cpp_redis是个C 11的开源的redis client库，支持cmake构建，但并没有提供CONFIG模式的import target导入脚本，如果希望在cmake下以find_package方式导入cpp_redis的库，就需要自己写一个MODULE模式脚本，以下为FindCppRedis.cmake脚本实现
FindCppRedis.cmake
代码语言：javascript复制# FindCppRedis
# --------
#
# Find cpp_redis
#
# Find the native cpp_redis includes and library This module defines
#
# input variable:
# CPPREDIS_MT_DIR, OPTIONAL,set path of cppredis libray built with /MT using MSVC
# CPPREDIS_MD_DIR, OPTIONAL,set path of cppredis libray built with /MD using MSVC
# CPPREDIS_MSVCRT, OPTIONAL,set '/MT' or '/MD' for define type of link msvc runtime library of current cppredis library,default '/MT'
# if CPPREDIS_MT_DIR or CPPREDIS_MD_DIR defined, ignore it.
# output variable:
#
# CPPREDIS_FOUND, If false, do not try to use cpp_redis.
# CPPREDIS_INCLUDE_DIR, where to find header cpp_redis, etc.
# CPPREDIS_LIBRARY, where to find the cpp_redis library.
# TACOPIE_LIBRARY, where to find the tacopie library.
# for msvc :
# CPPREDIS_LIBRARY_DEBUG, where to find the cpp_redis library (Debug FOR MSVC).
# CPPREDIS_LIBRARY_RELEASE, where to find the cpp_redis library (Release FOR MSVC).
# TACOPIE_LIBRARY_DEBUG, where to find the tacopie library.(Debug FOR MSVC).
# TACOPIE_LIBRARY_RELEASE, where to find the tacopie library (Release FOR MSVC).
# import target:
# cppredis
# cppredis_mt (FOR MSVC)
function(msvc_create_target _msvcrt_suffix _path)
unset(CPPREDIS_INCLUDE_DIR CACHE)
unset(CPPREDIS_LIBRARY_DEBUG CACHE)
unset(CPPREDIS_LIBRARY_RELEASE CACHE)
unset(TACOPIE_LIBRARY_DEBUG CACHE)
unset(TACOPIE_LIBRARY_RELEASE CACHE)
if(_path)
if(NOT EXISTS ${_path})
message(WARNING "invalid cppredis library path ${_path}")
return()
endif()
# find header file
find_path(CPPREDIS_INCLUDE_DIR cpp_redis/cpp_redis PATHS "${_path}/include" NO_DEFAULT_PATH)
find_library(CPPREDIS_LIBRARY_DEBUG NAMES cpp_redis cpp_redis${_msvcrt_suffix}_d PATHS "${_path}/lib" "${_path}/lib/Debug" NO_DEFAULT_PATH )
find_library(CPPREDIS_LIBRARY_RELEASE NAMES cpp_redis cpp_redis${_msvcrt_suffix} PATHS "${_path}/lib" "${_path}/lib/Release" NO_DEFAULT_PATH )
find_library(TACOPIE_LIBRARY_DEBUG NAMES tacopie tacopie${_msvcrt_suffix}_d PATHS "${_path}/lib" "${_path}/lib/Debug" NO_DEFAULT_PATH )
find_library(TACOPIE_LIBRARY_RELEASE NAMES tacopie tacopie${_msvcrt_suffix} PATHS "${_path}/lib" "${_path}/lib/Release" NO_DEFAULT_PATH )
else()
# find header file
find_path(CPPREDIS_INCLUDE_DIR cpp_redis/cpp_redis)
find_library(CPPREDIS_LIBRARY_DEBUG NAMES cpp_redis cpp_redis${_msvcrt_suffix}_d PATH_SUFFIXES Debug )
find_library(CPPREDIS_LIBRARY_RELEASE NAMES cpp_redis cpp_redis${_msvcrt_suffix} PATH_SUFFIXES Release )
find_library(TACOPIE_LIBRARY_DEBUG NAMES tacopie tacopie${_msvcrt_suffix}_d PATH_SUFFIXES Debug )
find_library(TACOPIE_LIBRARY_RELEASE NAMES tacopie tacopie${_msvcrt_suffix} PATH_SUFFIXES Release )
endif()
FIND_PACKAGE_HANDLE_STANDARD_ARGS(CPPREDIS DEFAULT_MSG
CPPREDIS_INCLUDE_DIR
CPPREDIS_LIBRARY_RELEASE
CPPREDIS_LIBRARY_DEBUG
TACOPIE_LIBRARY_RELEASE
TACOPIE_LIBRARY_DEBUG)
if(${_msvcrt_suffix} STREQUAL "_mt")
set(_target_name "cppredis_mt")
set(_cppredis_msvcrt "/MT")
else()
set(_target_name "cppredis")
set(_cppredis_msvcrt "/MD")
endif()
if(CPPREDIS_FOUND)
message(STATUS "IMPORTED TARGET ${_target_name}")
# for compatility of find_dependency
set(CppRedis_FOUND TRUE PARENT_SCOPE)
set(CPPREDIS_FOUND TRUE PARENT_SCOPE)
add_library(${_target_name} STATIC IMPORTED)
set_target_properties(${_target_name} PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES CXX
INTERFACE_INCLUDE_DIRECTORIES ${CPPREDIS_INCLUDE_DIR}
)
set_target_properties(${_target_name} PROPERTIES
IMPORTED_LINK_INTERFACE_LIBRARIES_DEBUG ${TACOPIE_LIBRARY_DEBUG}
IMPORTED_LINK_INTERFACE_LIBRARIES_RELEASE ${TACOPIE_LIBRARY_RELEASE}
IMPORTED_LOCATION_DEBUG ${CPPREDIS_LIBRARY_DEBUG}
IMPORTED_LOCATION_RELEASE ${CPPREDIS_LIBRARY_RELEASE}
# set /MT or /MT option
INTERFACE_COMPILE_OPTIONS "${_cppredis_msvcrt}$<$<CONFIG:Debug>:d>"
)
set(_msvcrt_flags "${_msvcrt_flags}${_cppredis_msvcrt}" PARENT_SCOPE)
endif(CPPREDIS_FOUND)
endfunction(msvc_create_target )
# handle the QUIETLY and REQUIRED arguments and set CPPREDIS_FOUND to TRUE if
# all listed variables are TRUE
include(FindPackageHandleStandardArgs)
if(MSVC)
unset(_msvcrt_flags)
if(CPPREDIS_MT_DIR)
unset(CPPREDIS_FOUND)
unset(CppRedis_FOUND)
msvc_create_target( "_mt" "${CPPREDIS_MT_DIR}")
endif()
if(CPPREDIS_MD_DIR)
unset(CPPREDIS_FOUND)
unset(CppRedis_FOUND)
msvc_create_target( "_md" "${CPPREDIS_MD_DIR}")
endif()
if(NOT CPPREDIS_FOUND)
if ("${CPPREDIS_MSVCRT}" STREQUAL "")
set(CPPREDIS_MSVCRT "/MT" PARENT_SCOPE)
endif ()
if(${CPPREDIS_MSVCRT} MATCHES "/MT")
msvc_create_target( "_mt" "")
elseif(${CPPREDIS_MSVCRT} MATCHES "/MD")
msvc_create_target( "_md" "")
endif()
set(CPPREDIS_LIBRARY ${CPPREDIS_LIBRARY_RELEASE})
set(TACOPIE_LIBRARY ${TACOPIE_LIBRARY_RELEASE} )
else()
set(CPPREDIS_MSVCRT ${_msvcrt_flags})
endif(NOT CPPREDIS_FOUND)
mark_as_advanced(CPPREDIS_LIBRARY_DEBUG CPPREDIS_LIBRARY_RELEASE TACOPIE_LIBRARY_DEBUG TACOPIE_LIBRARY_RELEASE CPPREDIS_INCLUDE_DIR )
else()
# find header file
find_path(CPPREDIS_INCLUDE_DIR cpp_redis/cpp_redis)
find_library(CPPREDIS_LIBRARY cpp_redis )
find_library(TACOPIE_LIBRARY tacopie )
FIND_PACKAGE_HANDLE_STANDARD_ARGS(CPPREDIS DEFAULT_MSG CPPREDIS_LIBRARY TACOPIE_LIBRARY CPPREDIS_INCLUDE_DIR)
if(CPPREDIS_FOUND)
# for compatility of find_dependency
set (CppRedis_FOUND TRUE)
add_library(cppredis STATIC IMPORTED)
set_target_properties(cppredis PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES CXX
INTERFACE_INCLUDE_DIRECTORIES ${CPPREDIS_INCLUDE_DIR}
)
set_target_properties(cppredis PROPERTIES
IMPORTED_LINK_INTERFACE_LIBRARIES "${TACOPIE_LIBRARY};ws2_32"
IMPORTED_LOCATION "${CPPREDIS_LIBRARY}"
)
mark_as_advanced(CPPREDIS_LIBRARY TACOPIE_LIBRARY CPPREDIS_INCLUDE_DIR )
endif()
endif(MSVC)FindCppRedis.cmake 执行时可接收以下输入变量
- CPPREDIS_MT_DIR, [可选],指定MSVC以/MT选项编译的库的安装位置
- CPPREDIS_MD_DIR, [可选],指定MSVC以/M选项编译的库的安装位置
- CPPREDIS_MSVCRT, [可选],指定当前cppredis库的 MSVC运行库的类型 ‘/MT’ 或 ‘/MD’,默认’/MT’ 如果定义了 CPPREDIS_MT_DIR 或 CPPREDIS_MD_DIR defined, 则忽略此参数
FindCppRedis.cmake 执行后输出的变量
- CPPREDIS_FOUND, 找到 cpp_redis 库为true,否则为false
- CPPREDIS_INCLUDE_DIR, cpp_redis 头文件所在目录 CPPREDIS_LIBRARY, cpp_redis 库文件位置 TACOPIE_LIBRARY, cpp_redis 的依库 tacopie的位置 MSVC 下的输出变量 :
- CPPREDIS_LIBRARY_DEBUG, cppredis Debug版本库位置
- CPPREDIS_LIBRARY_RELEASE, cppredis Release版本库位置
- TACOPIE_LIBRARY_DEBUG, tacopie Debug版本库位置
- TACOPIE_LIBRARY_RELEASE, tacopie Release版本库位置
FindCppRedis.cmake会创建cppredis import target,如果是MSVC编译器，还可能会创建cppredis_mt
调用示例
代码语言：javascript复制# include FindCppRedis.cmake module
# 将 FindCppRedis.cmake 所在的文件夹添加到CMAKE_MODULE_PATH
# 否则find_package(CppRedis)时找不到FindCppRedis.cmake
list (APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/Modules")
find_package(CppRedis)
target_link_libraries(${your_target} cppredis) 
