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Date:	Tue, 9 Nov 2021 18:43:53 +0200
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Subject:	Re: [Suspected Spam] Re: DJGPP build of gcc-10.3.0 and make 4.3
	incompatibility
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From:	"Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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On 11/8/21 11:53, J.W. Jagersma (jwjagersma AT gmail DOT com) [via djgpp AT delorie DOT com] wrote:
> On 2021-11-03 15:43, Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp AT delorie DOT com] wrote:
>> Actually gcc-10.3.0 was built for DJGPP, just not uploaded (both RPMs and DJGPP packages). 
>> Uploading could be easy.
>
> I've been waiting for djcross-gcc-10.3.0.tar.bz2, please do upload :)


File was already inside SRPM file so it was available. Just download size was big, Extracted and 
uploaded

>
>> gcc-11 is a different story:
>>
>> - Ada library does not compile - alignment issues which are likely to cause problems also for 
>> other languages like (c or C++) when SSE or AVX is being used (and maybe even with earlier GCC 
>> versions)
>
> What sort of alignment issues?  I already ran into alignment trouble with SSE
> (at run-time, not compile-time).  To work around it, in the linker script I put
> SUBALIGN(0x10) on the .text and .bss sections.  For .data this is not possible
> because it leaves gaps in the ctors/dtors list, so I ended up linking
> *(.data .data.* .gnu.linkonce.d*) in .text.  A bit of a hack but .text is
> writable.  I suppose the input section alignment could be changed in binutils
> somewhere though.
>
> Also in libc I had to put attribute __attribute__((force_align_arg_pointer)) on
> __crt1_startup() to align the stack for ctors & main(). Alternatively this
> alignment could be performed manually in crt0.S.

I was thinking about possible runtime alignment problems.I have not tested it myself. Ada library 
has some alignment checks and as far as I understand refuses to compile as max. available alignment 
is not sufficient (error message is not clear).

Andris

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