如何使用 CMake 和 -L/usr/include/mariadb/mysql -lmariadbclient 编译 C++

Question

My C++ file includes the mariadb/mysql.h as following.

#include <mariadb/mysql.h>

I compile my C++ file as following.

g++ -std=c++2a -g main.cpp -o main -lmariadbclient

It works fine. But if I want to compile my C++ file using CMakeLists.txt. How to compile the C++ source code with -lmariadbclient using CMake?

Answer 1

It looks like major distros ship with a pkg-config file for mariadb called "mysqlclient.pc".

So you can do:

find_package(FindPkgConfig REQUIRED)
pkg_check_modules(mariadb REQUIRED IMPORTED_TARGET "mysqlclient")

and then link it to your program like so:

target_link_libraries(my_program PUBLIC PkgConfig::mariadb)

Answer 2

Add the following in the main CMakeLists.txt.

list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_SOURCE_DIR}/cmake-modules")

find_package(MariaDBClient REQUIRED)

target_link_libraries(
    your_project_name
    MariaDBClient::MariaDBClient
)

In the same directory as the main CMakeLists.txt , create the directory cmake-modules and create the file FindMariaDBClient.cmake in the cmake-modules directory.

Add the following in the FindMariaDBClient.cmake file.

find_path(MariaDBClient_INCLUDE_DIR NAMES mysql.h PATH_SUFFIXES mariadb mysql)

set(BAK_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_SHARED_LIBRARY_SUFFIX})
find_library(MariaDBClient_LIBRARY
    NAMES mariadb libmariadb mariadbclient libmariadbclient mysqlclient 
    libmysqlclient
    PATH_SUFFIXES mariadb mysql
)
set(CMAKE_FIND_LIBRARY_SUFFIXES ${BAK_CMAKE_FIND_LIBRARY_SUFFIXES})

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(MariaDBClient DEFAULT_MSG 
MariaDBClient_LIBRARY MariaDBClient_INCLUDE_DIR)

if(MariaDBClient_FOUND)
    if(NOT TARGET MariaDBClient::MariaDBClient)
        add_library(MariaDBClient::MariaDBClient UNKNOWN IMPORTED)
        set_target_properties(MariaDBClient::MariaDBClient PROPERTIES
            INTERFACE_INCLUDE_DIRECTORIES "${MariaDBClient_INCLUDE_DIR}"
            IMPORTED_LOCATION "${MariaDBClient_LIBRARY}")
    endif()
endif()

mark_as_advanced(MariaDBClient_INCLUDE_DIR MariaDBClient_LIBRARY)

set(MariaDBClient_LIBRARIES ${MariaDBClient_LIBRARY})
set(MariaDBClient_INCLUDE_DIRS ${MariaDBClient_INCLUDE_DIR})