我想在我的archlinux上使用drogon framework for Windows编译C++ http服务器。我在官方的cmake文档中读到了可能的方法：
https://cmake.org/cmake/help/book/mastering-cmake/chapter/Cross%20Compiling%20With%20CMake.html
我已经安装了所有需要的mingw 64-* 实用程序，并面临的问题，在专门的-DCMAKE_TOOLCHAIN_FILE cmake没有更多的可以找到Drogon包与find_package（）命令。
这是我的主CMakeList.txt

cmake_minimum_required(VERSION 3.5)
project(lru_server CXX)

include(CheckIncludeFileCXX)

check_include_file_cxx(any HAS_ANY)
check_include_file_cxx(string_view HAS_STRING_VIEW)
check_include_file_cxx(coroutine HAS_COROUTINE)
if (NOT "${CMAKE_CXX_STANDARD}" STREQUAL "")
    # Do nothing
elseif (HAS_ANY AND HAS_STRING_VIEW AND HAS_COROUTINE)
    set(CMAKE_CXX_STANDARD 20)
elseif (HAS_ANY AND HAS_STRING_VIEW)
    set(CMAKE_CXX_STANDARD 17)
else ()
    set(CMAKE_CXX_STANDARD 14)
endif ()

set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

add_executable(${PROJECT_NAME} main.cpp)
target_include_directories(${PROJECT_NAME} PUBLIC
    lru_cache/
    endpoints/
)

target_sources( ${PROJECT_NAME} PUBLIC
    lru_cache/lru_cache.cpp
    endpoints/ApiController.cpp
)

find_package(Drogon CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE Drogon::Drogon)

if (CMAKE_CXX_STANDARD LESS 17)
    # With C++14, use boost to support any, string_view and filesystem
    message(STATUS "use c++14")
    find_package(Boost 1.61.0 REQUIRED)
    target_link_libraries(${PROJECT_NAME} PUBLIC Boost::boost)
elseif (CMAKE_CXX_STANDARD LESS 20)
    message(STATUS "use c++17")
else ()
    message(STATUS "use c++20")
endif ()

aux_source_directory(controllers CTL_SRC)
aux_source_directory(filters FILTER_SRC)
aux_source_directory(plugins PLUGIN_SRC)
aux_source_directory(models MODEL_SRC)

drogon_create_views(${PROJECT_NAME} ${CMAKE_CURRENT_SOURCE_DIR}/views
                    ${CMAKE_CURRENT_BINARY_DIR})

target_include_directories(${PROJECT_NAME}
                           PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
                                   ${CMAKE_CURRENT_SOURCE_DIR}/models)
target_sources(${PROJECT_NAME}
               PRIVATE
               ${SRC_DIR}
               ${CTL_SRC}
               ${FILTER_SRC}
               ${PLUGIN_SRC}
               ${MODEL_SRC})

工具链文件：

# the name of the target operating system
set(CMAKE_SYSTEM_NAME Windows)

# which compilers to use for C and C++
set(CMAKE_C_COMPILER   x86_64-w64-mingw32-gcc)
set(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++)

# where is the target environment located
set(CMAKE_FIND_ROOT_PATH 
    /usr/x86_64-w64-mingw32    
    /usr/x86_64-w64-mingw32/lib
    /usr/lib
    /usr/lib/cmake
    /usr/lib/cmake/Drogon)

# adjust the default behavior of the FIND_XXX() commands:
# search programs in the host environment
# set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)

# search headers and libraries in the target environment
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

cmake -S /my_project_dir -B build-lru_server-MinGW64 -DCMAKE_TOOLCHAIN_FILE=/toolchain-mingw.cmake
不带-DCMAKE_TOOLCHAIN_FILE的情况下都可以工作（使用clang++ compiller）。
cmake输出错误：

[20:01:45] @archlinux bin$ cmake -S /var/repo/lru_cpp_rest_server/lru_server -B /var/repo_build/lru_cpp_rest_server/build-lru_server-MinGW64 -DCMAKE_TOOLCHAIN_FILE=/var/repo/lru_cpp_rest_server/lru_server/TC-mingw.cmake
CMake Warning (dev) at CMakeLists.txt:29 (target_sources):
  Policy CMP0076 is not set: target_sources() command converts relative paths
  to absolute.  Run "cmake --help-policy CMP0076" for policy details.  Use
  the cmake_policy command to set the policy and suppress this warning.

  An interface source of target "lru_server" has a relative path.
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error at CMakeLists.txt:42 (find_package):
  Could not find a package configuration file provided by "Drogon" with any
  of the following names:

    DrogonConfig.cmake
    drogon-config.cmake

  Add the installation prefix of "Drogon" to CMAKE_PREFIX_PATH or set
  "Drogon_DIR" to a directory containing one of the above files.  If "Drogon"
  provides a separate development package or SDK, be sure it has been
  installed.

为什么当我使用工具链drogon和其他安装在系统上的文件找不到？
UPD：在@Tsyvarev的建议之后

[22:19:01] alxndrklbk@archlinux bin$ cmake -S /var/repo/lru_cpp_rest_server/lru_server/ -B build-lru_server-MinGW-Debug -DCMAKE_TOOLCHAIN_FILE=/var/repo/lru_cpp_rest_server/lru_server/TC-mingw.cmake
-- The CXX compiler identification is GNU 12.2.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/x86_64-w64-mingw32-gcc - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for C++ include any
-- Looking for C++ include any - found
-- Looking for C++ include string_view
-- Looking for C++ include string_view - found
-- Looking for C++ include coroutine
-- Looking for C++ include coroutine - not found
CMake Warning (dev) at CMakeLists.txt:29 (target_sources):
  Policy CMP0076 is not set: target_sources() command converts relative paths
  to absolute.  Run "cmake --help-policy CMP0076" for policy details.  Use
  the cmake_policy command to set the policy and suppress this warning.

  An interface source of target "lru_server" has a relative path.
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Found Jsoncpp: /usr/x86_64-w64-mingw32/include  
CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
  system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY
  OPENSSL_INCLUDE_DIR)
Call Stack (most recent call