set_property(SOURCE init.i PROPERTY CPLUSPLUS ON)
set_property(SOURCE init.i PROPERTY SWIG_MODULE_NAME pywrapinit)
set_property(SOURCE init.i PROPERTY COMPILE_DEFINITIONS
  ${OR_TOOLS_COMPILE_DEFINITIONS} ABSL_MUST_USE_RESULT)
swig_add_library(pywrapinit
  TYPE MODULE
  LANGUAGE python
  OUTPUT_DIR  ${PYTHON_PROJECT_DIR}/init
  SOURCES init.i)

target_include_directories(pywrapinit PRIVATE ${Python3_INCLUDE_DIRS})
set_property(TARGET pywrapinit PROPERTY SWIG_USE_TARGET_INCLUDE_DIRECTORIES ON)
target_compile_definitions(pywrapinit PUBLIC "PY3")

# note: macOS is APPLE and also UNIX !
if(APPLE)
  set_target_properties(pywrapinit PROPERTIES
    SUFFIX ".so"
    INSTALL_RPATH "@loader_path;@loader_path/../../${PROJECT_NAME}/.libs")
  set_property(TARGET pywrapinit APPEND PROPERTY
    LINK_FLAGS "-flat_namespace -undefined suppress")
elseif(UNIX)
  set_target_properties(pywrapinit PROPERTIES
    INSTALL_RPATH "$ORIGIN:$ORIGIN/../../${PROJECT_NAME}/.libs")
endif()
target_link_libraries(pywrapinit PRIVATE ortools::ortools)

# Variable PYTHON_LIBRARIES can contains keyword `optimized`
# which won't be interpreted inside a generator expression.
# i.e. we can't use: $<$<PLATFORM_ID:Windows>:${PYTHON_LIBRARIES}>
# see: https://cmake.org/cmake/help/git-stage/command/target_link_libraries.html#command:target_link_libraries
if(MSVC)
  target_link_libraries(pywrapinit PRIVATE ${Python3_LIBRARIES})
endif()