Trying this out on a Raspberry Pi (obviously).
First major problem is that

OGLUnix>>openGLLibraryName
        ^Smalltalk osVersion = 'linux'
                ifTrue: ['libGL.so.1']
                ifFalse: ['GL']
has a #'' (apparently a ByteSymbol with just char value 0 in it) at the end of the method ; which of course a BlockClosure does not understand.

After 'fixing' that it goes on a little until we get to OpenGL>>#glMatrixMode:
glMatrixMode: mode
        "This method was automatically generated."
        "void glMatrixMode(GLenum mode);"
        <apicall: void 'glMatrixMode' (ulong) module: '#openGLLibraryName'>
        ^self externalCallFailed

The" module: '#openGLLibraryName'>" looks a bit odd to me... shouldn't that have been recompiled to use the real library name?