On Tue, 2016-03-01 at 17:15 +0100, Andreas Beckmann wrote: > > amd64 should be more or less ready for going to experimental, more > testing would be welcome!
I successfully built CUDA 7.5 locally on amd64 with trunk. > I tried the cuda code samples (see README.Debian), and most built (only > those few that link with -lcudadevrt seem to miss a -lcudart). I didn't > try to actually run even one of them :-) Months ago I tested CUDA 7.5 + GCC-5 for my ITP package "caffe"[1], and the result shows it works. My experience on an ArchLinux workstation also confirms that GCC-5.X works very well with CUDA 7.5 . > What's the status of using CUDA 7.5 with GCC 6 (already in experimental)? > Right now I blocked this version in the header check and the gcc/g++ > wrappers also ignore that version, so you need to ensure you are really > testing with g++-6. If it doesn't blow up, we should enable it as well. It appears that NVCC doesn't work with GCC-6 [2], according to my preliminary test. So if this is not a BUG of GCC-6, and GCC-6 code is basically frozen, we should block GCC-6 for CUDA 7.5. However eventually we need CUDA >= 8.0 for stretch, as the default compiler of stretch will be GCC-6. -----------------GCC-6---------------------- # make -j1 [ 1%] Running C++/Python protocol buffer compiler on /tmp/caffe/src/caffe/proto/caffe.proto Scanning dependencies of target proto [ 1%] Building CXX object src/caffe/CMakeFiles/proto.dir/__/__/include/caffe/proto/caffe.pb.cc.o [ 2%] Linking CXX static library ../../lib/libproto.a [ 2%] Built target proto [ 4%] Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/layers/cuda_compile_generated_eltwise_layer.cu.o /usr/lib/gcc/x86_64-linux-gnu/6/include/stddef.h(436): error: identifier "nullptr" is undefined /usr/lib/gcc/x86_64-linux-gnu/6/include/stddef.h(436): error: expected a ";" /usr/include/x86_64-linux-gnu/c++/6/bits/c++config.h(202): error: expected a ";" [...Full of error...] ---------------GCC-5------------------------ # make -j1 [ 1%] Running C++/Python protocol buffer compiler on /tmp/caffe/src/caffe/proto/caffe.proto Scanning dependencies of target proto [ 1%] Building CXX object src/caffe/CMakeFiles/proto.dir/__/__/include/caffe/proto/caffe.pb.cc.o [ 2%] Linking CXX static library ../../lib/libproto.a [ 2%] Built target proto [ 4%] Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/layers/cuda_compile_generated_eltwise_layer.cu.o [ 4%] Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/util/cuda_compile_generated_im2col.cu.o [ 4%] Building NVCC (Device) object src/caffe/CMakeFiles/cuda_compile.dir/util/cuda_compile_generated_math_functions.cu.o [...Nothing wrong...] > Looking at ppc64el now ... Will test ppc64el later. The upload of CUDA7.5 will unblock one of my ITP bug, thanks! > > Andreas [1] git.d.o debian-science/caffe [2] install GCC-6 with aptitude
