I used to compile successfully caffe with WITH_PYTHON_LAYER:=1 on Ubuntu 14.04. Then I switched to Ubuntu 16.04, using the same settings but different built-in software such as g++ 5.4 for 16.04 instead of g++ 4.8 for 14.04, I failed to compile caffe with python. Would you please give me some advice on this issue? The following is part of the error message I got
.build_release/lib/libcaffe.so: undefined reference to `std::overflow_error::overflow_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' .build_release/lib/libcaffe.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::find(char, unsigned long) const' .build_release/lib/libcaffe.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct(unsigned long, char)' /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/libboost_python.so: undefined reference to `std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >::_M_construct(unsigned long, wchar_t)@GLIBCXX_3.4.21' //usr/lib/x86_64-linux-gnu/libtbb.so.2: undefined reference to `std::out_of_range::out_of_range(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)@GLIBCXX_3.4.21' /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/libgflags.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const@GLIBCXX_3.4.21' /usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/libglog.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_create(unsigned long&, unsigned long)@GLIBCXX_3.4.21' .build_release/lib/libcaffe.so: undefined reference to `std::out_of_range::out_of_range(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' collect2: error: ld returned 1 exit status Makefile:619: recipe for target '.build_release/tools/caffe.bin' failed make: *** [.build_release/tools/caffe.bin] Error 1
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Answer
Following the official installation instruction with cmake solves this problem.
Steps to solution:
1. in your CAFFE/ directory run make clean
2. the follow in instruction of compile_caffe_with_cmake.