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tkacvins opened this issue Sep 3, 2021 · 5 comments · Fixed by #43
Closed

Using a relocated Mono #27

tkacvins opened this issue Sep 3, 2021 · 5 comments · Fixed by #43

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@tkacvins
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tkacvins commented Sep 3, 2021 •
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Environment

  • Pythonnet version: 2.5.2
  • Python version: 3.9.2
  • Operating System: CentOS 7
  • .NET Runtime: 4.5

Details

  • I relocated the mono I built from source (in preparation for embedding mono in a product) and got this
The assembly mscorlib.dll was not found or could not be loaded.
It should have been installed in the `/opt/mono-6.8.0.123/lib/mono/4.5/mscorlib.dll' directory.

My understanding is mono can be relocated, but it requires invoking their C API to set the assembly paths, etc...
It would be nice if clr-loader could enable this by calling the right functions from libmono-2.so

I found this problem after relocating mono by running

echo "import clr" | python3
@tkacvins
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tkacvins commented Sep 4, 2021

This web page

https://www.mono-project.com/docs/advanced/embedding/

describe the C API functions from mono that would need to be called to allow use of a relocatable mono.

@filmor
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filmor commented Sep 9, 2021

Contributions are welcome. The project that does the loading of libmono is https://github.com/pythonnet/clr-loader. The loading is implemented in https://github.com/pythonnet/clr-loader/blob/master/clr_loader/mono.py, if you need additional API functions you can add their signature in https://github.com/pythonnet/clr-loader/blob/master/clr_loader/ffi/mono.py.

@tkacvins
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OK, I will endeavor to do this. I am wondering if setting an environment variable to the relocated mono is the way to go. If that environment variable is set, call the mono C API routines for setting up mono for its new location, and if not, don't call those routines

@filmor filmor transferred this issue from pythonnet/pythonnet Jul 8, 2022
@filmor filmor changed the title Feature request - allowing Python.NET to used a relocated mono Using a relocated Mono Sep 16, 2022
@filmor
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filmor commented Sep 16, 2022

If I see this correctly, this is really just a matter of calling mono_set_dirs.

@tkacvins
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Agreed, I had determined that using mono_set_dirs is what I want to use, but I never had a chance to roll back around to this.

@koubaa koubaa mentioned this issue Dec 20, 2022
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@filmor filmor closed this as completed in #43 Jan 3, 2023
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Add support for mono_set_dirs koubaa/clr-loader
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@filmor @tkacvins