LDAP库多线程调用

在多线程程序中调用ldap_initialize总是莫名其妙的出现

[New Thread 0x9f1feb90 (LWP 1733)]
[New Thread 0x9fbffb90 (LWP 1715)]
[New Thread 0xa0600b90 (LWP 1714)]
[New Thread 0xa1001b90 (LWP 1713)]
[New Thread 0xa1a02b90 (LWP 1712)]
[New Thread 0xa2403b90 (LWP 1711)]
[New Thread 0xa2e04b90 (LWP 1710)]
[New Thread 0xa3805b90 (LWP 1709)]
[New Thread 0xa4206b90 (LWP 1708)]

最后发现原来ldap_initialize不支持多线程的调用，解决方法可以在主线程调用ldap_set_option首先将全局变量初始化，然后子线程调用ldap_initialize就可以了，如下：

int ldap_debug = -1;
ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &ldap_debug);