Hi Thomas, It looks like some gcc 4.7-s don't work with CUDA, although I've been using various Ubuntu/Linaro versions, most recently 4.7.2 and had no issues whatsoever. Some people seem to have bumped into the same problem (see http://goo.gl/1onBz or http://goo.gl/JEnuk) and the suggested fix is to put #undef _GLIBCXX_ATOMIC_BUILTINS #undef _GLIBCXX_USE_INT128 in a header and pre-include it for nvcc by calling it like this: nvcc --pre-include undef_atomics_int128.h
Cheers, -- Szilárd On Sun, Dec 9, 2012 at 12:18 PM, Thomas Evangelidis <teva...@gmail.com>wrote: > > > gcc 4.7.2 is not supported by any CUDA version. > > > > > > > I suggest that you just fix it by editing the include/host_config.h and > > changing the version check macro (line 82 AFAIK). I've never had real > > problems with using new and officially not supported gcc-s, the version > > check is more of a promise from NVIDIA that "we've tested thoroughly > > internally and we more or less vouch for thins combination". > > > > Cheers, > > -- > > Szilárd > > > > PS: > > Disclamer: I don't take responsibility if your machine goes up in flames! > > ;) > > > > > Hi Szilárd,, > > I tried to compile gromacs-4.6beta1, is this the version you suggested? If > not, please indicate how to download the source cause I am confused with > all these development versions. > > Anyway, this is the error I get with 4.6beta1, gcc 4.7.2 and cuda 5: > > [ 0%] Building NVCC (Device) object > > src/gromacs/gmxlib/cuda_tools/CMakeFiles/cuda_tools.dir//./cuda_tools_generated_cudautils.cu.o > > /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/ext/atomicity.h(48): > error: identifier "__atomic_fetch_add" is undefined > > > /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/ext/atomicity.h(52): > error: identifier "__atomic_fetch_add" is undefined > > 2 errors detected in the compilation of > "/tmp/tmpxft_00002394_00000000-9_cudautils.compute_30.cpp1.ii". > CMake Error at cuda_tools_generated_cudautils.cu.o.cmake:252 (message): > Error generating file > > > /home/thomas/Programs/gromacs-4.6-beta1_gnu_cuda5_build/src/gromacs/gmxlib/cuda_tools/CMakeFiles/cuda_tools.dir//./cuda_tools_generated_cudautils.cu.o > > > gmake[3]: *** > > [src/gromacs/gmxlib/cuda_tools/CMakeFiles/cuda_tools.dir/./cuda_tools_generated_cudautils.cu.o] > Error 1 > gmake[2]: *** [src/gromacs/gmxlib/cuda_tools/CMakeFiles/cuda_tools.dir/all] > Error 2 > gmake[1]: *** [src/programs/mdrun/CMakeFiles/mdrun.dir/rule] Error 2 > gmake: *** [mdrun] Error 2 > > > Unless I am missing something, cuda 5 does not support gcc 4.7.2. > > > Thomas > -- > gmx-users mailing list gmx-users@gromacs.org > http://lists.gromacs.org/mailman/listinfo/gmx-users > * Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/Search before posting! > * Please don't post (un)subscribe requests to the list. Use the > www interface or send it to gmx-users-requ...@gromacs.org. > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > -- gmx-users mailing list gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! * Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-users-requ...@gromacs.org. * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
