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Paddle/doc/fluid/new_docs/faq/faq.rst

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编译安装与单元测试
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1. 通过pip安装的PaddlePaddle在 :code:`import paddle.fluid` 报找不到 :code:`libmkldnn.so`:code:`libmklml_intel.so`
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出现这种问题的原因是在导入 :code:`paddle.fluid` 时需要加载 :code:`libmkldnn.so`:code:`libmklml_intel.so`
但是系统没有找到该文件。一般通过pip安装PaddlePaddle时会将 :code:`libmkldnn.so`:code:`libmklml_intel.so`
拷贝到 :code:`/usr/local/lib` 路径下,所以解决办法是将该路径加到 :code:`LD_LIBRARY_PATH` 环境变量下,
即: :code:`export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH`
**注意**如果是在虚拟环境中安装PaddlePaddle :code:`libmkldnn.so`:code:`libmklml_intel.so` 可能不在 :code:`/usr/local/lib` 路径下。