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        Thu, 26 Jul 2018 10:44:14 -0700 (PDT)
Subject: Re: missing errnos for std::filesystem
To: djgpp AT delorie DOT com
References: <a4f3df8a-42d7-fc38-686c-ddcbf89d1bac AT gmail DOT com>
 <bc4c0f63-30d2-bce0-fde9-b6c0abf144d5 AT iki DOT fi>
From: "J.W. Jagersma (jwjagersma AT gmail DOT com) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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Date: Thu, 26 Jul 2018 19:43:24 +0200
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On 2018-07-26 18:23, Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via 
djgpp AT delorie DOT com] wrote:
 > Only adding them to DJGPP's errno.h in CVS version would make port of
 > GCC incompatible with currently available released version 2.05. I do
 > not think that anybody would like that.

That seems sensible. I suppose adding these constants would be possible 
in a future 2.06 release. (are there any plans for that?)


 > See DJGPP related changes inside:
 >
 > 
ftp://ftp.delorie.com/pub/djgpp/rpms/djcross-gcc-8.1.0/djcross-gcc-8.1.0.tar.bz2 

 >
 >
 > My changes to libstdc++-v3/config/os/djgpp/error_constants.h does not
 > exclude possibility to modify also DJGPP's errno.h.

Ah, of course. I forgot about the diffs in djcross. That looks like a 
good workaround, and also explains why I was able to build 8.1 with 
filesystem, but not 8.2.
A question though: why is there a separate package with these diffs? 
Wouldn't it make more sense to merge them with upstream gcc?

On a less related note, I found this bug in gcc the other day that 
affects djgpp:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86651
Thought you might want to be aware of it.