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I'm new to Mono development (but not .NET development) - got as far as downloading Visual Studio for Mac and trying to run a sample solution from Alea GPU. It complains that it needs mono64, but I see no option for selecting 64 bit architecture like I would in Windows, and Googling the issue has not turned up an answer I can make sense of. Can I use mono64 in VS for Mac and if so, how?

Stephen Kennedy
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see sharper
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2 Answers2

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Since you are running within VS4M, you need to set the architecture of the run configuration that you are using.

Using an ML (Alea-based) program that I wrote as an example:

Within VS4M:

  • Open the Project Options and go to Run / Configuration / Default:

enter image description here

  • Open the Mono runtime settings and set the Arch to 64-bit:

enter image description here

From the cmd-line:

Mono is 64-bit by default now, so you can run either:

/Library/Frameworks/Mono.framework/Commands/mono MovieMadnessComputeBoxOffice-Alea.exe

or

/Library/Frameworks/Mono.framework/Commands/mono64 MovieMadnessComputeBoxOffice-Alea.exe

Note: On older version of Mono you would have to have used mono --arch=64 .... If you need arch32, you use mono32, but CUDA only has 64 libs so this would not be needed for Alea usage.

Community
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SushiHangover
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  • Works! Though now I get "System dll not found" for libcuda.dylib. Seeing as you've used Alea before, any clue what that's about? Obviously a missing dll, but Alea claims you only need to install Alea via NuGet... – see sharper Aug 25 '17 at 04:39
  • @seesharper I have no idea what that error would be... *Assuming* `System dll` would be referring the .Net assembly System.dll.... You could try to flag the project references with `Local Copy` (right-click on the each System.* project reference), but I do not have it set that way.... If that does not work, post another question with the full exception/stacetrace and include the tag `aleagpu` – SushiHangover Aug 25 '17 at 06:17
  • I did it but inside Build -> Compiler, I only see x86 as the platform still! – Amir Hajiha Aug 23 '19 at 19:43
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    I'm trying this (since obviously 32-bit mono no longer works on Catalina), but my Run Configuration panel has no "General" and "Advanced" tabs. It has only a listbox with columns "Solution Item" and "Run Configuration". No amount of clicking, double-clicking, or right-clicking brings up a screen like your image. Any idea what's going on? – Joe Strout Oct 17 '20 at 13:59
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I got mine to work by setting the Project -> Options to run with 32 bit mono. it all works, see pics. enter image description here

Dr. Roger Webster
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