I'm trying to include asio boost using CMakein my project but I'm getting this error. libraries linking is working in VS but I don't know how to link them in Cmake project.

Working Solution with VS:-

asio boost version: 1.24.0

VS ScreenShot

cmake_minimum_required(VERSION 3.10)
project(networking_examples)

#set(CMAKE_CXX_COMPILER D:/System/msys2/mingw64/bin/clang  )
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# Link Boost Asio library
target_include_directories(networking_examples PRIVATE "./asio-1.24.0/include")

add_executable(
  networking_examples
  ./src/index.cpp
)

CMake Project

I want to link ./asio-1.24.0/include with my project using CMAKE.

Error:

CMake Error at CMakeLists.txt:9 (target_include_directories):
  Cannot specify include directories for target "networking_examples" which
  is not built by this project.


-- Configuring incomplete, errors occurred!
See also "D:/Git Repo/c  /networking/cmake-build-debug/CMakeFiles/CMakeOutput.log".

CodePudding user response：

When you use target_include_directories there is not target named networking_examples. You add that target after.

Order matters, and just like in C symbols must be defined before they can be used.

So you need to change to:

add_executable(
  networking_examples
  ./src/index.cpp
)

# Asio library header directory
target_include_directories(networking_examples PRIVATE "./asio-1.24.0/include")

On another couple of notes: First you don't seem to be using Boost ASIO but rather the standalone header-only library.

Secondly, you don't link with the library (it's a header-only library). You only tell the build-system where it can find the ASIO header files.