dll attempt 1

Author: JacobSzwejbka

backends/cuda/CMakeLists.txt

@@ -44,7 +44,14 @@ set(_aoti_cuda_sources
     runtime/shims/int4mm.cu
     runtime/platform/platform.cpp
 )
-add_library(aoti_cuda STATIC ${_aoti_cuda_sources})
+# Build as SHARED library (.dll) on Windows MSVC, otherwise STATIC
+if(MSVC)
+  add_library(aoti_cuda SHARED ${_aoti_cuda_sources})
+  # Define export macro for Windows DLL
+  target_compile_definitions(aoti_cuda PRIVATE EXPORT_AOTI_FUNCTIONS)
+else()
+  add_library(aoti_cuda STATIC ${_aoti_cuda_sources})
+endif()
 target_include_directories(
   aoti_cuda
   PUBLIC ${CUDAToolkit_INCLUDE_DIRS}

examples/models/voxtral/CMakeLists.txt

@@ -88,7 +88,17 @@ list(
 if(EXECUTORCH_BUILD_CUDA)
   find_package(CUDAToolkit REQUIRED)
   list(APPEND link_libraries aoti_cuda)
+  # Handle both static library and shared library (.dll on Windows MSVC)
   executorch_target_link_options_shared_lib(aoti_cuda)
+  # On MSVC, ensure the DLL is copied to the output directory
+  if(MSVC)
+    add_custom_command(TARGET voxtral_runner POST_BUILD
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        $<TARGET_FILE:aoti_cuda>
+        $<TARGET_FILE_DIR:voxtral_runner>
+      COMMENT "Copying aoti_cuda.dll to output directory"
+    )
+  endif()
 endif()
 
 if(EXECUTORCH_BUILD_METAL)