Ubuntu16.04下 caffe make all時報錯：
/usr/bin/ld: cannot find -lhdf5_hl
/usr/bin/ld: cannot find -lhdf5
collect2: error: ld returned 1 exit status
Makefile:502: recipe for target ‘.build_release/lib/libcaffe.so’ failed
make: * [.build_release/lib/libcaffe.so] Error 1
解決辦法如下：
1）首先檢查自己的hdf5是否安裝成功：sudo apt-get install libhdf5-serial-dev，如果顯示libhdf5-serial-dev is already the newest version則證明安裝成功，跳轉下一步；
2）嘗試修改Makefile.config文件下的LIBRARY_DIRS，具體實現爲：
LIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib /usr/lib/x86_64-linux-gnu/hdf5/serial
更多技術細節可參考：https://groups.google.com/forum/#!topic/caffe-users/gOLL29NmTwA