Merge pull request #11155 from swiftlang/jepa-stable2

[LLDB][cmake] Fix build when LLDB_ENABLE_PYTHON=NO

Author: AnthonyLatsis

lldb/cmake/modules/LLDBConfig.cmake

@@ -211,6 +211,19 @@ if (LLDB_ENABLE_PYTHON)
     set(LLDB_PYTHON_HOME "${PYTHON_HOME}" CACHE STRING
       "Path to use as PYTHONHOME in lldb. If a relative path is specified, it will be resolved at runtime relative to liblldb directory.")
   endif()
+else()
+  # Even if Python scripting is disabled, we still need a Python interpreter to
+  # build, for example to generate SBLanguages.h.
+  find_package(Python3 COMPONENTS Interpreter REQUIRED)
+
+  # Remove lldb-python-scripts from distribution components.
+  # LLVM_DISTRIBUTION_COMPONENTS is set in a cache where LLDB_ENABLE_PYTHON does
+  # not yet have a value. We have to touch up LLVM_DISTRIBUTION_COMPONENTS after
+  # the fact.
+  if(LLVM_DISTRIBUTION_COMPONENTS)
+    list(REMOVE_ITEM LLVM_DISTRIBUTION_COMPONENTS lldb-python-scripts)
+    set(LLVM_DISTRIBUTION_COMPONENTS ${LLVM_DISTRIBUTION_COMPONENTS} CACHE STRING "" FORCE)
+  endif()
 endif()
 
 if (LLVM_EXTERNAL_CLANG_SOURCE_DIR)