看看连接的那一行，确定所有的Lib库的包含文件都在正确的位置。通常你可能没用'-ldl' 并且有任何的必须Lib库或者是使用的数据库有问题。
如果你连接Apache 1.2.x，是否记得配置文件中加到EXTRA_LIBS的附加信息，并重新运行Apache配置文件？参考英文的INSTALL文件，有更多的信息。
有些人回复说使用'-ldl'，马上跟着'libphp3.a'连接Apache也是相同的。
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