如何修复“Vcpkg/CMake无法确定目标架构”的问题（Windows10、vcpkg、clion、cmake）

Question

我想使用这个库，见：https://github.com/jtv/libpqxx

我决定安装这个库管理器vcpkg，见：https://github.com/microsoft/vcpkg

我将CMake选项设置为"CMake项目应使用："-DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/vcpkg/scripts/buildsystems/vcpkg.cmake""

这是错误信息：

"C:\Program Files\JetBrains\CLion 2019.1.4\bin\cmake\win\bin\cmake.exe"     -DCMAKE_BUILD_TYPE=Debug -DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/vcpkg/scripts   /buildsystems/vcpkg.cmake -G "CodeBlocks - MinGW Makefiles" C:\Users  \Vaio\CLionProjects\untitled
CMake Warning at C:/vcpkg/vcpkg/scripts/buildsystems/vcpkg.cmake:68   (message):
Unable to determine target architecture, continuing without vcpkg.
Call Stack (most recent call first):
cmake-build-debug-mingw/CMakeFiles/3.14.3/CMakeSystem.cmake:6 (include)
CMakeLists.txt:2 (project)

对应的 CMake 代码如下：

if(VCPKG_TARGET_TRIPLET)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Ww][Ii][Nn]32$")
    set(_VCPKG_TARGET_TRIPLET_ARCH x86)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Xx]64$")
    set(_VCPKG_TARGET_TRIPLET_ARCH x64)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]$")
    set(_VCPKG_TARGET_TRIPLET_ARCH arm)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]64$")
    set(_VCPKG_TARGET_TRIPLET_ARCH arm64)
else()
    if(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015 Win64$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x64)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015 ARM$")
        set(_VCPKG_TARGET_TRIPLET_ARCH arm)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x86)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 15 2017 Win64$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x64)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 15 2017 ARM$")
        set(_VCPKG_TARGET_TRIPLET_ARCH arm)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 15 2017$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x86)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 16 2019$")
        if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^[Xx]86$")
            set(_VCPKG_TARGET_TRIPLET_ARCH x86)
        elseif(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^[Aa][Mm][Dd]64$")
            set(_VCPKG_TARGET_TRIPLET_ARCH x64)
        elseif(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^[Aa][Rr][Mm]$")
            set(_VCPKG_TARGET_TRIPLET_ARCH arm)
        elseif(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^[Aa][Rr][Mm]64$")
            set(_VCPKG_TARGET_TRIPLET_ARCH arm64)
        else()

        endif()
    else()
        find_program(_VCPKG_CL cl)
        if(_VCPKG_CL MATCHES "amd64/cl.exe$" OR _VCPKG_CL MATCHES "x64/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH x64)
        elseif(_VCPKG_CL MATCHES "arm/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH arm)
        elseif(_VCPKG_CL MATCHES "arm64/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH arm64)
        elseif(_VCPKG_CL MATCHES "bin/cl.exe$" OR _VCPKG_CL MATCHES "x86/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH x86)
        elseif(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "x86_64")
            set(_VCPKG_TARGET_TRIPLET_ARCH x64)
        else()
            if( _CMAKE_IN_TRY_COMPILE )
                message(STATUS "Unable to determine target architecture, continuing without vcpkg.")
            else()
                message(WARNING "Unable to determine target architecture, continuing without vcpkg.")
            endif()
            set(VCPKG_TOOLCHAIN ON)
            return()
        endif()
    endif()
endif()

以下是我所做的步骤：

1. 安装Visual Studio 2019
2. 安装GIT
3. 安装CMake
4. 安装vcpkg，请参阅：https://github.com/microsoft/vcpkg，执行命令：.\bootstrap-vcpkg.bat，然后运行：vcpkg install libpqxx --triplet x64-windows
5. 运行：vcpkg list // 查看是否安装成功
6. 运行：vcpkg integrate install
7. 在CLion/CMake中指定-DCMAKE-TOOLCHAIN-FILE

我正在使用MinGW/GNU编译器。

我有什么遗漏了吗？或者为什么无法找到我的目标架构？这是我的环境变量。

请注意：在Visual Studio 2019中一切正常。

- Ojav

---

看起来MinGW+vcpkg并没有得到官方支持，请参见https://github.com/Microsoft/vcpkg/issues/3752了解详情，https://github.com/microsoft/vcpkg/issues/4418#issuecomment-428168157进行解释（您需要创建mingw工具链文件）。 - R2RT

Answer 1

在-DCMAKE_TOOLCHAIN_FILE之前添加-DVCPKG_TARGET_TRIPLET=x64-windows，然后它就可以工作了。

解决方案链接：https://vcpkg.readthedocs.io/en/latest/users/integration/

使用CMake时，您可以在配置行上设置VCPKG_TARGET_TRIPLET：

cmake ../my/project -DVCPKG_TARGET_TRIPLET=x64-windows-static -DCMAKE_TOOLCHAIN_FILE=...

如果您使用VCPKG_DEFAULT_TRIPLET环境变量来控制vcpkg命令行中未限定的三元组，您可以在CMake中默认VCPKG_TARGET_TRIPLET。使用环境变量而不是命令行选项：

if(DEFINED ENV{VCPKG_DEFAULT_TRIPLET} AND NOT DEFINED VCPKG_TARGET_TRIPLET)
  set(VCPKG_TARGET_TRIPLET "$ENV{VCPKG_DEFAULT_TRIPLET}" CACHE STRING "")
endif()

- Ojav