lldb/cmake/modules/FindPythonAndSwig.cmake

   1 #.rst:
   2 # FindPythonAndSwig
   3 # -----------
   4 #
   5 # Find the python interpreter and libraries as a whole.
   6
   7 macro(FindPython3)
   8   # Use PYTHON_HOME as a hint to find Python 3.
   9   set(Python3_ROOT_DIR "${PYTHON_HOME}")
  10   find_package(Python3 COMPONENTS Interpreter Development)
  11   if(Python3_FOUND AND Python3_Interpreter_FOUND)
  12
  13     # The install name for the Python 3 framework in Xcode is relative to
  14     # the framework's location and not the dylib itself.
  15     #
  16     #   @rpath/Python3.framework/Versions/3.x/Python3
  17     #
  18     # This means that we need to compute the path to the Python3.framework
  19     # and use that as the RPATH instead of the usual dylib's directory.
  20     #
  21     # The check below shouldn't match Homebrew's Python framework as it is
  22     # called Python.framework instead of Python3.framework.
  23     if (APPLE AND Python3_LIBRARIES MATCHES "Python3.framework")
  24       string(FIND "${Python3_LIBRARIES}" "Python3.framework" python_framework_pos)
  25       string(SUBSTRING "${Python3_LIBRARIES}" "0" ${python_framework_pos} Python3_RPATH)
  26     endif()
  27
  28     set(PYTHON3_FOUND TRUE)
  29     mark_as_advanced(
  30       Python3_LIBRARIES
  31       Python3_INCLUDE_DIRS
  32       Python3_EXECUTABLE
  33       Python3_RPATH)
  34   endif()
  35 endmacro()
  36
  37 if(Python3_LIBRARIES AND Python3_INCLUDE_DIRS AND Python3_EXECUTABLE AND LLDB_ENABLE_SWIG)
  38   set(PYTHONANDSWIG_FOUND TRUE)
  39 else()
  40   if (LLDB_ENABLE_SWIG)
  41     FindPython3()
  42   else()
  43     message(STATUS "SWIG 3 or later is required for Python support in LLDB but could not be found")
  44   endif()
  45
  46   get_property(MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
  47   if ("${Python3_VERSION}" VERSION_GREATER_EQUAL "3.7" AND
  48       "${SWIG_VERSION}" VERSION_LESS "4.0" AND WIN32 AND (
  49       ${MULTI_CONFIG} OR (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")))
  50     # Technically this can happen with non-Windows builds too, but we are not
  51     # able to detect whether Python was built with assertions, and only Windows
  52     # has the requirement that Debug LLDB must use Debug Python.
  53     message(WARNING "Debug builds of LLDB are likely to be unusable due to "
  54       "<https://github.com/swig/swig/issues/1321>. Please use SWIG >= 4.0.")
  55   endif()
  56
  57   include(FindPackageHandleStandardArgs)
  58   find_package_handle_standard_args(PythonAndSwig
  59                                     FOUND_VAR
  60                                       PYTHONANDSWIG_FOUND
  61                                     REQUIRED_VARS
  62                                       Python3_LIBRARIES
  63                                       Python3_INCLUDE_DIRS
  64                                       Python3_EXECUTABLE
  65                                       LLDB_ENABLE_SWIG)
  66 endif()