Re: [avr-libc-dev] Re: [avr-gcc-list] Two interrupts one function?

[Eric Weddington]

Joerg Wunsch wrote:
> As Eric Weddington wrote:
>
>
> > > you could insert in your irq routine the line
>
>
> > > asm (".global __vector_3\n\t .equ __vector_3, __vector_13");
>
>
> > > Where __vector_13 is the main name of your irq function and
> > > __vector_3 is the alias that you are newly defining. This way, you
> > > will be avoiding the unnecessary jump.
>
>
> Another option is to pass this to the linker as a --defsym option.

Yeah, but that means getting users to modify their Makefile, and you 
know how hard *that* is for some/most Windows users...

It would still be better if it were a macro available in avr-libc, 
because of that.


> > Would it be worth it to work this up in a C macro and add it to
> > avr-libc?
>
>
> I'd be more happy if AVR-GCC implemented the
> __attribute__((alias(...))).  It would allow something like

I like that idea too!

<definition snipped>

> Alas, when trying to compile it:
>
> % avr-gcc -mmcu=atmega128 -c foo.c
> foo.c:13: error: alias definitions not supported in this configuration

Hmpf.

--
Eric Weddington