添加RxCpp库到cmake项目

add RxCpp library to cmake project

本文关键字：项目 cmake 库到 RxCpp 添加      更新时间：2023-10-16

我想在Linux (gcc)上使用RxCpp，但我很难将RxCpp库适当地添加到我的cmake项目中。我按照克隆和构建指令运行:

git clone --recursive https://github.com/Reactive-Extensions/RxCpp.git
cd RxCpp
mkdir projects/build
cd projects/build
cmake -G"Unix Makefiles" -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_BUILD_TYPE=RelWithDebInfo -B. ../CMake
make

我试图运行make install，但得到:

make: *** No rule to make target 'install'.  Stop.

然后，我注意到文件libRxCpp.so在我的构建目录和复制它:

cp libRxCpp.so /sw/RxCpp/2.3.0/

我在Clion中创建了一个新项目，它使用cmake并像这样修改CMakeLists.txt:

cmake_minimum_required(VERSION 3.6)
project(RxCpp_Example)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
# my try to add library RxCpp
set(RxCpp_Lib_PATH /sw/RxCpp/2.3.0/)    
find_library(RxCpp_Lib NAMES libRxCpp.so PATHS ${RxCpp_Lib_PATH})
target_link_libraries(RxCpp_Example ${RxCpp_Lib})
set(SOURCE_FILES main.cpp)
add_executable(RxCpp_Example ${SOURCE_FILES})

然而，当更新cmake项目(或在终端运行cmake)时，我得到一个错误:

CMake Error at CMakeLists.txt:9 (target_link_libraries):
  Cannot specify link libraries for target "RxCpp_Example" which is not built
  by this project.

我做错了什么?我如何将RxCpp库添加到我的cmake项目?

在使用add_executable创建目标之前调用了target_link_libraries。像这样修改你的cmake文件:

find_library(RxCpp_Lib NAMES libRxCpp.so PATHS ${RxCpp_Lib_PATH})
set(SOURCE_FILES main.cpp)
add_executable(RxCpp_Example ${SOURCE_FILES})
target_link_libraries(RxCpp_Example ${RxCpp_Lib})
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