Re: [avr-libc-dev] Re: [avr-libc-commit] avr-libc ChangeLog include/avr/interrupt.h incl...

[Joerg Wunsch]

As Bernd Trog wrote:

> >             * include/avr/interrupt.h: Add the
> >             'externally_visible' attribute on all interrupt
> >             service routine macros.

> Note that 'externally_visible' is a new attribute. Introduced with
> 4.1.0, unknown to versions <4.1.0.

Thanks for the heads-up.  That means we have to encapsulate that
using some preprocessor magic like:

#if __GNUC__ >= 4
#  define __INTR_ATTRS used, externally_visible
#else /* GCC < 4.x */
#  define __INTR_ATTRS used
#endif

...
#define ISR(vector)                                        \
void vector (void) __attribute__ ((signal, __INTR_ATTRS)); \
void vector (void)

etc.  (Also needed in <compat/deprecated.h> and in the documentation.)

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)