尝试一在riscv里编译飞桨。
先总结：
下载飞桨代码，参照pr修改代码
然后编译
cmake ../ -DWITH_GPU=OFF -DWITH_RISCV=ON
make -j 16 TARGET=RISCV64_GENERIC编译好后安装：
pip install paddlepaddle-0.0.0-cp38-cp38-linux_riscv64.whl -i https://mirror.baidu.com/pypi/simple
先git下载源码
git clone https://github.com/paddlepaddle/padle
配置环境
pip3 install protobuf
还有一些库等，具体可以参考编译pytorch的文档：算能RISC-V通用云开发空间编译pytorch @openKylin留档-CSDN博客
然后进入paddle目录编译
mkdir build
cd build
cmake ../
我的天，除了protobuf，竟然一下子编译完成了！
python
Automatic code generation for paddle/fluid/primitive succeed.
Automatic code generation for decomp interface succeed.
WITH_DLNNE:
-- Configuring done
-- Generating done
-- Build files have been written to: /root/github/paddle/build是我肤浅了，后面还需要编译呢root@863c89a419ec:~/github/paddle/build# make
make -j 16
make -j 8 TARGET=RISCV64_GENERIC -dw
如果碰到报错，根据报错进行处理，比如哪个第三方库编译失败，就删除那个目录，然后在third_party目录执行：git submodule update --init --recursive
然后再make 即可。
困了，让它编译去吧。
报错了
通过官网issue，发现cmake指令为：
cmake ../ -DWITH_GPU=OFF -WITH_RISCV=ON
make 指令为;
make -j 16 TARGET=RISCV64_GENERIC
发现cmake指令有问题
拼写错误，应该是：
cmake ../ -DWITH_GPU=OFF -DWITH_RISCV=ON
然后再make
看MakeFile文件里面没有RISCV选项，不知道是不是cmake编译器那边支持，先执行看看。（后来知道，人家这个RISCV是对应了专门的pr的，目前这个pr还没有合并，所以需要手工改密码）
cmake结束之后提示WITH_RISCV没有生效
手工添加飞桨对riscv的支持
修改CMakeFile文件，在WITH_ARM的后面加上：
bash
if(WITH_RISCV)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
set(WITH_XBYAK
OFF
CACHE STRING "Disable XBYAK when compiling WITH_RISCV=ON." FORCE)
set(WITH_MKL
OFF
CACHE STRING "Disable MKL when compiling WITH_RISCV=ON." FORCE)
set(WITH_AVX
OFF
CACHE STRING "Disable AVX when compiling WITH_AVX=OFF." FORCE)
add_definitions(-DPADDLE_WITH_RISCV)
endif()修改文件：cmake/flags.cmake
在ARM后面加上：AND NOT WITH_RISCV
同时找到了-m64的位置。因为加了这句，就不用手工删除-m64这句。
修改文件：paddle/fluid/operators/search_compute.h
一共需要修改四处，在四处加上defined(PADDLE_WITH_RISCV)：
bash
#pragma once
#if !defined(PADDLE_WITH_ARM) && !defined(PADDLE_WITH_SW) && \
!defined(PADDLE_WITH_MIPS) && !defined(PADDLE_WITH_LOONGARCH)
!defined(PADDLE_WITH_MIPS) && !defined(PADDLE_WITH_LOONGARCH) && \
!defined(PADDLE_WITH_RISCV)
#include <immintrin.h>
#endif
#include <cfloat>
@@ -103,7 +104,8 @@ void call_gemm_batched(const framework::ExecutionContext& ctx,
}
#if !defined(PADDLE_WITH_ARM) && !defined(PADDLE_WITH_SW) && \
!defined(PADDLE_WITH_MIPS) && !defined(PADDLE_WITH_LOONGARCH)
!defined(PADDLE_WITH_MIPS) && !defined(PADDLE_WITH_LOONGARCH) && \
!defined(PADDLE_WITH_RISCV)
#define __m256x __m256
@@ -144,7 +146,8 @@ inline void axpy(const T* x, T* y, size_t len, const T alpha) {
_mm256_mul_px(mm_alpha, _mm256_load_px(x + jjj))));
}
#elif defined(PADDLE_WITH_ARM) || defined(PADDLE_WITH_SW) || \
defined(PADDLE_WITH_MIPS) || defined(PADDLE_WITH_LOONGARCH)
defined(PADDLE_WITH_MIPS) || defined(PADDLE_WITH_LOONGARCH) || \
defined(PADDLE_WITH_RISCV)
PADDLE_THROW(platform::errors::Unimplemented("axpy is not supported"));
#else
lll = len & ~SSE_CUT_LEN_MASK;
@@ -174,7 +177,8 @@ inline void axpy_noadd(const T* x, T* y, size_t len, const T alpha) {
_mm256_store_px(y + jjj, _mm256_mul_px(mm_alpha, _mm256_load_px(x + jjj)));
}
#elif defined(PADDLE_WITH_ARM) || defined(PADDLE_WITH_SW) || \
defined(PADDLE_WITH_MIPS) || defined(PADDLE_WITH_LOONGARCH)
defined(PADDLE_WITH_MIPS) || defined(PADDLE_WITH_LOONGARCH) || \
defined(PADDLE_WITH_RISCV)
PADDLE_THROW(platform::errors::Unimplemented("axpy_noadd is not supported"));
#else
lll = len & ~SSE_CUT_LEN_MASK;修改文件：paddle/fluid/platform/denormal.cc
33行if那句后面加上RISCV，变成这样：
bash
#if !defined(GCC_WITHOUT_INTRINSICS) && !defined(PADDLE_WITH_ARM) && \
!defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS) && \
!defined(_WIN32) && !defined(PADDLE_WITH_LOONGARCH) && \
!defined(PADDLE_WITH_RISCV)
#define DENORM_USE_INTRINSICS修改文件paddle/phi/backends/cpu/cpu_info.cc
bash
} else {
#if !defined(WITH_NV_JETSON) && !defined(PADDLE_WITH_ARM) && \
!defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS) && \
!defined(PADDLE_WITH_LOONGARCH) && !defined(PADDLE_WITH_RISCV)
std::array<int, 4> reg;
cpuid(reg.data(), 0);
int nIds = reg[0];修改文件paddle/phi/backends/cpu/cpu_info.h
bash
#define cpuid(reg, x) __cpuidex(reg, x, 0)
#else
#if !defined(WITH_NV_JETSON) && !defined(PADDLE_WITH_ARM) && \
!defined(PADDLE_WITH_SW) && !defined(PADDLE_WITH_MIPS) && \
!defined(PADDLE_WITH_LOONGARCH) && !defined(PADDLE_WITH_RISCV)
#include <cpuid.h>
inline void cpuid(int reg[4], int x) {感觉离曙光很近了。
重新cmake和make，希望不会碰到"pmmintrin.h"文件找不到的错误。
发现少修改一个文件
修改文件cmake/third_party.cmake
if(WITH_POCKETFFT)
include(external/pocketfft)
list(APPEND third_party_deps extern_pocketfft)
add_definitions(-DPADDLE_WITH_POCKETFFT)
if(WITH_RISCV)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-maybe-uninitialized") # Warnings in pocketfft_hdronly.h
endif()
endif()11点开始编译，计时开始！15：37分编译完成，耗时4小时37分钟！
哈哈，它静静的躺在那里：
root@863c89a419ec:~/github/paddle/build/python# ls dist/
paddlepaddle-0.0.0-cp38-cp38-linux_riscv64.whl
root@863c89a419ec:~/github/paddle/build/python# pip3 install dist/paddlepaddle-0.0.0-cp38-cp38-linux_riscv64.whl -i https://mirror.baidu.com/pypi/simple
Processing ./dist/paddlepaddle-0.0.0-cp38-cp38-linux_riscv64.whl安装：
bash
pip install paddlepaddle-0.0.0-cp38-cp38-linux_riscv64.whl安装后执行import paddle 报错。
总结：
目前已编译成功。
目前import paddle报错。
调试
报错：Could NOT find PY_google.protobuf (missing: PY_GOOGLE.PROTOBUF)
Could NOT find PY_google.protobuf (missing: PY_GOOGLE.PROTOBUF)
安装protobuf
pip3 install protobuf
编译时到100%报错
97%\] Building CXX object gloo/CMakeFiles/gloo.dir/transport/tcp/unbound_buffer.cc.o
\[100%\] Linking CXX static library libgloo.a
\[100%\] Built target gloo
\[ 3%\] Performing install step for 'extern_gloo'
\[ 3%\] Completed 'extern_gloo'
\[ 3%\] Built target extern_gloo
make: \*\*\* \[Makefile:136: all\] Error 2
再重新编译，到了protobuf这里报错：
-- Installing: /root/github/paddle/build/third_party/install/protobuf/lib/cmake/protobuf/protobuf-config.cmake
\[ 4%\] Completed 'extern_protobuf'
\[ 4%\] Built target extern_protobuf
make: \*\*\* \[Makefile:136: all\] Error 2
再重新编译，发现这里报错：
### 报错：cc1: error: '-march=loongson3a': ISA string must begin with rv32 or rv64
cc1: error: requested ABI requires '-march' to subsume the 'D' extension
cc1: error: ABI requires '-march=rv64'
make\[4\]: \*\*\* \[Makefile:737: isamin.o\] Error 1
cc1: error: '-march=loongson3a': ISA string must begin with rv32 or rv64
make\[4\]: \*\*\* \[Makefile:611: sasum.o\] Error 1
cc1: error: '-march=loongson3a': ISA string must begin with rv32 or rv64
cc1: error: '-march=loongson3a': ISA string must begin with rv32 or rv64
cc1: error: requested ABI requires '-march' to subsume the 'D' extension
cc1: error: requested ABI requires '-march' to subsume the 'D' extension
cc1: error: ABI requires '-march=rv64'
cc1: error: ABI requires '-march=rv64'
cc1: error: requested ABI requires '-march' to subsume the 'D' extension
cc1: error: ABI requires '-march=rv64'
make\[4\]: \*\*\* \[Makefile:647: snrm2.o\] Error 1
make\[4\]: \*\*\* \[Makefile:629: ssum.o\] Error 1
make\[4\]: \*\*\* \[Makefile:701: smax.o\] Error 1
make\[4\]: \*\*\* \[Makefile:665: samax.o\] Error 1
make\[4\]: \*\*\* \[Makefile:755: ismax.o\] Error 1
make\[4\]: \*\*\* \[Makefile:773: sdsdot.o\] Error 1
make\[3\]: \*\*\* \[Makefile:164: libs\] Error 1
make\[2\]: \*\*\* \[CMakeFiles/extern_openblas.dir/build.make:86: third_party/openblas/src/extern_openblas-stamp/extern_openblas-build\] Error 2
make\[1\]: \*\*\* \[CMakeFiles/Makefile2:4001: CMakeFiles/extern_openblas.dir/all\] Error 2
\[ 5%\] Built target eager_python_c_codegen
\[ 5%\] Built target op_map_codegen
\[ 5%\] Built target eager_codegen
make: \*\*\* \[Makefile:136: all\] Error 2
参考这里重新来过：
[如何在RISC-V平台编译paddle - 知乎](https://zhuanlan.zhihu.com/p/655278471 "如何在RISC-V平台编译paddle - 知乎")
### 编译报错：
Live child 0x2af978fd70 (paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen) PID 115530
Reaping winning child 0x2af978fd70 PID 115530
Removing child 0x2af978fd70 PID 115530 from chain.
Considering target file 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/build'.
File 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/build' does not exist.
Considering target file 'eager_codegen'.
File 'eager_codegen' does not exist.
Considering target file 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen'.
File 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen' was considered already.
Considering target file 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/build.make'.
File 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/build.make' was considered already.
Finished prerequisites of target file 'eager_codegen'.
Must remake target 'eager_codegen'.
Successfully remade target file 'eager_codegen'.
Finished prerequisites of target file 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/build'.
Must remake target 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/build'.
Successfully remade target file 'paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/build'.
make\[2\]: Leaving directory '/root/github/paddle/build'
Reaping winning child 0x2b00eb0510 PID 115266
Live child 0x2b00eb0510 (paddle/fluid/eager/auto_code_generator/generator/CMakeFiles/eager_codegen.dir/all) PID 115532
\[ 4%\] Built target eager_codegen
Reaping winning child 0x2b00eb0510 PID 115532
Removing child 0x2b00eb0510 PID 115532 from chain.
make\[1\]: Leaving directory '/root/github/paddle/build'
Reaping losing child 0x2ad05e7c50 PID 115118
make: \*\*\* \[Makefile:136: all\] Error 2
Removing child 0x2ad05e7c50 PID 115118 from chain.
make: Leaving directory '/root/github/paddle/build'
在paddle/build/third_party删除eigen3目录，然后执行：git submodule update --init --recursive
问题解决。
问题没有解决，还是4%这里报错：
\[ 4%\] Built target eager_codegen
Reaping winning child 0x2b167efa70 PID 117670
Removing child 0x2b167efa70 PID 117670 from chain.
make\[1\]: Leaving directory '/root/github/paddle/build'
Reaping losing child 0x2b0332dc20 PID 117206
make: \*\*\* \[Makefile:136: all\] Error 2
Removing child 0x2b0332dc20 PID 117206 from chain.
make: Leaving directory '/root/github/paddle/build'
重新设置make 后，cmake ../ -DWITH_GPU=OFF -WITH_RISCV=ON 编译报错
### 报错c++: error: unrecognized command line option '-m64'
按照文档，应该"查找makefile文件的生成逻辑，最终发现在Paddle.cmake文件中有这样一段逻辑"，将该文件中的-64去掉。
但是没有找到这个文件。找到了，在这里：
cmake/flags.cmake
if(NOT WITH_NV_JETSON
AND NOT WITH_ARM
AND NOT WITH_RISCV
AND NOT WITH_SW
AND NOT WITH_MIPS
AND NOT WITH_LOONGARCH)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")
endif()
后期通过修改源码，添加RISCV选项的方法，使代码支持RISCV，并同时使用-m64失效
### 在cmake的时候加上DWITH_RISCV提示没有生效
WITH_DLNNE:
-- Configuring done
-- Generating done
CMake Warning:
Manually-specified variables were not used by the project:
WITH_RISCV
按照飞桨官网pr，修改飞桨make相关文件。
### 编译报错没有 pmmintrin.h文件
\[ 7%\] Building CXX object paddle/fluid/platform/CMakeFiles/denormal.dir/denormal.cc.o
/root/github/paddle/paddle/fluid/platform/denormal.cc:38:10: fatal error: pmmintrin.h: No such file or directory
38 \| #include \