Revert "export AOTI_TORCH_EXPORT on Windows. (#140030)"

This reverts commit 6733045a4aaef7a8d9fb1f9f8b80f4f5f4ef1f4f.

Reverted https://github.com/pytorch/pytorch/pull/140030 on behalf of https://github.com/huydhn due to Sorry for reverting your change, but my first attempt to fix internal build does not fix all the cases, so let us try again ([comment](https://github.com/pytorch/pytorch/pull/140030#issuecomment-2558043056))

CMakeLists.txt

@@ -1102,9 +1102,6 @@ if(NOT MSVC)
     append_cxx_flag_if_supported("-Wno-error=redundant-move" CMAKE_CXX_FLAGS)
   endif()
 else()
-  # Define export functions for AOTI.
-  add_compile_definitions(EXPORT_AOTI_FUNCTIONS)
-
   # skip unwanted includes from windows.h
   add_compile_definitions(WIN32_LEAN_AND_MEAN)
   # Windows SDK broke compatibility since version 25131, but introduced this

caffe2/CMakeLists.txt

@@ -779,7 +779,6 @@ endif()
 
 if(NOT BUILD_LIBTORCHLESS)
 add_library(torch_cpu ${Caffe2_CPU_SRCS})
-# target_compile_definitions(torch_cpu PRIVATE -DEXPORT_AOTI_FUNCTIONS)
 if(HAVE_SOVERSION)
   set_target_properties(torch_cpu PROPERTIES
       VERSION ${TORCH_VERSION} SOVERSION ${TORCH_SOVERSION})
@@ -959,7 +958,6 @@ elseif(USE_CUDA)
   set(CUDA_LINK_LIBRARIES_KEYWORD)
   torch_compile_options(torch_cuda)  # see cmake/public/utils.cmake
   target_compile_definitions(torch_cuda PRIVATE USE_CUDA)
-  # target_compile_definitions(torch_cuda PRIVATE -DEXPORT_AOTI_FUNCTIONS)
 
   if(USE_CUFILE)
     target_link_libraries(torch_cuda PRIVATE torch::cufile)
@@ -1051,7 +1049,6 @@ if(USE_XPU)
   add_library(torch_xpu ${Caffe2_XPU_SRCS})
   torch_compile_options(torch_xpu)  # see cmake/public/utils.cmake
   target_compile_definitions(torch_xpu PRIVATE USE_XPU)
-  # target_compile_definitions(torch_xpu PRIVATE -DEXPORT_AOTI_FUNCTIONS)
   if(WIN32)
     target_compile_options(torch_xpu PRIVATE /permissive-)
   endif()

torch/CMakeLists.txt

@@ -310,7 +310,6 @@ endif()
 
 add_library(torch_python SHARED ${TORCH_PYTHON_SRCS})
 torch_compile_options(torch_python)  # see cmake/public/utils.cmake
-# target_compile_definitions(torch_python PRIVATE -DEXPORT_AOTI_FUNCTIONS)
 if(APPLE)
   target_compile_options(torch_python PRIVATE
       $<$<COMPILE_LANGUAGE:CXX>: -fvisibility=default>)

torch/csrc/inductor/aoti_torch/c/shim.h

@@ -44,11 +44,8 @@
 // to symbol clashes at link time if libtorch is included in a DLL and binary
 // that depends on the DLL. As a short term fix, we don't export the symbols.
 // In the long term, this will need to be addressed when Windows is supported.
-#ifdef EXPORT_AOTI_FUNCTIONS
-#define AOTI_TORCH_EXPORT __declspec(dllexport)
-#else
-#define AOTI_TORCH_EXPORT __declspec(dllimport)
-#endif
+// #define AOTI_TORCH_EXPORT __declspec(dllexport)
+#define AOTI_TORCH_EXPORT
 #else // !_WIN32
 #define AOTI_TORCH_EXPORT
 #endif // _WIN32