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Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and
From: |
Weddington, Eric |
Subject: |
Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature? |
Date: |
Mon, 18 Jun 2012 18:23:52 +0000 |
> -----Original Message-----
> From: address@hidden [mailto:avr-
> address@hidden On Behalf Of Georg-
> Johann Lay
> Sent: Monday, June 18, 2012 11:31 AM
> To: Bob Paddock
> Cc: AVR-GCC
> Subject: Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable()
> and .signature?
>
> > LTO has removed .signature, resulting in avr-objdump giving an error
> > about .signature not being found.
>
> I don't know about the guts of .signature.
>
> Maybe it has the wrong section flags or needs a KEEP in the linker
> script. If it's not referenced from C code (is it?) then it can
> be thrown away. If there is an object in .signature that is
> needed but never used, use __attribute__((__used__)) to indicate
> it is used despite not referenced.
>
IIRC, It's not referenced from the C code, but we would like to keep it in the
final ELF file.
Maybe the __used__ attribute is what is needed. That, and the linker script
should be double checked.
Eric
- [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Bob Paddock, 2012/06/18
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Weddington, Eric, 2012/06/18
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Georg-Johann Lay, 2012/06/18
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?,
Weddington, Eric <=
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Bob Paddock, 2012/06/18
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Georg-Johann Lay, 2012/06/18
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Bob Paddock, 2012/06/19
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Georg-Johann Lay, 2012/06/21
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Bob Paddock, 2012/06/26
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Georg-Johann Lay, 2012/06/30
- Re: [avr-gcc-list] Link Time Optimization vs __builtin_unreachable() and .signature?, Bob Paddock, 2012/06/30