How to understand gcc source code?

[Basile STARYNKEVITCH]

Aaron Gray wrote:
>>   * what is the proportion of cross-compilation? I have no real clue. 
>> I would suppose that during all the GCC runs in the last month, only a 
>> minority was cross-compilation (for some embedded systems). Of these, 
>> what are the favorite target machines & systems. I really don't know 
>> this one (maybe ARM or PowerPC32?).
> 
> Don't forget all the Linux based routers like OpenWRT and Netgear 
> devices that are cross compiled using GCC. GCC+Linux is very scalable !

Aren't they often ARM boards running Linux? But usually, you cross 
compile (on Linux/x86 or AMD64, towards target Linux/ARM or whatever)...

I'm more interested in figures from the GCC user perspective. A device 
with some embedded Linux, even if sold in the millions, has its software 
probably compiled only a few times for the last release (and perhaps a 
thousand times for its entire development). Linux based routers could 
not run the GCC compiler (inside the router)!

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Basile STARYNKEVITCH         http://starynkevitch.net/Basile/
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