Ubuntu 15.10 have been released for a couple of days. It is a bleeding-edge system coming with Linux kernel 4.2 and GCC 5. However, compiling and running Caffe on this new system is no longer as smooth as on earlier versions. I have done some research related to this issue and finally find a way out. I summarize it here in this short tutorial and I hope more people and enjoy this new system without breaking their works.
Install NVIDIA Driver
The latest NVIDIA driver is officially included in Ubuntu 15.10 repositories. One can install it directly via
sudo apt-get install nvidia-352-updates nvidia-modprobe
nvidia-modprobe utility is used to load NVIDIA kernel modules and create NVIDIA character device files automatically everytime your machine boots up.
Reboot your machine and verify everything works by issuing
nvidia-smi or running
deviceQuery in CUDA samples.
More infomation related to NVIDIA driver and CUDA installation can be found here.
Install CUDA 7.5
CUDA 7.5 is provided by neither Ubuntu official nor CUDA repositories for Ubuntu 15.10. But we can still install it using
cd ~ wget http://developer.download.nvidia.com/compute/cuda/7.5/Prod/local_installers/cuda_7.5.18_linux.run chmod +x cuda_7.5.18_linux.run ./cuda_7.5.18_linux.run --extract=/home/$USER sudo ./cuda-linux64-rel-7.5.18-19867135.run
Follow the instructions there and configure runtime library after the installation finishes.
sudo bash -c "echo /usr/local/cuda/lib64/ > /etc/ld.so.conf.d/cuda.conf" sudo ldconfig
Install all other dependencies
Follow instructions here
cd ~ git clone https://github.com/BVLC/caffe.git
By now you should be unable to compile it due to serveral incompatibility problems. Let's fix them one by one.
Hack CUDA to support GCC 5
By default, CUDA 7.5 does not support compling with GCC 4.10 or later versions. It will report the following errors when compiling Caffe.
In file included from /usr/local/cuda/include/cuda_runtime.h:76:0, from <command-line>:0: /usr/local/cuda/include/host_config.h:115:2: error: #error -- unsupported GNU version! gcc versions later than 4.9 are not supported! #error -- unsupported GNU version! gcc versions later than 4.9 are not supported! ^
You can try install
g++-4.9 to solve this problem temporarily. But the linker will report
undefined references errors later because all other libraries (
opencv) in Ubuntu 15.10 are compiled with GCC version 5.2. They are not compatible.
To solve this problem we have to "hack" the CUDA toolkit by editing
/usr/local/cuda/include/host_config.h. Comment line 115.
--- #error -- unsupported GNU version! gcc versions later than 4.9 are not supported! +++ //#error -- unsupported GNU version! gcc versions later than 4.9 are not supported!
hdf5 naming problem
Your machine may report the following error when compiling Caffe even though
libhdf5-serial-dev package has been already installed in it.
./include/caffe/util/hdf5.hpp:6:18: fatal error: hdf5.h: No such file or directory
This is because of change of default path and name of
hdf5 head files and libraries in Ubuntu 15.10. To solve this problem, we can simply modify
INCLUDE_DIRS at line 85 in
--- INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/include +++ INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/include /usr/include/hdf5/serial/
hdf5_serial at line 173 in
--- LIBRARIES += glog gflags protobuf boost_system boost_filesystem m hdf5_hl hdf5 +++ LIBRARIES += glog gflags protobuf boost_system boost_filesystem m hdf5_serial_hl hdf5_serial
Compile and Test Caffe
By now, all incompatibility issues should have been solved. We can start to compile and test Caffe.
cd ~/caffe make -j8 make test -j8 make runtest -j8
Hopefully all tests pass.
sudo make runtestonce may help you fix a lot of runtime errors until next reboot, although it is not a recommended way.
- You might need to append
/etc/environmentand reboot your machine if there are runtime errors related to
locale::facet::_S_create_c_locale name not valid.