CMake + vcpkg + vscode

1. CMake 3.27.7
2. CMake Tools
3. VSCode

安裝的部份就跳過了，使用 Windows 和 boost::filesystem 當例子。

Key takeaways

vcpkg

使用 manifest mode，不開 vcpkg global integration。在 workspace root 下產生 vcpkg.json。

{
    "$schema":  "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",
    "name":  "test",
    "version":  "0.1.0",
    "dependencies":  [
        "boost-filesystem"
    ]
}

CMake

修改 .vscode/settings.json 讓 CMake 可以使用 vcpkg。

{
    "cmake.configureSettings": {
        "CMAKE_TOOLCHAIN_FILE": "you-path-to-vcpk/scripts/buildsystems/vcpkg.cmake",
        "VCPKG_TARGET_TRIPLET": "x64-windows"
    }
}

CMake

find_package(Boost REQUIRED COMPONENTS filesystem)

if(Boost_FOUND)
    include_directories(${Boost_INCLUDE_DIRS})
    target_link_libraries(hello PRIVATE ${Boost_LIBRARIES})
else()
    message(FATAL_ERROR "Boost not found. Please install Boost.")
endif()

Troubleshooting

Boost Not Found

1. 先清掉 CMake cache 試試看：如果過程中，已經反覆 CMake -G 過，可能受到 CMake cache 影響，導致 find_package(Boost, ...) 不會再重頭開始找。

2. 修改 .vscode/settings.json已開啟 CMake find boost debug log，方法如下：

   {
       "cmake.configureSettings": {
           ...
           "Boost_DEBUG": "on"
       }
   }
   

3. 放棄 vscode ，繞過 CMake tool extension 的部份。

Reference

1. vcpkg in CMake projects

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