[Fix] Add isolated option for TorchScript SDK backend (#1002)

* add option for TorchScript SDK backend

* add doc

* format

csrc/mmdeploy/net/torchscript/CMakeLists.txt

@@ -2,23 +2,27 @@
 
 project(mmdeploy_torch_net)
 
-find_package(Torch REQUIRED)
-find_package(TorchVision)
+option(MMDEPLOY_TORCHSCRIPT_SDK_BACKEND "Build TorchScript SDK backend" OFF)
 
-mmdeploy_add_module(${PROJECT_NAME} torch_net.cpp)
+if (MMDEPLOY_TORCHSCRIPT_SDK_BACKEND)
+    find_package(Torch REQUIRED)
+    find_package(TorchVision QUIET)
 
-target_link_libraries(${PROJECT_NAME} PRIVATE
-        ${TORCH_LIBRARIES})
+    mmdeploy_add_module(${PROJECT_NAME} torch_net.cpp)
 
-target_link_directories(${PROJECT_NAME} INTERFACE
-        $<BUILD_INTERFACE:${Torch_DIR}/../../../lib>)
+    target_link_libraries(${PROJECT_NAME} PRIVATE
+            ${TORCH_LIBRARIES})
 
-target_link_libraries(${PROJECT_NAME} PRIVATE
-        mmdeploy_torchscript_ops_obj)
+    target_link_directories(${PROJECT_NAME} INTERFACE
+            $<BUILD_INTERFACE:${Torch_DIR}/../../../lib>)
 
-if (TorchVision_FOUND)
-    target_link_libraries(${PROJECT_NAME} PRIVATE TorchVision::TorchVision)
-    target_compile_definitions(${PROJECT_NAME} PRIVATE -DMMDEPLOY_USE_TORCHVISION=1)
+    target_link_libraries(${PROJECT_NAME} PRIVATE
+            mmdeploy_torchscript_ops_obj)
+
+    if (TorchVision_FOUND)
+        target_link_libraries(${PROJECT_NAME} PRIVATE TorchVision::TorchVision)
+        target_compile_definitions(${PROJECT_NAME} PRIVATE -DMMDEPLOY_USE_TORCHVISION=1)
+    endif ()
+
+    add_library(mmdeploy::torch_net ALIAS ${PROJECT_NAME})
 endif ()
-
-add_library(mmdeploy::torch_net ALIAS ${PROJECT_NAME})

docs/en/05-supported-backends/torchscript.md

@@ -47,6 +47,14 @@ make -j$(nproc)
 
 - You could follow the instructions of tutorial [How to convert model](../02-how-to-run/convert_model.md)
 
+## SDK backend
+
+TorchScript SDK backend may be built by passing `-DMMDEPLOY_TORCHSCRIPT_SDK_BACKEND=ON` to `cmake`.
+
+Notice that `libtorch` is sensitive to C++ ABI versions. On platforms defaulted to C++11 ABI (e.g. Ubuntu 16+) one may
+pass `-DCMAKE_CXX_FLAGS="-D_GLIBCXX_USE_CXX11_ABI=0"` to `cmake` to use pre-C++11 ABI for building. In this case all
+dependencies with ABI sensitive interfaces (e.g. OpenCV) must be built with pre-C++11 ABI.
+
 ## FAQs
 
 - Error: `projects/thirdparty/libtorch/share/cmake/Caffe2/Caffe2Config.cmake:96 (message):Your installed Caffe2 version uses cuDNN but I cannot find the cuDNN libraries.  Please set the proper cuDNN prefixes and / or install cuDNN.`

docs/zh_cn/05-supported-backends/torchscript.md

@@ -47,6 +47,14 @@ make -j$(nproc)
 
 - You could follow the instructions of tutorial [How to convert model](../02-how-to-run/convert_model.md)
 
+## SDK backend
+
+TorchScript SDK backend may be built by passing `-DMMDEPLOY_TORCHSCRIPT_SDK_BACKEND=ON` to `cmake`.
+
+Notice that `libtorch` is sensitive to C++ ABI versions. On platforms defaulted to C++11 ABI (e.g. Ubuntu 16+) one may
+pass `-DCMAKE_CXX_FLAGS="-D_GLIBCXX_USE_CXX11_ABI=0"` to `cmake` to use pre-C++11 ABI for building. In this case all
+dependencies with ABI sensitive interfaces (e.g. OpenCV) must be built with pre-C++11 ABI.
+
 ## FAQs
 
 - Error: `projects/thirdparty/libtorch/share/cmake/Caffe2/Caffe2Config.cmake:96 (message):Your installed Caffe2 version uses cuDNN but I cannot find the cuDNN libraries.  Please set the proper cuDNN prefixes and / or install cuDNN.`