[Gnash-dev] Re: Hello world working with OpenLaszlo

[P T Withington]

On 2007-03-01, at 04:25 EST, strk wrote:

> I finally handled to have an 'hello world' trace working.
> This is the source code:
>
>   <canvas>
>   <script when="immediate">
>   trace("Hello world");
>   </script>
>   </canvas>
>
> Note that 'when="immediate"' is required for this to work.
>
> Also, this *only* works if I wipe out LFC7.lzl, making it
> an *empty* SWF (any target version seems fine).
>
>
> I'm now proceeding by incrementally adding components
> of the LFC7.lzl back in, but I don't understand a simple thing:
> what language are the .lzs written in ? :)

.lzs files are our 'extended' javascript.  They are Javascript 1 with  
some Javascript 2 extensions (such as `class` declarations) and some  
private extensions (such as #pragma).

> I tried adding trace() calls there, but w/out success, it seems..

That looks like a 'feature' in the compiler.  It seems that it  
intentionally compiles away any `trace` calls.  Perhaps this was to  
avoid debug output in production.

Try building your LFC with:

  buildlfc -DcompileTrace=flash ...