Re: [avr-gcc-list] How to do multi-line assembler macros?

[David Gay]

Joerg Wunsch wrote:
> As Marek Michalkiewicz <address@hidden> wrote:
> > I haven't seen '$' used as part of identifiers in any real C sources,
> > I don't think it is part of the C standard.

The gcc web page says this about it: "Traditional C allowed the character `$' to 
form part of identifiers.  However, ISO C and C++ forbid `$' in identifiers.". 
The C99 standard has a comment about $ in identifiers being a "common extension"...

> It's certainly not part of the standard, but see
>
> http://gcc.gnu.org/onlinedocs/gcc-3.3.1/gcc/Dollar-Signs.html
>
> IMHO, the AVR target thus classifies as a target machine where the
> assembler does not allow them, so they would best be disabled at the
> compiler level.

Ick. We (TinyOS) are relying on them in generated code (and use a modified 
assembler...). It would be reasonable to make the default to forbid $, but then 
-fdollars-in-identifiers should work to reenable them.

David Gay
address@hidden