build onnxruntime as x

.gitignore

@@ -195,3 +195,4 @@ Package.pins
 Package.resolved
 .build/
 .swiftpm/
+repros/

cmake/CMakeLists.txt

@@ -1774,3 +1774,8 @@ if(TARGET onnxruntime)
     "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
 endif()
+
+if(DEFINED BUILD_AS_ARM64X)
+  set(ARM64X_TARGETS onnxruntime)
+  include("${CMAKE_SOURCE_DIR}/arm64x.cmake")
+endif()

cmake/arm64x.cmake

@@ -0,0 +1,33 @@
+set(arm64ReproDir "${CMAKE_SOURCE_DIR}/repros")
+
+if("${BUILD_AS_ARM64X}" STREQUAL "ARM64")
+	foreach (n ${ARM64X_TARGETS})
+		add_custom_target(mkdirs_${n} ALL COMMAND cmd /c (if exist \"${arm64ReproDir}/${n}_temp/\" rmdir /s /q \"${arm64ReproDir}/${n}_temp\") && mkdir \"${arm64ReproDir}/${n}_temp\" )
+		add_dependencies(${n} mkdirs_${n})
+		target_link_options(${n} PRIVATE "/LINKREPRO:${arm64ReproDir}/${n}_temp")
+		add_custom_target(${n}_checkRepro ALL COMMAND cmd /c if exist \"${n}_temp/*.obj\" if exist \"${n}\" rmdir /s /q \"${n}\" 2>nul && if not exist \"${n}\" ren \"${n}_temp\" \"${n}\" DEPENDS ${n}
+		WORKING_DIRECTORY ${arm64ReproDir})
+	endforeach()
+
+
+elseif("${BUILD_AS_ARM64X}" STREQUAL "ARM64EC")
+	foreach (n ${ARM64X_TARGETS})
+		set(ARM64_LIBS)
+		set(ARM64_OBJS)
+		set(ARM64_DEF)
+
+		file(GLOB ARM64_OBJS "${arm64ReproDir}/${n}/*.obj")
+		file(GLOB ARM64_DEF "${arm64ReproDir}/${n}/*.def")
+		file(GLOB ARM64_LIBS "${arm64ReproDir}/${n}/*.LIB")
+
+		if(NOT "${ARM64_DEF}" STREQUAL "")
+			set(ARM64_DEF "/defArm64Native:${ARM64_DEF}")
+		endif()
+		target_sources(${n} PRIVATE ${ARM64_OBJS})
+		target_link_options(${n} PRIVATE /machine:arm64x "${ARM64_DEF}")
+
+		if(NOT "${ARM64_LIBS}" STREQUAL "")
+			target_link_libraries(${n} PUBLIC ${ARM64_LIBS})
+		endif()
+	endforeach()
+endif()

tools/ci_build/build.py

@@ -346,6 +346,11 @@ def convert_arg_line_to_args(self, arg_line):
         help="[cross-compiling] Create ARM64EC makefiles. Requires --update and no existing cache "
         "CMake setup. Delete CMakeCache.txt if needed",
     )
+    parser.add_argument(
+        "--buildasx",
+        action="store_true",
+        help="[cross-compiling] Create ARM64X Binary.",
+    )
     parser.add_argument("--msvc_toolset", help="MSVC toolset to use. e.g. 14.11")
     parser.add_argument("--windows_sdk_version", help="Windows SDK version to use. e.g. 10.0.19041.0")
     parser.add_argument("--android", action="store_true", help="Build for Android")
@@ -2496,8 +2501,12 @@ def main():
                     cmake_extra_args = ["-A", "ARM"]
                 elif args.arm64:
                     cmake_extra_args = ["-A", "ARM64"]
+                    if args.buildasx:
+                        cmake_extra_args += ["-D", "BUILD_AS_ARM64X=ARM64"]
                 elif args.arm64ec:
-                    cmake_extra_args = ["-A", "ARM64EC"]
+                    cmake_extra_args = ["-A", "ARM64EC", "-D", "BUILD_AS_ARM64X=ARM64EC"]
+                    if args.buildasx:
+                        cmake_extra_args += ["-D", "BUILD_AS_ARM64X=ARM64EC"]
                 cmake_extra_args += ["-G", args.cmake_generator]
                 # Cannot test on host build machine for cross-compiled
                 # builds (Override any user-defined behaviour for test if any)
@@ -2532,6 +2541,7 @@ def main():
                 cmake_extra_args = ["-A", target_arch, "-T", toolset, "-G", args.cmake_generator]
             if args.enable_wcos:
                 cmake_extra_defines.append("CMAKE_USER_MAKE_RULES_OVERRIDE=wcos_rules_override.cmake")
+
         elif args.cmake_generator is not None:
             cmake_extra_args += ["-G", args.cmake_generator]