[BUG] Regression: libHarfBuzzSharp.so uses symbols from the system libharfbuzz.so.0 which causes SIGSEGV

[kekekeks]

This was previously fixed by #2247, however LibraryLoader is only used for netfx builds, net6.0 build doesn't contain it anymore.

As of the issue details, see the original PR

Repro:

Use GtkSharp and the following code:

class Program
{    
    static void Main(string[] args)
    {
        // Causes SIGSEGV
        Gtk.Application.Init();
        var font = new HarfBuzzSharp.Font(new Face((_, _) => null));
        font.TryGetGlyph(65, out _);

        Console.WriteLine("Survived");
    }
}

[kekekeks]

I suspect that the proper solution would be to generate some wrappers with HBSharp_ prefix and mark the list of the symbols as private.

[kekekeks]

Also, linking with -Bsymbolic could help too:

-Bsymbolic
  When creating a shared library, bind references to global symbols to the 
  definition within the shared library, if any. Normally, it is possible 
  for a program linked against a shared library to override the definition 
  within the shared library. 

  This option is only meaningful on ELF platforms which support shared libraries.

-Bsymbolic-functions
  When creating a shared library, bind references to global function symbols 
  to the definition within the shared library, if any.  

  This option is only meaningful on ELF platforms which support shared libraries.