cmake ZMQ_HAVE_TCP_KEEPALIVE examples

zeromq/zeromq4-x builds/cmake/Modules/ZMQSourceRunChecks.cmake :111

check_c_source_runs(
    "
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>

int main(int argc, char *argv [])
{
    int s, rc, opt = 1;
    return(
       ((s = socket(PF_INET, SOCK_STREAM, 0)) == -1) ||
       ((rc = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,(char*) &opt, sizeof(int))) == -1) ||
       ((rc = setsockopt(s, IPPROTO_TCP, TCP_KEEPALIVE,(char*) &opt, sizeof(int))) == -1)
    );
}
"
    ZMQ_HAVE_TCP_KEEPALIVE)

zeromq/libzmq builds/cmake/Modules/ZMQSourceRunChecks.cmake :162

check_c_source_runs(
    "
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>

int main(int argc, char *argv [])
{
    int s, rc, opt = 1;
    return(
       ((s = socket(PF_INET, SOCK_STREAM, 0)) == -1) ||
       ((rc = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,(char*) &opt, sizeof(int))) == -1) ||
       ((rc = setsockopt(s, IPPROTO_TCP, TCP_KEEPALIVE,(char*) &opt, sizeof(int))) == -1)
    );
}
"
    ZMQ_HAVE_TCP_KEEPALIVE)

zeromq/zeromq4-1 builds/cmake/Modules/ZMQSourceRunChecks.cmake :111

check_c_source_runs(
    "
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>

int main(int argc, char *argv [])
{
    int s, rc, opt = 1;
    return(
       ((s = socket(PF_INET, SOCK_STREAM, 0)) == -1) ||
       ((rc = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,(char*) &opt, sizeof(int))) == -1) ||
       ((rc = setsockopt(s, IPPROTO_TCP, TCP_KEEPALIVE,(char*) &opt, sizeof(int))) == -1)
    );
}
"
    ZMQ_HAVE_TCP_KEEPALIVE)

asset-group/5ghoul-5g-nr-attacks libs/libzmq/builds/cmake/Modules/ZMQSourceRunChecks.cmake :162

check_c_source_runs(
    "
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>

int main(int argc, char *argv [])
{
    int s, rc, opt = 1;
    return(
       ((s = socket(PF_INET, SOCK_STREAM, 0)) == -1) ||
       ((rc = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,(char*) &opt, sizeof(int))) == -1) ||
       ((rc = setsockopt(s, IPPROTO_TCP, TCP_KEEPALIVE,(char*) &opt, sizeof(int))) == -1)
    );
}
"
    ZMQ_HAVE_TCP_KEEPALIVE)