предварителни бележки
Докато разглеждаме подробностите, ето няколко предварителни коментара:
- Използвайте различна директория за
SOURCE_DIR
иBINARY_DIR
- Вместо
CMAKE_ARG
, предпочитайтеCMAKE_CACHE_ARGS
libbson-1.0_DIR
НЕ трябва да се задава на изходна директория, вместо това if трябва да се задава на директория за компилиране, съдържащаconfig-file
пакет (връзката по-долу предоставя повече подробности за тази концепция)- Уверете се, че винаги посочвате типа на аргумента CMake (
-DCMAKE_CXX_COMPILER:PATH=${CMAKE_CXX_COMPILER}
вместо-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
) - Не задавайте
CMAKE_BUILD_TYPE
за мултиконфигурационен генератор
По отношение на тази последна точка, това означава, че трябва да направите следното:
set(EXTERNAL_PROJECT_OPTIONAL_CMAKE_CACHE_ARGS)
if(NOT DEFINED CMAKE_CONFIGURATION_TYPES)
list(APPEND EXTERNAL_PROJECT_OPTIONAL_CMAKE_CACHE_ARGS
-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
)
endif()
В тази публикация можете да научите как бихте могли да структурирате своя проект:Правилен начин за използване на библиотеки на трети страни в проекта cmake
работен проект, позволяващ компилиране на mongocxx "test.cpp"
По-долу е съдържанието на CMakeLists.txt
и test.cpp
позволявайки изграждането на изпълним файл с име <build-dir>/Test-build/test_mongocxx
:
-
CMakeLists.txt:
cmake_minimum_required(VERSION 3.12) set(CMAKE_CXX_STANDARD 11) project(Test) option(${PROJECT_NAME}_SUPERBUILD "Build ${PROJECT_NAME} and the projects it depends on." ON) if(${PROJECT_NAME}_SUPERBUILD) include(ExternalProject) set(common_cmake_cache_args -DCMAKE_CXX_COMPILER:PATH=${CMAKE_CXX_COMPILER} ) if(NOT DEFINED CMAKE_CONFIGURATION_TYPES) list(APPEND common_cmake_cache_args -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE} ) endif() ExternalProject_Add(libmongoc GIT_REPOSITORY "https://github.com/mongodb/mongo-c-driver.git" GIT_TAG "1.12.0" GIT_PROGRESS 1 GIT_SHALLOW 1 SOURCE_DIR "${CMAKE_BINARY_DIR}/libmongoc" BINARY_DIR "${CMAKE_BINARY_DIR}/libmongoc-build" INSTALL_DIR "${CMAKE_BINARY_DIR}/libmongoc-install" CMAKE_CACHE_ARGS ${common_cmake_cache_args} -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_BINARY_DIR}/libmongoc-install -DENABLE_TESTS:BOOL=OFF -DENABLE_STATIC:BOOL=OFF -DENABLE_EXAMPLES:BOOL=OFF -DENABLE_EXTRA_ALIGNMENT:BOOL=OFF #INSTALL_COMMAND "" ) set(libmongoc-1.0_DIR "${CMAKE_BINARY_DIR}/libmongoc-install/lib/cmake/libmongoc-1.0/") set(libbson-1.0_DIR "${CMAKE_BINARY_DIR}/libmongoc-install/lib/cmake/libbson-1.0/") ExternalProject_Add(libmongocxx GIT_REPOSITORY "https://github.com/mongodb/mongo-cxx-driver.git" GIT_TAG "r3.3.1" GIT_PROGRESS 1 GIT_SHALLOW 1 SOURCE_DIR "${CMAKE_BINARY_DIR}/libmongocxx" BINARY_DIR "${CMAKE_BINARY_DIR}/libmongocxx-build" INSTALL_DIR "${CMAKE_BINARY_DIR}/libmongocxx-install" CMAKE_CACHE_ARGS ${common_cmake_cache_args} -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_BINARY_DIR}/libmongocxx-install -DBUILD_SHARED_LIBS:BOOL=ON -DENABLE_TESTS:BOOL=OFF -DENABLE_EXAMPLES:BOOL=OFF -DBSONCXX_POLY_USE_BOOST:BOOL=OFF -DBSONCXX_POLY_USE_MNMLSTC:BOOL=ON -DBSONCXX_POLY_USE_STD:BOOL=OFF -Dlibmongoc-1.0_DIR:PATH=${libmongoc-1.0_DIR} -Dlibbson-1.0_DIR:PATH=${libbson-1.0_DIR} DEPENDS libmongoc ) set(libmongocxx_DIR "${CMAKE_BINARY_DIR}/libmongocxx-install/lib/cmake/libmongocxx-3.3.1/") set(libbsoncxx_DIR "${CMAKE_BINARY_DIR}/libmongocxx-install//lib/cmake/libbsoncxx-3.3.1/") function(ExternalProject_AlwaysConfigure proj) # This custom external project step forces the configure and later # steps to run. _ep_get_step_stampfile(${proj} "configure" stampfile) ExternalProject_Add_Step(${proj} forceconfigure COMMAND ${CMAKE_COMMAND} -E remove ${stampfile} COMMENT "Forcing configure step for '${proj}'" DEPENDEES build ALWAYS 1 ) endfunction() ExternalProject_Add(${PROJECT_NAME} SOURCE_DIR "${CMAKE_SOURCE_DIR}" BINARY_DIR "${CMAKE_BINARY_DIR}/${PROJECT_NAME}-build" DOWNLOAD_COMMAND "" UPDATE_COMMAND "" CMAKE_CACHE_ARGS ${common_cmake_cache_args} -D${PROJECT_NAME}_SUPERBUILD:BOOL=OFF -Dlibbsoncxx_DIR:PATH=${libbsoncxx_DIR} -Dlibmongocxx_DIR:PATH=${libmongocxx_DIR} INSTALL_COMMAND "" DEPENDS libmongocxx ) ExternalProject_AlwaysConfigure(${PROJECT_NAME}) return() endif() message(STATUS "Configuring inner-build") find_package(libmongocxx REQUIRED) add_executable(test_mongocxx test.cpp) target_link_libraries(test_mongocxx PUBLIC ${LIBMONGOCXX_LIBRARIES}) target_include_directories(test_mongocxx PUBLIC ${LIBMONGOCXX_INCLUDE_DIRS}) target_compile_definitions(test_mongocxx PUBLIC ${LIBMONGOCXX_DEFINITIONS})
-
test.cpp (копирано от https://mongodb.github.io/mongo-cxx-driver/mongocxx-v3/installation/#step-6-test-your-installation):
#include <iostream> #include <bsoncxx/builder/stream/document.hpp> #include <bsoncxx/json.hpp> #include <mongocxx/client.hpp> #include <mongocxx/instance.hpp> int main(int, char**) { mongocxx::instance inst{}; mongocxx::client conn{mongocxx::uri{}}; bsoncxx::builder::stream::document document{}; auto collection = conn["testdb"]["testcollection"]; document << "hello" << "world"; collection.insert_one(document.view()); auto cursor = collection.find({}); for (auto&& doc : cursor) { std::cout << bsoncxx::to_json(doc) << std::endl; } }