[ECOS] Problems building ecos sources

[Frank Pagliughi]

David Fernandez wrote:

>On Mon, 2006-02-27 at 11:09 +0100, Andrew Lunn wrote:
>  
>
>>On Mon, Feb 27, 2006 at 09:32:59AM +0000, David Fernandez wrote:
>>    
>>
>>>On Mon, 2006-02-27 at 10:22 +0100, Andrew Lunn wrote:
>>>      
>>>
>>>>>	The problem seems to be in the last line:
>>>>>
>>>>>    (_sparg_)      = (CYG_ADDRESS) _regs_;                              \
>>>>>
>>>>>	My gcc version is 4.0.2:
>>>>>          
>>>>>
>>>>That makes sense. Thew macro is being called with:
>>>>
>>>>HAL_THREAD_INIT_CONTEXT((CYG_ADDRWORD)workspace_end,
>>>>                                        breakpoint, trampoline,0);
>>>>
>>>>and (_sparg_) is the first parameter. Edit main.c change the cast to
>>>>(CYG_ADDRESS). It might work, or it might still compain about casting
>>>>the lvalue....
>>>>
>>>>        Andrew
>>>>        
>>>>
>>>	Still complaining, same error.
>>>      
>>>
>>So it looks like you will have to add a new local variable of type
>>CYG_ADDRESS, assign workspace_end to it and then pass the variable to
>>the macro.
>>
>>        Andrew
>>    
>>
>
>	Andrew,
>
>	I think that what you propose is to do:
>
>CYG_ADDRESS workspace_end_int = (CYG_ADDRESS) workspace_end;
>HAL_THREAD_INIT_CONTEXT(workspace_end_int,
>			breakpoint, trampoline, 0);
>workspace_end = (CYG_WORD*)workspace_end_int;
>
>	I propose, to keep the macro useful in saving typing code, and to not
>replicate the functionality of the last line of the macro; to change the
>macro line:
>
>register CYG_WORD* _sp_ = ((CYG_WORD*)((_sparg_) &~15));
>
>into
>
>register CYG_WORD* _sp_ = ((CYG_WORD*)((CYG_ADDRWORD)(_sparg_) &~15));
>
>and get rid of the casting to (CYG_ADDRWORD) in main.
>
>	I think this makes more sense, you cannot cast something to an int, and
>expect to behave as l-value, the macro should receive a variable without
>casting. On the other hand, you can always cast a r-value to int if
>unsure of getting a real int or a pointer.
>
>	Either way, it fixes the problem, and either make and gmake go well
>now.
>
>	Thank you very much Andrew.
>
>David.
>
>
>  
>
Hey all,

I just hit this problem, too, with the latest sources (trying to compile 
RedBoot for the PC with i386-elf-gcc v 4.0.2). I had fixed it in the way 
David described. If no one's done so already, here's the patch.

Frank
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