cmake找不到用vcpkg安装的库

Question

我想在Windows的CMake项目中使用vcpkg，因为我需要boost和xerces，它们都由这个包管理器处理。

我有以下CMakeLists.txt：

cmake_minimum_required (VERSION 3.12.0)

project (myproj)

set (CMAKE_PREFIX_PATH ${XERCES_ROOT})
set (Boost_USE_STATIC_LIBS ON)
set (Boost_USE_MULTITHREADED ON)
unset (Boost_INCLUDE_DIR CACHE)
unset (Boost_LIBRARY_DIRS CACHE)

# set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/modules)
find_package (Boost COMPONENTS filesystem regex REQUIRED)
find_package (XercesC CONFIG REQUIRED)

set (CMAKE_INCLUDE_CURRENT_DIR ON)
message (STATUS "binary dir is ${CMAKE_BINARY_DIR}")
include_directories (${CMAKE_BINARY_DIR}/${PROJECT_NAME}/)
include_directories (${CMAKE_CURRENT_SOURCE_DIR}/..)
include_directories (${Boost_INCLUDE_DIRS})
include_directories (${XercesC_INCLUDE_DIRS})

set (PROJECT_SRC
  code.cpp
  )

add_library (${PROJECT_NAME} SHARED ${PROJECT_SRC})
add_dependencies (${PROJECT_NAME} UPDATE_RESOURCES)
target_link_libraries (${PROJECT_NAME} ${Boost_LIBRARIES} XercesC::XercesC)

Boost和xerces-c与vcpkg一起安装。因为我正在使用Visual Studio Code我在vcpkg中设置settings.json变量：

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

当我运行che CMake时，我获得以下错误：

[cmake] CMake Error at C:/Program Files/CMake/share/cmake-3.14/Modules/FindBoost.cmake:2132 (message):
[cmake]   Unable to find the requested Boost libraries.
[cmake] 
[cmake]   Unable to find the Boost header files.  Please set BOOST_ROOT to the root
[cmake]   directory containing Boost or BOOST_INCLUDEDIR to the directory containing
[cmake]   Boost's headers.
[cmake] Call Stack (most recent call first):
[cmake]   D:/projects/vcpkg/scripts/buildsystems/vcpkg.cmake:233 (_find_package)
[cmake]   src/myroject/CMakeLists.txt:24 (find_package)
[cmake] 
[cmake] 
[cmake] CMake Error at D:/Projects/vcpkg/installed/x64-windows/share/xercesc/vcpkg-cmake-wrapper.cmake:1 (_find_package):
[cmake]   Could not find a package configuration file provided by "XercesC" with any
[cmake]   of the following names:
[cmake] 
[cmake]     XercesCConfig.cmake
[cmake]     xercesc-config.cmake
[cmake] 
[cmake]   Add the installation prefix of "XercesC" to CMAKE_PREFIX_PATH or set
[cmake]   "XercesC_DIR" to a directory containing one of the above files.  If
[cmake]   "XercesC" provides a separate development package or SDK, be sure it has
[cmake]   been installed.
[cmake] Call Stack (most recent call first):
[cmake]   D:/Projects/vcpkg/scripts/buildsystems/vcpkg.cmake:189 (include)
[cmake]   src/ZLA/CMakeLists.txt:25 (find_package)
[cmake] 
[cmake] 
[cmake] Configuring incomplete, errors occurred!
[cmake] See also "D:/Projects/zla/build/vscode/CMakeFiles/CMakeOutput.log".
[cms-driver] Error during CMake configure: [cmake-server] Configuration failed.

目前我已经使用vcpkg命令安装了xerces，而当前没有安装boost，但我期望在执行cmake命令期间，vcpkg将下载并构建所需的构建包。

我也尝试过命令行：

 cmake -DCMAKE_TOOLCHAIN_FILE=D:/Projects/vcpkg/scripts/buildsystems/vcpkg.cmake -DVCPKG_TARGET_TRIPLET=x64-windows ../

但结果是一样的。

我做错了什么？如何成功使用vcpkg？

Answer 1

目前尚未安装boost，但我期望在执行cmake命令期间，vcpkg将下载并构建所需的构建包。

据我所知，情况并非如此。您需要事先为vcpkg安装所需的软件包以用于您计划使用的三元组（即x64-windows）。然后，您需要确保在运行CMake时使用正确的三元组（检查VCPKG_TARGET_TRIPLET中的CMakeCache.txt变量）。如果不正确，您可以更改它并使用CMake重新配置。

此外，根据你得到的错误输出，似乎没有使用xerces正确安装vcpkg。您可以通过运行以下命令来检查vcpkg的安装内容：

vcpkg list --triplet x64-windows