On Sat, May 9, 2020 at 12:05 AM Beckmann, Tom <
Tom.Beckmann at student.hpi.uni-potsdam.de> wrote:

> Hi there!
>
> Replacing the whole #openGLLibraryName method with a simple
> ^ 'GL'
> should work, as long as you adapt your LD_LIBRARY_PATH to include the arch
> specific libraries. For example adding
> export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/lib/x86_64-linux-gnu/"
> in your squeak.sh before the vm gets started should make sure that the
> image finds libgl*. Of course, if your libgl.so.1 is not found under that
> path, adjust accordingly.
>
> Alternatively, you can also specify the absolute path to the library, e.g.
> ^ '/usr/lib/x86_64-linux-gnu/libGL.so'
> which may be a safer option to start from if you're having troubles
> getting it to run.
>

'libGL.so' typically is installed by the opengl dev package as a symlink to
'libGL.so.1'. The user package installs 'libGL.so.1' and will *not* be
found by the VM if you just specify 'GL' because the VM will only
automatically try the '.so' suffix but not '.so.1'.

That is why 'libGL.so.1' is indeed the correct value to be returned from
openGLLibraryName on Linux.


> For the apicall:'s, if you inspect the byte codes of the method, you will
> in fact notice that is has already been replaced for you. This happens in
> OpenGL>>#privateInstallLibrary:, but only updates the method's bytecode,
> not its source code (which is good, because otherwise this would end up in
> commits or your changes file).
>

Yep. As Levente mentioned, you need to switch your browser to show
decompiled code to see the actual methods being executed.

You will also see that apicall has been replaced by cdecl which is the
right calling convention on Linux.

- Vanessa -


>
> Best,
> Tom
>
>
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