Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?

[Joerg Wunsch]

Bob Paddock <address@hidden> wrote:

> Added __used__ in <avr\signature.h> and avr-objdump -s -j .signature
> is working again:

(Btw., use <avr/signature.h> rather than the backslash, that makes
your projects more portable.  MS-DOS understands the forward slash
since the days of version 3.x.  It's only command.com and cmd.exe that
don't understand it.9

Thanks for testing, I added the "used" attribute in avr-libc.  I also
changed the spelling of the "section" attribute to __section__ in
order to force it into the implementation namespace.

> const unsigned char __signature[3] __attribute__((__used__))
> __attribute__((section (".signature"))) =
>  { SIGNATURE_2, SIGNATURE_1, SIGNATURE_0 };

Btw., you can combine several attributes like:

.... __attribute__((__used__, __section__("foo")))

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

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