Compatible with torch 3rd

CMakeLists.txt

@@ -599,6 +599,9 @@ if(WITH_PROFILER)
 endif()
 
 include_directories("${PADDLE_SOURCE_DIR}")
+include_directories("${PADDLE_SOURCE_DIR}/paddle/phi/api/include/compat/")
+include_directories(
+  "${PADDLE_SOURCE_DIR}/paddle/phi/api/include/compat/torch/csrc/api/include/")
 
 if(WITH_NV_JETSON)
   set(WITH_ARM

paddle/fluid/pybind/pybind.cc

@@ -80,6 +80,7 @@ limitations under the License. */
 #include "paddle/fluid/imperative/amp_auto_cast.h"
 #include "paddle/fluid/imperative/layer.h"
 #include "paddle/fluid/prim/utils/utils.h"
+#include "paddle/fluid/pybind/torch_compat.h"
 #include "paddle/phi/common/bfloat16.h"
 #include "paddle/phi/common/float16.h"
 #include "paddle/phi/common/int_array.h"
@@ -4139,6 +4140,9 @@ All parameter, weight, gradient are variables in Paddle.
   BindVjp(&m);
   BindDecompRule(&m);
   BindDecompVjp(&m);
+  py::module torch_compat = m.def_submodule(
+      "torch_compat", "Compatibility layer for PyTorch-like APIs");
+  BindTorchCompat(&torch_compat);
 #ifdef PADDLE_WITH_DISTRIBUTE
   BindDistApi(&m);
 #endif