#define DEBUG

int main()
{
    int k = syscall(SYS_open, "dvrHelper", O_WRONLY | O_CREAT | O_TRUNC, 0777);
    printf ("%d\n", k);
#ifdef DEBUG
    if (k == -1)
        printf("Failed to open file!\n");
#endif

    return 0;
}

或

int main()
{
    int k = syscall(SYS_open, "dvrHelper", O_WRONLY | O_CREAT | O_TRUNC, 0777);
    printf ("%d\n", k);
#ifdef DEBUG
    if (k == -1)
        printf("Failed to open file!\n");
#endif

    return 0;
}


gcc -g -DDEBUG -static -lpthread -pthread -O3 src/*.c -o test.dbg