正确的 CMakeLists 文件
Proper CMakeLists file
我正在尝试使用 CLion 和 CMakeFiles 为 PostgreSQL 构建一个带有 LIBPQXX Github 的项目。这是我针对这个问题的简单代码，pqxx::connection con(); 函数中的参数被故意更改为 post.
#include <iostream>
#include <pqxx/pqxx>
#include "project_config.h"
int main()
{
pqxx::connection conn("dbname = dbname user = user password = password hostaddr = hostaddr port = port");
std::cout << "Opened database successfully: " << std::endl;
return 0;
}
当我执行Shell中的命令时
g++ -std=c++11 -I /usr/local/include/pqxx/ -L /usr/local/lib/ -I /usr/pgsql-10/include/ -L /usr/pgsql-10/lib/ main.cpp -lpqxx -lpq -o run
之后 ./run，一切正常。
现在，当我使用那些 CMakeFiles 设置获得与 运行 CLion[= 中的项目相同的结果时33=]
cmake_minimum_required(VERSION 3.10)
project(project)
# Set flags
set(COMPILE_FLAGS "-std=c++11")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${COMPILE_FLAGS}")
# The version number.
set (project_VERSION_MAJOR 1)
set (project_VERSION_MINOR 0)
# Use a header file for some CMake settings in the source code
configure_file (
"${PROJECT_SOURCE_DIR}/project_config.h.in"
"${PROJECT_BINARY_DIR}/project_config.h"
)
# Set new own names
set(APP_DOMAIN ${PROJECT_SOURCE_DIR}/dev/hmmenc_client)
set(PQXX /usr/local/include/pqxx)
set(PGSQL_10 /usr/pgsql-10/include)
# Find the pqxx and pq libraries
find_library(PQXX_LIB pqxx "${PQXX}")
find_library(PQ_LIB pq "${PGSQL_10}")
include_directories(${PROJECT_BINARY_DIR})
# Other project path includes
include_directories(${APP_DOMAIN})
include_directories(${PQXX})
include_directories(${PGSQL_10})
find_package(FindPQXX)
set(SOURCE_FILES
# ${APP_DOMAIN}/db/db.h
# ${APP_DOMAIN}/db/db.cpp
${APP_DOMAIN}/main.cpp
)
add_executable(project ${SOURCE_FILES})
target_link_libraries(${TARGET_NAME} pqxx)
#link_directories(project ${PQXX})
但是当我尝试 运行 时，我得到：
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::connection_base::connection_base(pqxx::connectionpolicy&)':
/usr/local/include/pqxx/connection_base.hxx:695: undefined reference to `int pqxx::internal::check_library_version<6, 2>()'
/usr/local/include/pqxx/connection_base.hxx:698: undefined reference to `pqxx::connection_base::clearcaps()'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::connect_direct::connect_direct(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
/usr/local/include/pqxx/connection.hxx:83: undefined reference to `pqxx::connectionpolicy::connectionpolicy(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/local/include/pqxx/connection.hxx:83: undefined reference to `vtable for pqxx::connect_direct'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::connect_direct::~connect_direct()':
/usr/local/include/pqxx/connection.hxx:78: undefined reference to `vtable for pqxx::connect_direct'
/usr/local/include/pqxx/connection.hxx:78: undefined reference to `pqxx::connectionpolicy::~connectionpolicy()'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::basic_connection<pqxx::connect_direct>::~basic_connection()':
/usr/local/include/pqxx/basic_connection.hxx:66: undefined reference to `pqxx::connection_base::close()'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::basic_connection<pqxx::connect_direct>::basic_connection(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
/usr/local/include/pqxx/basic_connection.hxx:57: undefined reference to `pqxx::connection_base::init()'
collect2: error: ld returned 1 exit status
gmake[3]: *** [CMakeFiles/project.dir/build.make:95: project] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:68: CMakeFiles/project.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:80: CMakeFiles/project.dir/rule] Error 2
gmake: *** [Makefile:118: project] Error 2
有人可以帮助我进行 CMakeLists 配置以获得与在 Shell[=72= 中执行上述命令相同的结果吗]?
更新
我尝试按照下面评论中的建议使用 FindPQXX.cmake，但我仍然遇到错误
CMake Warning at CMakeLists.txt:76 (find_package):
By not providing "FindFindPQXX.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "FindPQXX",
but CMake did not find one.
Could not find a package configuration file provided by "FindPQXX" with any
of the following names:
FindPQXXConfig.cmake
findpqxx-config.cmake
Add the installation prefix of "FindPQXX" to CMAKE_PREFIX_PATH or set
"FindPQXX_DIR" to a directory containing one of the above files. If
"FindPQXX" provides a separate development package or SDK, be sure it has
been installed.
为了让事情更清楚一点。假设我的项目树如下所示：
project # Root folder
project/cmake-build-debug # Some cmake code
project/dev
project/dev/hmmenc_client/ # I write my program with all the subfolders and their classes here
project/dev/SEAL_API/ # Some other code to use later
我的 CMakeLists.txt 和 FindPQXX.cmake 文件在我的 project 根文件夹中。我要编译的main.cpp在project/dev/hmmenc_client/
我添加了
find_package(FindPQXX)
target_link_libraries(${TARGET_NAME} pqxx)
给我的 CMakeFiles.txt。我在这里错过了什么， ${TARGET_NAME} 代表什么？我必须编辑 FindPQXX.cmake 文件以包含 /usr/pgsql-10/include/ 和 /usr/pgsql-10/lib/，因为这是我的 postgres 开发要求。真正的 PostgreSQL 数据库在其他机器上。
我使用标准设置从上面提到的 Github 安装 libpqxx，所以相关文件夹是 /usr/local/include/pqxx/ 和 /usr/local/lib/
我是 Cmake 世界的新手所以不要带走任何信息:)
要在 CMake 中使用库 "foo"，惯用的方法是 find/use/write 一个 .cmake 文件，使用 CMake 语法和命令，确定 foo 安装在您的 OS 上并为 target_link_libraries 设置适当的变量以供查找。
我在 github 上找到了一个 libpqxx 的分支，它恰好包含 FindPQXX.cmake。为了使用它，请在您的主要 CMakeLists.txt 中包含以下内容：
find_package(PQXX)
target_link_libraries(${TARGET_NAME} pqxx)
这是我对 CMakeLists.txt 的工作配置，它在 FindPQXX.cmake 文件不工作后执行 g++ -std=c++11 -I /usr/local/include/pqxx/ -L /usr/local/lib/ -I /usr/pgsql-10/include/ -L /usr/pgsql-10/lib/ main.cpp -lpqxx -lpq。
cmake_minimum_required(VERSION 3.10)
project(project)
# Set flags
set(GCC_COVERAGE_COMPILE_FLAGS "-std=gnu++11")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_COVERAGE_COMPILE_FLAGS}")
# The version number.
set(project_VERSION_MAJOR 1)
set(project_VERSION_MINOR 0)
# Use a header file for some CMake settings in the source code
configure_file (
"${PROJECT_SOURCE_DIR}/project_config.h.in"
"${PROJECT_BINARY_DIR}/project_config.h"
)
# Set some path variables
set(APP_DOMAIN ${PROJECT_SOURCE_DIR}/dev/hmmenc_client)
set(PQXX /usr/local/include/pqxx)
set(PGSQL_10 /usr/pgsql-10/include)
# Find the needed libraries for liniking with -lpqxx and -lpq flags
find_library(PQXX_LIB pqxx)
#message("PQXX_LIB is ${PQXX_LIB}")
find_library(PQ_LIB pq)
#message("PQ_LIB is ${PQ_LIB}")
# Project path includes
include_directories(${PROJECT_BINARY_DIR}
${APP_DOMAIN}
${PQXX}
${PGSQL_10}
)
#message("PQXX is ${PQXX}")
#message("PGSQL_10 is ${PGSQL_10}")
# Set source files
set(SOURCE_FILES
${APP_DOMAIN}/db/db.h
${APP_DOMAIN}/db/db.cpp
${APP_DOMAIN}/main.cpp
)
add_executable(project ${SOURCE_FILES})
# Link the liraries of pqxx and pq to the executable
target_link_libraries(project ${PQXX_LIB} ${PQ_LIB})
我不明白的一件事是我的 find_library(PQ_LIB pq) 在 /user/lib64 中找到 pq 并且我无法将其更改为在 /usr/pgsql-10/lib 中查找，它也有我更愿意使用的文件。
我正在尝试使用 CLion 和 CMakeFiles 为 PostgreSQL 构建一个带有 LIBPQXX Github 的项目。这是我针对这个问题的简单代码，pqxx::connection con(); 函数中的参数被故意更改为 post.
#include <iostream>
#include <pqxx/pqxx>
#include "project_config.h"
int main()
{
pqxx::connection conn("dbname = dbname user = user password = password hostaddr = hostaddr port = port");
std::cout << "Opened database successfully: " << std::endl;
return 0;
}
当我执行Shell中的命令时
g++ -std=c++11 -I /usr/local/include/pqxx/ -L /usr/local/lib/ -I /usr/pgsql-10/include/ -L /usr/pgsql-10/lib/ main.cpp -lpqxx -lpq -o run
之后 ./run，一切正常。
现在，当我使用那些 CMakeFiles 设置获得与 运行 CLion[= 中的项目相同的结果时33=]
cmake_minimum_required(VERSION 3.10)
project(project)
# Set flags
set(COMPILE_FLAGS "-std=c++11")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${COMPILE_FLAGS}")
# The version number.
set (project_VERSION_MAJOR 1)
set (project_VERSION_MINOR 0)
# Use a header file for some CMake settings in the source code
configure_file (
"${PROJECT_SOURCE_DIR}/project_config.h.in"
"${PROJECT_BINARY_DIR}/project_config.h"
)
# Set new own names
set(APP_DOMAIN ${PROJECT_SOURCE_DIR}/dev/hmmenc_client)
set(PQXX /usr/local/include/pqxx)
set(PGSQL_10 /usr/pgsql-10/include)
# Find the pqxx and pq libraries
find_library(PQXX_LIB pqxx "${PQXX}")
find_library(PQ_LIB pq "${PGSQL_10}")
include_directories(${PROJECT_BINARY_DIR})
# Other project path includes
include_directories(${APP_DOMAIN})
include_directories(${PQXX})
include_directories(${PGSQL_10})
find_package(FindPQXX)
set(SOURCE_FILES
# ${APP_DOMAIN}/db/db.h
# ${APP_DOMAIN}/db/db.cpp
${APP_DOMAIN}/main.cpp
)
add_executable(project ${SOURCE_FILES})
target_link_libraries(${TARGET_NAME} pqxx)
#link_directories(project ${PQXX})
但是当我尝试 运行 时，我得到：
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::connection_base::connection_base(pqxx::connectionpolicy&)':
/usr/local/include/pqxx/connection_base.hxx:695: undefined reference to `int pqxx::internal::check_library_version<6, 2>()'
/usr/local/include/pqxx/connection_base.hxx:698: undefined reference to `pqxx::connection_base::clearcaps()'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::connect_direct::connect_direct(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
/usr/local/include/pqxx/connection.hxx:83: undefined reference to `pqxx::connectionpolicy::connectionpolicy(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/usr/local/include/pqxx/connection.hxx:83: undefined reference to `vtable for pqxx::connect_direct'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::connect_direct::~connect_direct()':
/usr/local/include/pqxx/connection.hxx:78: undefined reference to `vtable for pqxx::connect_direct'
/usr/local/include/pqxx/connection.hxx:78: undefined reference to `pqxx::connectionpolicy::~connectionpolicy()'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::basic_connection<pqxx::connect_direct>::~basic_connection()':
/usr/local/include/pqxx/basic_connection.hxx:66: undefined reference to `pqxx::connection_base::close()'
CMakeFiles/project.dir/dev/hmmenc_client/main.cpp.o: In function `pqxx::basic_connection<pqxx::connect_direct>::basic_connection(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
/usr/local/include/pqxx/basic_connection.hxx:57: undefined reference to `pqxx::connection_base::init()'
collect2: error: ld returned 1 exit status
gmake[3]: *** [CMakeFiles/project.dir/build.make:95: project] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:68: CMakeFiles/project.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:80: CMakeFiles/project.dir/rule] Error 2
gmake: *** [Makefile:118: project] Error 2
有人可以帮助我进行 CMakeLists 配置以获得与在 Shell[=72= 中执行上述命令相同的结果吗]?
更新
我尝试按照下面评论中的建议使用 FindPQXX.cmake，但我仍然遇到错误
CMake Warning at CMakeLists.txt:76 (find_package):
By not providing "FindFindPQXX.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "FindPQXX",
but CMake did not find one.
Could not find a package configuration file provided by "FindPQXX" with any
of the following names:
FindPQXXConfig.cmake
findpqxx-config.cmake
Add the installation prefix of "FindPQXX" to CMAKE_PREFIX_PATH or set
"FindPQXX_DIR" to a directory containing one of the above files. If
"FindPQXX" provides a separate development package or SDK, be sure it has
been installed.
为了让事情更清楚一点。假设我的项目树如下所示：
project # Root folder
project/cmake-build-debug # Some cmake code
project/dev
project/dev/hmmenc_client/ # I write my program with all the subfolders and their classes here
project/dev/SEAL_API/ # Some other code to use later
我的 CMakeLists.txt 和 FindPQXX.cmake 文件在我的 project 根文件夹中。我要编译的main.cpp在project/dev/hmmenc_client/
我添加了
find_package(FindPQXX)
target_link_libraries(${TARGET_NAME} pqxx)
给我的 CMakeFiles.txt。我在这里错过了什么， ${TARGET_NAME} 代表什么？我必须编辑 FindPQXX.cmake 文件以包含 /usr/pgsql-10/include/ 和 /usr/pgsql-10/lib/，因为这是我的 postgres 开发要求。真正的 PostgreSQL 数据库在其他机器上。
我使用标准设置从上面提到的 Github 安装 libpqxx，所以相关文件夹是 /usr/local/include/pqxx/ 和 /usr/local/lib/
我是 Cmake 世界的新手所以不要带走任何信息:)
要在 CMake 中使用库 "foo"，惯用的方法是 find/use/write 一个 .cmake 文件，使用 CMake 语法和命令，确定 foo 安装在您的 OS 上并为 target_link_libraries 设置适当的变量以供查找。
我在 github 上找到了一个 libpqxx 的分支，它恰好包含 FindPQXX.cmake。为了使用它，请在您的主要 CMakeLists.txt 中包含以下内容：
find_package(PQXX)
target_link_libraries(${TARGET_NAME} pqxx)
这是我对 CMakeLists.txt 的工作配置，它在 FindPQXX.cmake 文件不工作后执行 g++ -std=c++11 -I /usr/local/include/pqxx/ -L /usr/local/lib/ -I /usr/pgsql-10/include/ -L /usr/pgsql-10/lib/ main.cpp -lpqxx -lpq。
cmake_minimum_required(VERSION 3.10)
project(project)
# Set flags
set(GCC_COVERAGE_COMPILE_FLAGS "-std=gnu++11")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_COVERAGE_COMPILE_FLAGS}")
# The version number.
set(project_VERSION_MAJOR 1)
set(project_VERSION_MINOR 0)
# Use a header file for some CMake settings in the source code
configure_file (
"${PROJECT_SOURCE_DIR}/project_config.h.in"
"${PROJECT_BINARY_DIR}/project_config.h"
)
# Set some path variables
set(APP_DOMAIN ${PROJECT_SOURCE_DIR}/dev/hmmenc_client)
set(PQXX /usr/local/include/pqxx)
set(PGSQL_10 /usr/pgsql-10/include)
# Find the needed libraries for liniking with -lpqxx and -lpq flags
find_library(PQXX_LIB pqxx)
#message("PQXX_LIB is ${PQXX_LIB}")
find_library(PQ_LIB pq)
#message("PQ_LIB is ${PQ_LIB}")
# Project path includes
include_directories(${PROJECT_BINARY_DIR}
${APP_DOMAIN}
${PQXX}
${PGSQL_10}
)
#message("PQXX is ${PQXX}")
#message("PGSQL_10 is ${PGSQL_10}")
# Set source files
set(SOURCE_FILES
${APP_DOMAIN}/db/db.h
${APP_DOMAIN}/db/db.cpp
${APP_DOMAIN}/main.cpp
)
add_executable(project ${SOURCE_FILES})
# Link the liraries of pqxx and pq to the executable
target_link_libraries(project ${PQXX_LIB} ${PQ_LIB})
我不明白的一件事是我的 find_library(PQ_LIB pq) 在 /user/lib64 中找到 pq 并且我无法将其更改为在 /usr/pgsql-10/lib 中查找，它也有我更愿意使用的文件。