_PYTHON_LIMITED_API is not compatible with SWIG ${SWIG_VERSION} (requires SWIG ${PYTHON_LIMITED_API_MIN_SWIG_VERSION})")
endif()

else()
# Even if Python scripting is disabled, we still need a Python interpreter to
# build, for example to generate SBLanguages.h.
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