The echo UDP server example does not compile against package installed by vcpkg.

[denismakogon]

CMakeLists.txt:

cmake_minimum_required (VERSION 3.24)

project (udplib LANGUAGES C CXX VERSION 0.0.1 DESCRIPTION "udplib")

set (CMAKE_CXX_STANDARD 20)

add_executable(${PROJECT_NAME} src/main.cc ${HEADERS})

find_package(unofficial-evpp CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE unofficial::evpp::evpp_static)

code:

#include <stdio.h>

#include <evpp/udp/udp_message.h>
#include <evpp/event_loop.h>
#include <evpp/event_loop_thread_pool.h>

int main(int argc, char* argv[]) {
    std::vector<int> ports = { 1053, 5353 };
    int port = 29099;
    int thread_num = 2;

    if (argc > 1) {
        if (std::string("-h") == argv[1] ||
            std::string("--h") == argv[1] ||
            std::string("-help") == argv[1] ||
            std::string("--help") == argv[1]) {
            std::cout << "usage : " << argv[0] << " <listen_port> <thread_num>\n";
            std::cout << " e.g. : " << argv[0] << " 8080 24\n";
            return 0;
        }
    }

    if (argc == 2) {
        port = atoi(argv[1]);
    }
    ports.push_back(port);

    if (argc == 3) {
        port = atoi(argv[1]);
        thread_num = atoi(argv[2]);
    }

    evpp::udp::Server server;
    server.SetThreadDispatchPolicy(evpp::ThreadDispatchPolicy::kIPAddressHashing);
    server.SetMessageHandler([](evpp::EventLoop* loop, evpp::udp::MessagePtr& msg) {
        std::stringstream oss;
        oss << "func=" << __FUNCTION__ << " OK"
            << " body=" << std::string(msg->data(), msg->size()) << "\n";
        evpp::udp::SendMessage(msg);
    });
    server.Init(ports);
    server.Start();

    evpp::EventLoop loop;
    std::shared_ptr<evpp::EventLoopThreadPool> tpool(new evpp::EventLoopThreadPool(&loop, thread_num));
    tpool->Start(true);
    server.SetEventLoopThreadPool(tpool);
    loop.Run();
    server.Stop(true);
    tpool->Stop(true);
    return 0;
}

errors:

[ 50%] Building CXX object CMakeFiles/udplib.dir/src/main.cc.o
/Users/denismakogon/go/src/github.com/denismakogon/udplib/src/main.cc:33:16: error: no type named 'Server' in namespace 'evpp::udp'
    evpp::udp::Server server;
    ~~~~~~~~~~~^
/Users/denismakogon/go/src/github.com/denismakogon/udplib/src/main.cc:34:42: error: no member named 'ThreadDispatchPolicy' in namespace 'evpp'
    server.SetThreadDispatchPolicy(evpp::ThreadDispatchPolicy::kIPAddressHashing);
                                   ~~~~~~^
2 errors generated.
make[2]: *** [CMakeFiles/udplib.dir/src/main.cc.o] Error 1
make[1]: *** [CMakeFiles/udplib.dir/all] Error 2
make: *** [all] Error 2

[jinguoli]

add #include <evpp/udp/udp_server.h> to the main.cc

[denismakogon]

@jinguoli Hey, thank you for the reply. It indeed helped to build a binary, but now I'm having another issue:

./udplib 8080 24
WARNING: Logging before InitGoogleLogging() is written to STDERR
I20221021 13:36:36.108130 5764915 inner_pre.cc:27] ignore SIGPIPE
E20221021 13:36:36.109118 5764915 sockets.cc:89] socket bind error=22 Invalid argument
E20221021 13:36:36.109143 5764915 udp_server.cc:41] listen error
Assertion failed: (ret), function Init, file udp_server.cc, line 111.

I'm on macOS 12.6[M1].

[denismakogon]

@jinguoli any updates?