exit(3）在Linux C++中挂起

我有一个小型C++程序，它可以ping网络上的其他机器，并通过另一个网络发送状态信息。该程序作为守护进程运行，因此启动进程派生出一个子进程，然后调用exit。该程序经过交叉编译，可在两种不同的体系结构上运行：x86和ARM。GCC版本分别为4.4和3.5。我可以在x86上编译和运行该程序，它运行得非常完美。但是，当我在ARM上运行程序时，每当我调用exit时，它都会挂起，而不仅仅是在fork之后。我没有在atexit或on_exit注册的功能。以下是我的产品：

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <sstream>
#include <string>
#include <set>
#include <vector>
#include <boost/bind.hpp>
#include <boost/asio.hpp>
#include <boost/thread.hpp>
#include "telnet_client.h"
#include <stdint.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <netdb.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <syslog.h>
#include <customlib1.h>
#include <customlib2.h>

以下是我的GCC命令：

arm-none-linux-gnueabi-g++ -Wall -DBUILDSTAMP=""`date '+%F %T'`"" -g -ggdb -O0 -I/usr/local/arm/arm-2007q1/arm-none-linux-gnueabi/libc/usr/include -DEMBEST_ARM -I/usr/local/share/arm/boost/src -I../include/ -I../include_rms -c can_wifid.cpp -o can_wifid.o
arm-none-linux-gnueabi-g++ -Wall -DBUILDSTAMP=""`date '+%F %T'`"" -g -ggdb -O0 -I/usr/local/arm/arm-2007q1/arm-none-linux-gnueabi/libc/usr/include -DEMBEST_ARM -I/usr/local/share/arm/boost/src -I../include/ -I../include_rms -c telnet_client.cpp -o telnet_client.o
arm-none-linux-gnueabi-g++ -Wall -DBUILDSTAMP=""`date '+%F %T'`"" -g -ggdb -O0 -I/usr/local/arm/arm-2007q1/arm-none-linux-gnueabi/libc/usr/include -DEMBEST_ARM -I/usr/local/share/arm/boost/src can_wifid.o telnet_client.o -L/usr/local/arm/arm-2007q1/arm-none-linux-gnueabi/libc/usr/lib  -L../lib_embest_arm -L../lib_rms_embest_arm -Wl,-Bdynamic -lutilities -lboost_system -lboost_thread -lcanprovider -lembestcan -o can_wifid

即使只是用getopt解析我的命令行参数，然后在版本消息后调用exit也会导致这个问题（在我的程序中最简单的情况）。有人经历过exit挂着的这种情况吗？

编辑：添加了主要功能第一部分的代码：

struct canwifid_options
{
public:
bool daemon_mode;
int verbosity;
canwifid_options()
{
    this->daemon_mode = false;
    this->verbosity = LOG_NOTICE;
}
};
static canwifid_options options;
int main(int argc, char * argv[])
{
int LoggingOptions = LOG_CONS|LOG_NDELAY|LOG_PID;
pid_t Pid;
ParseCommandLine(argc, argv);
if (!options.daemon_mode)
{
    LoggingOptions |= LOG_PERROR;
}
openlog("can_wifid", LoggingOptions, LOG_USER);
setlogmask(LOG_UPTO(options.verbosity));
if (options.daemon_mode)
{
    Pid = fork();
    if (Pid < 0)
    {
        // couldn't fork off and create a child process
        // log it, %m is a special syslog flag
        syslog(LOG_CRIT, "Unable to create daemon [Error: %m]");
        exit(ESRCH);
    }
    else if (Pid > 0)
    {
        // we're the parent, so we're done and out of here
        exit(EXIT_SUCCESS);
    }
    else
    {
        // we're the child, take control of the session.
        setsid();
        // change to the root directory so we don't retain unnecessary control
        // of any mounted volumes
        chdir("/");
        // clear our file mode creation mask
        umask(0000);
    }
}
else
{
    // get our process ID
    Pid = getpid();
}
syslog(LOG_INFO, "Running as %s", options.daemon_mode ? "daemon" : "standalone");
    // Network code here, snipped for clarity
}

还有ParseCommandLine函数：

static void ParseCommandLine(int argc, char *argv[])
{
int c;
while ((c = getopt(argc, argv, "dhqvDV?")) > 0)
{
    switch (c)
    {
        case 'd':
            options.daemon_mode = true;
            break;
        case 'V':
            VersionMessage(argv);
            exit(EXIT_SUCCESS);
            break;
        case 'q':
            options.verbosity = LOG_WARNING;
            break;
        case 'v':
            options.verbosity = LOG_INFO;
            break;
        case 'D':
            options.verbosity = LOG_DEBUG;
            break;
        case 'h':
        case '?':
        default:
            HelpMessage(argv);
            exit(EXIT_SUCCESS);
            break;
    }
}
return; //done
}