CUDA ECM

[chris2be8]

And I've managed to get msieve to work. But I'm not sure exactly how. Updating the Makefile to cc = clang and cub/Makefile to add -ccbin clang to NVCCFLAGS is certainly necessary. But I also updated it to only compile support for sm20 (it takes nvcc several minutes to compile support for each sm) and it seems to fail if I don't do that.

I'll post if I manage to pin down exactly what's required.

Chris

[chris2be8]

I've pinned down the cause. If the makefiles say clang then it works. If they say clang-3.8 then it fails. Which is surprising because clang and clang-3.8 are the same program:

chris@rigel:~$ which clang
/usr/bin/clang
chris@rigel:~$ which clang-3.8 
/usr/bin/clang-3.8
chris@rigel:~$ ls -l /usr/bin/clang /usr/bin/clang-3.8
lrwxrwxrwx 1 root root 25 Apr 18  2017 /usr/bin/clang -> ../lib/llvm-3.8/bin/clang
lrwxrwxrwx 1 root root 25 Jun  2  2017 /usr/bin/clang-3.8 -> ../lib/llvm-3.8/bin/clang
chris@rigel:~$ ls -li -L /usr/bin/clang /usr/bin/clang-3.8
1060650 -rwxr-xr-x 1 root root 24294616 Jun  2  2017 /usr/bin/clang
1060650 -rwxr-xr-x 1 root root 24294616 Jun  2  2017 /usr/bin/clang-3.8

Has anyone any idea why that makes a difference?

Chris