Problems with dependencies (Boost) in cmake + vcpkg on Windows

[sairus7]

I'm trying to run this code from this example on Windows with vscode + cmake + vcpkg:

ws-client.cpp

```cxx #include #include #include #include typedef websocketpp::client client; int main() { bool done = false; std::string input; while (!done) { std::cout << "Enter Command: "; std::getline(std::cin, input); if (input == "quit") { done = true; } else if (input == "help") { std::cout << "\nCommand List:\n" << "help: Display this help text\n" << "quit: Exit the program\n" << std::endl; } else { std::cout << "Unrecognized Command" << std::endl; } } return 0; } ```

CMakeLists.txt

``` cmake_minimum_required(VERSION 3.0.0) project(wspp VERSION 0.1.0) set(CMAKE_CXX_STANDARD 17) set(CMAKE_CXX_STANDARD_REQUIRED ON) set(CMAKE_CXX_EXTENSIONS OFF) add_executable(ws-client ws-client.cpp) find_package(websocketpp CONFIG REQUIRED) target_link_libraries(ws-client PRIVATE websocketpp::websocketpp ) ```

vcpkg.json

```json { "name": "wspp", "version": "1.0.1", "dependencies": [ "websocketpp" ] } ```

With mingw (GCC 11.2.0 x86_64-64-mingw32) compiler I have the following error:

[build] In file included from I:/code/test_websocketpp/build/vcpkg_installed/x64-windows/include/websocketpp/concurrency/basic.hpp:31,
[build]                  from I:/code/test_websocketpp/build/vcpkg_installed/x64-windows/include/websocketpp/config/core_client.hpp:38,
[build]                  from I:/code/test_websocketpp/build/vcpkg_installed/x64-windows/include/websocketpp/config/asio_no_tls_client.hpp:31,
[build]                  from I:/code/test_websocketpp/ws-client.cpp:1:
[build] I:/code/test_websocketpp/build/vcpkg_installed/x64-windows/include/websocketpp/common/thread.hpp:63:14: fatal error: boost/thread.hpp: No such file or directory
[build]    63 |     #include <boost/thread.hpp>
[build]       |              ^~~~~~~~~~~~~~~~~~

With MSVC I have the following error:

[build] I:\code\test_websocketpp\build\vcpkg_installed\x86-windows\include\websocketpp/common/random.hpp(59,18): fatal error C1083: Cannot open include file: 'boost/random/uniform_int_distribution.hpp': No such file or directory [I:\code\test_websocketpp\build\ws-client.vcxproj]

Both seems to be lacking some boost files. So I've added entire boost to my vcpkg.json and wait for it to install and now my build folder is of 1GB size...

Thois solved problem with MSVC, but next mingw error was undefined reference to '__imp_WSAStartup', so I linked ws2_32 library.

Final version worked for me with both compilers:

CMakeLists.txt

``` cmake_minimum_required(VERSION 3.0.0) project(wspp VERSION 0.1.0) set(CMAKE_CXX_STANDARD 17) set(CMAKE_CXX_STANDARD_REQUIRED ON) set(CMAKE_CXX_EXTENSIONS OFF) add_executable(ws-client ws-client.cpp) find_package(websocketpp CONFIG REQUIRED) target_link_libraries(ws-client PRIVATE websocketpp::websocketpp ) target_link_libraries(ws-client PRIVATE ws2_32) ```

vcpkg.json

```json { "name": "wspp", "version": "1.0.1", "dependencies": [ "websocketpp", "boost" ] } ```

Is there a simpler way to compile the same example?

[wilricknl]

You can add the following line above your websockets includes:

#define _WEBSOCKETPP_CPP11_RANDOM_DEVICE_

I am not sure if there's some define to use C++11 definitions by default. I suspect there is, but this was the quick fix for now.