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Date: Sat, 23 Nov 2013 16:26:59 +0200
From: Andris Pavenis <andris DOT pavenis AT iki DOT fi>
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To: djgpp-workers AT delorie DOT com
Subject: Re: Binutils and LTO in GCC
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On 11/23/2013 03:49 PM, Juan Manuel Guerrero wrote:
> Am 23.11.2013 09:25, schrieb Andris Pavenis:
>> We should discard .gnu.lto_* sections in linker similarly as it
>> is done for Linux
>>
>> /DISCARD/: { *(gnu.lto_*) }
>>
>> Now that at least for current development version of GCC (4.9)
>> one can with some additional modifications enable LTO it would
>> be nice to have support for it also in binutils
>>
>> The related source file is ld/scripttempl/i386go32.sc
>>
>> Andris
>>
>
> Do you need a new release of bnu2232 with the linker script that has the
> DISCARD line added?
>
>
I guess, it is not urgent. We do not yet have released version of GCC
for DJGPP which supports LTO. It is not critical problem like broken
debugging info support, so it can wait. gcc-4.8.3 or gcc-4.9.0 release
is not expected very soon also.

I could also build binutils myself if needed (although I would perhaps
do it under Linux using cross-compiling instead of native build for DJGPP)

Also if one likes to check out, then build of snapshot with LTO support
enabled can be found at:

http://ap1.pp.fi/djgpp/gcc/test/4.9.0-20131121/

I have not done much testing with it. Build bash-2.0.5b using it and
specified CFLAGS="-O2 -g -flto" for building. All seemed to work.

Andris