From 55ba520c8fdbc48cbf95b25a148030fb99f66acc Mon Sep 17 00:00:00 2001
From: carzh <wolfivyaura@gmail.com>
Date: Fri, 7 Feb 2025 15:38:00 -0800
Subject: [PATCH] try with custom csharp preprocessor define cmake

---
 cmake/CMakeLists.txt                      |  7 ++++
 cmake/onnxruntime_csharp_predefines.cmake | 50 +++++++++++++++++++++++
 tools/ci_build/build.py                   |  1 +
 3 files changed, 58 insertions(+)
 create mode 100644 cmake/onnxruntime_csharp_predefines.cmake

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 11e251b04c..c1f4d603bf 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -257,6 +257,8 @@ option(onnxruntime_USE_OPENVINO_INTERFACE "Build ONNXRuntime shared lib which is
 option(onnxruntime_USE_VITISAI_INTERFACE "Build ONNXRuntime shared lib which is compatible with Vitis-AI EP interface" OFF)
 option(onnxruntime_USE_QNN_INTERFACE "Build ONNXRuntime shared lib which is compatible with QNN EP interface" OFF)
 
+option(onnxruntime_ADD_CSHARP_PREDEFINES "Add predefines for C# build" OFF)
+
 # ENABLE_TRAINING includes all training functionality
 # The following 2 entry points
 # 1. ORTModule
@@ -1820,6 +1822,11 @@ if (onnxruntime_BUILD_CSHARP)
   list(APPEND ONNXRUNTIME_CMAKE_FILES onnxruntime_csharp)
 endif()
 
+if (onnxruntime_ADD_CSHARP_PREDEFINES)
+  message(STATUS "Generating CSharp preprocessor defines")
+  list(APPEND ONNXRUNTIME_CMAKE_FILES onnxruntime_csharp_predefines)
+endif()
+
 if (CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
   message(STATUS "WebAssembly Build is enabled")
   list(APPEND ONNXRUNTIME_CMAKE_FILES onnxruntime_webassembly)
diff --git a/cmake/onnxruntime_csharp_predefines.cmake b/cmake/onnxruntime_csharp_predefines.cmake
new file mode 100644
index 0000000000..b83ee8ab7c
--- /dev/null
+++ b/cmake/onnxruntime_csharp_predefines.cmake
@@ -0,0 +1,50 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+set (CSHARP_ROOT ${PROJECT_SOURCE_DIR}/../csharp)
+
+if (onnxruntime_USE_CUDA)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_CUDA;")
+endif()
+
+if (onnxruntime_USE_DNNL)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_DNNL;")
+endif()
+
+if (onnxruntime_USE_DML)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_DML;")
+endif()
+
+if (onnxruntime_USE_MIGRAPHX)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_MIGRAPHX;")
+endif()
+
+if (onnxruntime_USE_NNAPI_BUILTIN)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_NNAPI;")
+endif()
+
+if (onnxruntime_USE_OPENVINO)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_OPENVINO;")
+endif()
+
+if (onnxruntime_USE_ROCM)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_ROCM;")
+endif()
+
+if (onnxruntime_USE_TENSORRT)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_TENSORRT;")
+endif()
+
+if (onnxruntime_USE_XNNPACK)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "USE_XNNPACK;")
+endif()
+
+if (onnxruntime_ENABLE_TRAINING_APIS)
+  STRING(APPEND CSHARP_PREPROCESSOR_DEFINES "__TRAINING_ENABLED_NATIVE_BUILD__;")
+endif()
+
+# generate Directory.Build.props
+set(DIRECTORY_BUILD_PROPS_COMMENT "WARNING: This is a generated file, please do not check it in!")
+configure_file(${CSHARP_ROOT}/Directory.Build.props.in
+               ${CSHARP_ROOT}/Directory.Build.props
+               @ONLY)
diff --git a/tools/ci_build/build.py b/tools/ci_build/build.py
index 5435d9593f..815475c019 100644
--- a/tools/ci_build/build.py
+++ b/tools/ci_build/build.py
@@ -1028,6 +1028,7 @@ def generate_build_tree(
         "-Donnxruntime_USE_MIMALLOC=" + ("ON" if args.use_mimalloc else "OFF"),
         "-Donnxruntime_ENABLE_PYTHON=" + ("ON" if args.enable_pybind else "OFF"),
         "-Donnxruntime_BUILD_CSHARP=" + ("ON" if args.build_csharp else "OFF"),
+        "-Donnxruntime_ADD_CSHARP_PREDEFINES=" + ("ON" if args.build_csharp or args.android else "OFF"),
         "-Donnxruntime_BUILD_JAVA=" + ("ON" if args.build_java else "OFF"),
         "-Donnxruntime_BUILD_NODEJS=" + ("ON" if args.build_nodejs else "OFF"),
         "-Donnxruntime_BUILD_OBJC=" + ("ON" if args.build_objc else "OFF"),