Windows下安装libtorch与Clion配置

news2025/1/17 3:00:08

Windows 安装和使用libtorch

1.下载libtorch

libtorch的下载链接，如下图所示，libtorch有release和debug版本可以选择。为了方便调试，下debug版。电脑上没CUDA，下次有需要再更新吧。

在这里插入图片描述

2.libtorch使用

在Visual Studio的使用可以参考博客[1]，本人使用Clion，下面是Clion是配置方式。

创建新项目，目录如图，打开CmakeList

按照官方文档，填写CMakeLists.txt,其中E:/libtorch是我的解压路径，改为自己的就好。

set(CMAKE_PREFIX_PATH E:/libtorch)
#set(Torch_DIR "E:/libtorch/share/cmake/Torch")
#include_directories("E:/libtorch/include")
#include_directories("E:/libtorch/include/torch/csrc/api/include")
find_package(Torch REQUIRED )

add_executable(Cpp_Libtorch_CRN main.cpp)
target_link_libraries(Cpp_Libtorch_CRN "${TORCH_LIBRARIES}")
set_property(TARGET Cpp_Libtorch_CRN PROPERTY CXX_STANDARD 14)

if (MSVC)
    file(GLOB TORCH_DLLS "${TORCH_INSTALL_PREFIX}/lib/*.dll")
    add_custom_command(TARGET Cpp_Libtorch_CRN
            POST_BUILD
            COMMAND ${CMAKE_COMMAND} -E copy_if_different
            ${TORCH_DLLS}
            $<TARGET_FILE_DIR:Cpp_Libtorch_CRN>)
endif (MSVC)

3. 错误与解决

错误1

讲道理到这里就可以了，但是报错了，错误信息如下。找了好多博客文档，要么在unix上配置，要么在vs上配置。在windows-clion上的没找到。这里报了个莫名的错误，在知乎找到一篇同样错误的，多久了也不放后续，麻了。（不放解决方法，就单纯为了记录错误？记录意义是什么呢？吐槽一下）

"E:\CLion 2022.2.4\bin\cmake\win\bin\cmake.exe" -DCMAKE_BUILD_TYPE=Debug "-DCMAKE_MAKE_PROGRAM=E:/CLion 2022.2.4/bin/ninja/win/ninja.exe" -G Ninja -S C:\Users\65181\CLionProjects\Cpp_Libtorch_CRN -B C:\Users\65181\CLionProjects\Cpp_Libtorch_CRN\cmake-build-debug
-- The C compiler identification is GNU 11.2.0
-- The CXX compiler identification is GNU 11.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: E:/CLion 2022.2.4/bin/mingw/bin/gcc.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: E:/CLion 2022.2.4/bin/mingw/bin/g++.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE  
-- Found Torch: E:/libtorch/lib/torch.lib  
-- Configuring done
-- Generating done
-- Build files have been written to: C:/Users/65181/CLionProjects/Cpp_Libtorch_CRN/cmake-build-debug

Problems were encountered while collecting compiler information:
	cc1plus.exe: fatal error: /Z7: No such file or directory
	cc1plus.exe: fatal error: /EHsc: No such file or directory
	cc1plus.exe: fatal error: /DNOMINMAX: No such file or directory
	cc1plus.exe: fatal error: /wd4267: No such file or directory
	cc1plus.exe: fatal error: /wd4251: No such file or directory
	cc1plus.exe: fatal error: /wd4522: No such file or directory
	cc1plus.exe: fatal error: /wd4838: No such file or directory
	cc1plus.exe: fatal error: /wd4305: No such file or directory
	cc1plus.exe: fatal error: /wd4244: No such file or directory
	cc1plus.exe: fatal error: /wd4190: No such file or directory
	cc1plus.exe: fatal error: /wd4101: No such file or directory
	cc1plus.exe: fatal error: /wd4996: No such file or directory
	cc1plus.exe: fatal error: /wd4275: No such file or directory
	cc1plus.exe: fatal error: /bigobj: No such file or directory

[Finished]

解决方法：

咨询了一下用过的同学，他之前在mac上配的，但是也是和我一样用的mingw64，说似乎是libtorch不支持wingw？具体也不清楚。于是还是没逃过下载vs的命运（可以单独下msvc但是麻烦）。
下载之后在Setting->Build,Execution,Deployment->ToolChains里面添加编译器，选择Visual Studio，正常安装好VS之后会自动查找地址，不行就自己指定一下。
在这里插入图片描述
错误2

====================[ Build | Cpp_Libtorch_CRN | Debug ]========================
"E:\CLion 2022.2.4\bin\cmake\win\bin\cmake.exe" --build C:\Users\65181\CLionProjects\Cpp_Libtorch_CRN\cmake-build-debug --target Cpp_Libtorch_CRN -j 6
[1/2] Building CXX object CMakeFiles\Cpp_Libtorch_CRN.dir\main.cpp.obj
FAILED: CMakeFiles/Cpp_Libtorch_CRN.dir/main.cpp.obj 
C:\PROGRA~1\MICROS~2\2022\PROFES~1\VC\Tools\MSVC\1434~1.319\bin\Hostx86\x86\cl.exe  /nologo /TP -DUSE_C10D_GLOO -DUSE_DISTRIBUTED -external:IE:\libtorch\include -external:IE:\libtorch\include\torch\csrc\api\include -external:W0 /DWIN32 /D_WINDOWS /EHsc /Zi /Ob0 /Od /RTC1 -MDd /Z7 /EHsc /DNOMINMAX /wd4267 /wd4251 /wd4522 /wd4838 /wd4305 /wd4244 /wd4190 /wd4101 /wd4996 /wd4275 /bigobj /showIncludes /FoCMakeFiles\Cpp_Libtorch_CRN.dir\main.cpp.obj /FdCMakeFiles\Cpp_Libtorch_CRN.dir\ /FS -c C:\Users\65181\CLionProjects\Cpp_Libtorch_CRN\main.cpp
cl: 命令行 warning D9025 :正在重写“/Zi”(用“/Z7”)
E:\libtorch\include\c10/util/safe_numerics.h(25): error C3861: “_addcarry_u64”: 找不到标识符
ninja: build stopped: subcommand failed.

解决方法
似乎是这个函数在32位里是没有的，所以要编译64位的，还是按这个图中Architecture改为64就可以了。
在这里插入图片描述

4. 测试样例

写一个官方的测试样例,到这里就可以用了。后面不知道还会出什么幺蛾子，先用着到时候再说了

#include <torch/torch.h>
#include <iostream>

int main() {
    std::cout << 1 << std::endl;
    torch::Tensor a = torch::rand({2, 3});
    std::cout << a << std::endl;
}
==>
1
 0.3635  0.2281  0.2088
 0.2662  0.0971  0.0297
[ CPUFloatType{2,3} ]

Process finished with exit code 0