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我最近开始学习 CMake，并决定将它用于我正在从事的一个旧项目。该项目有 cpp-netlib、boost 和 Openssl 作为依赖项。这是我想出的工作 CMakeLists.txt 文件。

CMAKE_MINIMUM_REQUIRED(VERSION 3.4.1)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
PROJECT(MangaMe)
INCLUDE_DIRECTORIES(includes)
ADD_EXECUTABLE(mangaMe src/mangaMe.cpp)

set(Boost_USE_MULTITHREADED ON)
FIND_PACKAGE(Boost 1.59.0 REQUIRED COMPONENTS system thread filesystem)
INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
TARGET_LINK_LIBRARIES(mangaMe ${Boost_LIBRARIES})

SET(OPENSSL_LIB_DIR /usr/local/Cellar/openssl/1.0.2e/lib)
INCLUDE_DIRECTORIES(/usr/local/Cellar/openssl/1.0.2e/include)
TARGET_LINK_LIBRARIES(mangaMe ${OPENSSL_LIB_DIR}/libcrypto.dylib ${OPENSSL_LIB_DIR}/libssl.dylib)

#WHY DOESNT THIS WORK!?!??!!?
#FIND_PACKAGE(cppnetlib 0.11 REQUIRED COMPONENTS client-connections server-parsers uri)
#INCLUDE_DIRECTORIES(${cppnetlib_INCLUDE_DIRS})
#TARGET_LINK_LIBRARIES(mangaMe ${cppnetlib_LIBRARIES})

SET(CPPNETLIB_LIB_DIR /usr/local/Cellar/cpp-netlib/0.11.2/lib)
INCLUDE_DIRECTORIES(/usr/local/Cellar/cpp-netlib/0.11.2/include)
TARGET_LINK_LIBRARIES(mangaMe ${CPPNETLIB_LIB_DIR}/libcppnetlib-client-connections.a ${CPPNETLIB_LIB_DIR}/libcppnetlib-server-parsers.a ${CPPNETLIB_LIB_DIR}/libcppnetlib-uri.a)

我想知道是否有人知道为什么使用 FIND_PACKAGE 查找 cppnetlib 的注释掉部分不起作用？我使用自制软件来安装 cpp-netlib，当我运行 if(cppnetlib_FOUND) 时，我知道它找到了包，但似乎找不到库，所以当我尝试制作我的项目时，它错误地说它缺少来自 cpp- 的库网络库。我还注意到，当我在 FIND_PACKAGE 中将版本设置为 0.11.2（当前安装的版本）时，我收到一条消息说

-- Boost version: 1.59.0
-- Found the following Boost libraries:
--   system
--   thread
--   filesystem
CMake Error at CMakeLists.txt:16 (FIND_PACKAGE):
  Could not find a configuration file for package "cppnetlib" that is
  compatible with requested version "0.11.2".

  The following configuration files were considered but not accepted:

    /usr/local/lib/cmake/cppnetlib/cppnetlibConfig.cmake, version: 0.11.1
    /usr/local/lib/cmake/cppnetlib/cppnetlibConfig.cmake, version: 0.11.1



-- Configuring incomplete, errors occurred!
See also "/Users/LittleNewt/gitness/mangaMe/build/CMakeFiles/CMakeOutput.log".

没什么大不了的，因为它在我明确指定目录时起作用，但仍然想知道为什么我不能只使用 FIND_PACKAGE。

4

1 回答 1

5

尝试更改cppnetlib_INCLUDE_DIRS为CPPNETLIB_INCLUDE_DIRS和。cppnetlib_LIBRARIESCPPNETLIB_LIBRARIES

前缀不是包名，而是包的 CMake 文件中导出的内容。这是使用大写的源代码：https ://github.com/cpp-netlib/cpp-netlib/blob/master/cppnetlibConfig.cmake.in

于 2015-12-24T05:54:46.660 回答