In this earlier posting I had written, that I had installed GCC / CPP / C++ 4.8.4, alongside versions 6.3, on my computer named ‘Phosphene’, even though Debian / Stretch computers are not meant by design, to offer earlier versions of those compilers. And I had done so, specifically so that I’d be able to compile CUDA 8 projects, for which GCC version 6 is too high.
One possible CUDA project would have been ArrayFire 3.7.0, or version 3.6.3 of that same library. However, what I found was that these latest versions of ArrayFire require a stronger compiler, than v4.8.
Well what I have now been able to do is, to compile ArrayFire 3.5.1 using the GCC 4.8.4 tool-chain, and to do so, even with CUDA support.
This is higher than what Debian Maintainers could do, if only because the package-repository version of ArrayFire do not include CUDA back-ends, only OpenCL back-ends. This proves that my GCC 4.8.4, compatibility tool-chain is correctly installed.
The question which I must now ponder is, whether I should next install v3.5.1 of ArrayFire to my root file-system, replacing v3.7.0, just because the lower version gives me CUDA support. I might not because v3.7.0 already gives me OpenCL support. Either way, I built v3.5.1
with the configuration option, to ‘Use System Forge’, which may mean that I won’t need to recompile Forge, which was compiled as version 1.0.4, and as belonging to ArrayFire 3.7.0.
Installing v3.5.1 to my root file-system would be a necessary step, to verify whether the Demos actually run, since all ArrayFire Demos need to be linked to the same library-versions that their ArrayFire build generated.
What I have found is twofold:
- The Configuration option ‘Use System Forge’ will not work, when the installed version of Forge is 1.0.4. This needs to be unchecked, and the integrated version of Forge built, and installed, and
- Even though the exercise compiled, it will not run.
When trying to run a CUDA executable, I get the error message:
terminate called after throwing an instance of 'std::regex_error' what(): regex_error Aborted
What this result means is that I have not been able to confirm that compiling and linking projects to CUDA finally works, using the platform I’ve created, even though the actual compilation produces no error message.