Fix core so name mismatch error

[chenwhql]

PR types

Bug fixes

PR changes

Others

Describe

Fix core so name mismatch error

paddle编译完成后，将libpaddle_pybind.so copy为core_(no)avx.so，但是并没有更新其soname，其soname仍然是libpaddle_pybind.so，这导致外部链接的时候会找不到的libpaddle_pybind.so，示例如下

• core_avx.so信息
  
• 编译完自定义算子so的链接信息
  

因此本PR修复该问题，修复之后，core_avx.so信息如下：

该问题修复后，可以基于安装后的paddle phi c++ API在外部编译可执行文件，示例如下：

• CMakeLists.txt

cmake_minimum_required(VERSION 3.14)
project(tensortest LANGUAGES CXX)

find_package(Threads REQUIRED)

find_package (PythonLibs REQUIRED PATH /work/dev3/paddle/build_venv/bin/python/lib)
message(STATUS "PYTHON_LIBRARIES = ${PYTHON_LIBRARIES}")

find_package(pybind11 CONFIG)
message(STATUS "Pybind11_INCLUDES = ${pybind11_INCLUDE_DIRS}, pybind11_LIBRARIES=${pybind11_LIBRARIES}, pybind11_DEFINITIONS=${pybind11_DEFINITIONS}")

set(link_libraries
/usr/local/python3.7.0/lib/libpython3.7m.so.1.0
-l:core_avx.so)

set(include_dirs
${pybind11_INCLUDE_DIRS}
/work/dev3/paddle/build_venv/lib/python3.7/site-packages/paddle/include/)

set(link_libraries_path
${CMAKE_SOURCE_DIR}
/work/dev3/paddle/build_venv/lib/python3.7/site-packages/paddle/libs/
/work/dev3/paddle/build_venv/lib/python3.7/site-packages/paddle/fluid/)

include_directories(${include_dirs})
link_directories(${link_libraries_path})

set(name main)
set(source main.cc)
add_executable(${name} ${source})
target_link_libraries(${name} ${link_libraries})

• main.cc

#include "paddle/extension.h"

int main (){
    std::cout << "Run Start" << std::endl;

    auto a = paddle::full({3, 4}, 2.0);
    auto b = paddle::full({4, 5}, 3.0);
    auto out = paddle::matmul(a, b);

    std::cout << "Run End" << std::endl;
}

• 执行结果：

Run Start
Run End

patchelf 命令

patchelf 是一个用来修改elf格式的动态库和可执行程序的小工具，可以修改动态链接库的库名字，以及链接库的RPATH。

打印出动态库的soname

patchelf --print-soname xxx.so

修改动态库的soname

patchelf --set-soname oldxxx.so newxxx.so

查看并修改第三方依赖库

patchelf --print-needed xxx.so

patchelf --replace-needed oldxxx.so newxxx.so this.so

修改rpath

patchelf --set-rpath '$ORIGIN/' main

[paddle-bot-old]

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[zhwesky2010]

这个会再创建一个软链接吗 还是直接改名字

[chenwhql]

不会，直接改名字

[Aurelius84]

LGTM

[zh794390558]

LGTM