[llvm-bugs] [Bug 43637] New: lldb CMake fails when -DLLDB_DISABLE_PYTHON=ON and epydoc is present

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=43637

            Bug ID: 43637
           Summary: lldb CMake fails when -DLLDB_DISABLE_PYTHON=ON and
                    epydoc is present
           Product: Build scripts
           Version: 9.0
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: ofv at wanadoo.es
                CC: llvm-bugs at lists.llvm.org

Created attachment 22650
  --> https://bugs.llvm.org/attachment.cgi?id=22650&action=edit
Suggested fix

On tools/lldb/docs/CMakeLists.txt we have

find_program(EPYDOC_EXECUTABLE NAMES epydoc epydoc.py)
if(EPYDOC_EXECUTABLE)
  ...
  get_target_property(lldb_scripts_dir swig_wrapper BINARY_DIR)

so the get_target command is executed whenever epydoc is present.

But the target swig_wrapper is defined in lldb/scripts/CMakeFiles.txt, which is
included from lldb/CMakeLists.txt:

if (NOT LLDB_DISABLE_PYTHON)
  add_subdirectory(scripts)
endif ()

hence swig_wrapper is defined only when LLDB_DISABLE_PYTHON is OFF.

Attached patch with suggested fix.

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