add boost on mac

macx64/lib/boost/cmake/boost_python-1.70.0/libboost_python-variant-static.cmake

@@ -0,0 +1,58 @@
+# Generated by Boost 1.70.0
+
+# address-model=64
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+  _BOOST_SKIPPED("libboost_python27.a" "64 bit, need 32")
+  return()
+endif()
+
+# layout=system
+
+# toolset=xgcc42
+
+# link=static
+
+if(NOT "${Boost_USE_STATIC_LIBS}" STREQUAL "" AND NOT Boost_USE_STATIC_LIBS)
+  _BOOST_SKIPPED("libboost_python27.a" "static, Boost_USE_STATIC_LIBS=${Boost_USE_STATIC_LIBS}")
+  return()
+endif()
+
+if(BUILD_SHARED_LIBS)
+  _BOOST_SKIPPED("libboost_python27.a" "static, BUILD_SHARED_LIBS=${BUILD_SHARED_LIBS}, set Boost_USE_STATIC_LIBS=ON to override")
+  return()
+endif()
+
+# runtime-link=shared
+
+if(Boost_USE_STATIC_RUNTIME)
+  _BOOST_SKIPPED("libboost_python27.a" "shared runtime, Boost_USE_STATIC_RUNTIME=${Boost_USE_STATIC_RUNTIME}")
+  return()
+endif()
+
+# runtime-debugging=off
+
+if(Boost_USE_DEBUG_RUNTIME)
+  _BOOST_SKIPPED("libboost_python27.a" "release runtime, Boost_USE_DEBUG_RUNTIME=${Boost_USE_DEBUG_RUNTIME}")
+  return()
+endif()
+
+# threading=multi
+
+# variant=release
+
+if(NOT "${Boost_USE_RELEASE_LIBS}" STREQUAL "" AND NOT Boost_USE_RELEASE_LIBS)
+  _BOOST_SKIPPED("libboost_python27.a" "release, Boost_USE_RELEASE_LIBS=${Boost_USE_RELEASE_LIBS}")
+  return()
+endif()
+
+message(STATUS "  libboost_python27.a")
+
+# Target file name: libboost_python27.a
+set_property(TARGET Boost::python APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
+set_target_properties(Boost::python PROPERTIES
+  IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE CXX
+  IMPORTED_LOCATION_RELEASE "${_BOOST_LIBDIR}/libboost_python27.a"
+  )
+
+list(APPEND _BOOST_PYTHON_DEPS headers)