CMake[支持交叉编译](https://cmake.org/cmake/help/v3.0/manual/cmake-toolchains.7.html#cross-compiling)。PaddlePaddle for Raspberry Pi的配置信息在[cmake/cross_compiling/raspberry_pi.cmake](https://github.com/PaddlePaddle/Paddle/blob/develop/cmake/cross_compiling/raspberry_pi.cmake)。
You may use any of the following two approaches to build the inference library of PaddlePaddle for Raspberry Pi:
1. Build using SSH: Log in to a Raspberry Pi using SSH and build the library. The required development tools and third-party dependencies are listed in here: [`/Dockerfile`](https://github.com/PaddlePaddle/Paddle/blob/develop/Dockerfile).
1. Cross-compile: We talk about how to cross-compile PaddlePaddle for Raspberry Pi on a Linux/x64 machine, in more detail in this article.
## The Cross-Compiling Toolchain
Step 1. Clone the Github repo by running the following command.
Step 2. Use the pre-built cross-compiler found in `./tools/tree/master/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64`. To run it on a Linux computer, glibc version >= 2.14 is needed.
## CMake Arguments
CMake supports [cross-compiling](https://cmake.org/cmake/help/v3.0/manual/cmake-toolchains.7.html#cross-compiling). All CMake configuration arguments required for the cross-compilation for Raspberry Pi can be found in [`cmake/cross_compiling/raspberry_pi.cmake`](https://github.com/PaddlePaddle/Paddle/blob/develop/cmake/cross_compiling/raspberry_pi.cmake).
Some important arguments that need to be set:
-`CMAKE_SYSTEM_NAME`: The target platform. Must be `RPi`.
-`RPI_TOOLCHAIN`: The absolute path of the cross-compiling toolchain.
-`RPI_ARM_NEON`: Use ARM NEON Intrinsics. This is a required argument and set default to `ON`.
-`HOST_C/CXX_COMPILER`: The C/C++ compiler for the host. It is used to build building tools running on the host, for example, protoc.
A commonly-used CMake configuration is as follows:
To build the inference library, please set the argument WITH_API to ON: `WITH_C_API=ON`.
You can add more arguments. For example, to minimize the size of the generated inference library, you may use `CMAKE_BUILD_TYPE=MinSizeRel`. For performance optimization, you may use `CMAKE_BUILD_TYPE=Release`.
## Build and Install
The following commands build the inference library of PaddlePaddle for Raspberry Pi and third-party dependencies.
```bash
make
make install
```
The intermediate files will be stored in `build`. Third-party libraries will be located in `build/third_party`. If you have already built it for other platforms like Android or iOS, you may want to clear these directories by running the command: `rm -rf build`.
The infernece library will be in `your/path/to/install/lib`, with related header files in `your/path/to/install/include`.
@@ -52,7 +52,11 @@ class TopkOpMaker : public framework::OpProtoAndCheckerMaker {
AddOutput("Out","The output tensor of Topk op");
AddOutput("Indices","The indices of Topk elements of input");
AddComment(
R"DOC(If the input is a vector (1d tensor), finds the k largest entries in the vector and outputs their values and indices as vectors. Thus values[j] is the j-th largest entry in input, and its index is indices[j].
R"DOC(If the input is a vector (1d tensor),
finds the k largest entries in the vector
and outputs their values and indices as vectors.
Thus values[j] is the j-th largest entry in input,
and its index is indices[j].
For matrices, computes the top k entries in each row. )DOC");
AddAttr<int>("k",
...
...
@@ -66,6 +70,7 @@ class TopkOpMaker : public framework::OpProtoAndCheckerMaker {
