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Subject:	Re: DJGPP and WIndows 10 32 bit
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References:	<57265177 DOT 1090701 AT iki DOT fi>
From:	"Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Message-ID:	<477aeafe-789d-c5c7-e91a-453892e3982b@iki.fi>
Date:	Fri, 13 May 2016 07:53:36 +0300
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It seems that I have succeeded to find why DJGPP port of GCC has random preprocessor
failures when run under WIndows 10 32 bit for versions 4.6 and newer.

SVN revision 163446 introduces optimization in libcpp/lex.cc with use of available
SSE* instructions:

https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=2431e8baed362f79e38b5e492a417bf99f24704f

'make bootstrap4' passes OK for Revision 163445
there are random preprocessor failures for 163446 similar as with recent compiler versions.

I'm trying now to build on Win10 32 bit both r163446 and gcc-6.1.0 with this optimization
removed. Let us see results later.

One thing that could potentially have gone wrong under Win10 is saving/restoring SSE registers
on interrupt or task switch. As the result one may randomly gets SSE register contents
corrupted.

Andris

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