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Date: Tue, 30 Jul 2024 13:40:24 +0900
To: cygwin AT cygwin DOT com
Subject: Re: Updated: gcc-12.4.0-3
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From: Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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On Mon, 29 Jul 2024 23:02:17 +0900
Takashi Yano wrote:
> On Mon, 29 Jul 2024 07:18:53 +0200
> ASSI wrote:
> > Additionally, a new option '-mno-align-vector-insn' has been implemented
> > (following the lead of MSys2 and using a patch by Kai Tietz) to enable
> > an easier (more targeted) workaround for the underlying stack data
> > alignment problem when passing vector datatypes by value (which is due
> > to a conflict with alignment requirements for SEH and remains unsolved
> > upstream).  You can also use '-Wa,-muse-unaligned-vector-move', which is
> > more widely available.
> 
> gcc of MSYS2 enables -mno-align-vector-insn flag by default.
> However gcc 12.4.0-3 does not enable this flag by default.
> 
> Is this intentional?

Ah, I misunderstood.

For MSYS2,
/usr/bin/gcc       : without Kai's patch
/mingw64/bin/gcc   : -mno-align-vector-insn is enabled by default
/mingw32/bin/gcc   : -mno-align-vector-insn is enabled by default

For current cygwin,
/usr/bin/gcc (12.4.0-3)  : -mno-align-vector-insn is disabled by default
/usr/bin/x86_64-w64-mingw32-gcc : without Kai's patch (yet?)
/usr/bin/i686-w64-mingw32-gcc   : without Kai's patch (yet?)

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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