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	Wed, 06 Sep 2023 14:11:19 -0700 (PDT)
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Date:	Wed, 6 Sep 2023 23:11:18 +0200
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Subject:	Re: gcc-13
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From:	"J.W. Jagersma (jwjagersma AT gmail DOT com) [via djgpp-workers AT delorie DOT com]" <djgpp-workers AT delorie DOT com>
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On 2023-09-06 16:34, Andris Pavēnis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com] wrote:
> On 9/6/23 01:03, J.W. Jagersma (jwjagersma AT gmail DOT com) [via djgpp-workers AT delorie DOT com] wrote:
>> On 2023-09-04 18:29, Andris Pavēnis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com] wrote:
>>> I finally uploaded a month old build of gcc-13.2.0 to http://www.delorie.com/pub/djgpp/beta/v2gnu/
>> Thank you!  Will try building a cross-compiler soon.
> 
> For cross-compiler GIT tag djgpp/gcc-13.2.0 on https://github.com/apavenis/djgpp-gcc should be preferred as there is no need to regenerate GNU automake/autoconf related files for this tag (no changes to theese files).
> 
> Also libstdc++-v3 configure does not do entire check for libc features, when cross-compiling it,   and as result library setup is different from one of native build. I though about doing cross-native build from Linux (--build=x86_64-linux-gnu --host=i586-pc-msdosdjgpp --target=i586-pc-msdosdjpp). I have tried, but it would be not a nice idea to build official packages that way before that libstdc++-v3 problem is solved

Didn't know that.  I suppose it has to compile and run some native programs
for feature detection?  Do you happen to know which features that affects?  I
only ever use a cross-gcc but never noticed anything missing.

>> On 2023-09-05 19:17, Andris Pavēnis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com] wrote:
>>>>> - no testing at all for such new C++20 feature as C++ modules - they may not work at all. I do not
>>>>> know. And it is highly unlikely that I'll try to fix it if it does not work
>>>> Modules were a huge change, and I don't think GCC fully supports them
>>>> yet anyways.
>>>>
>>> I had to exclude several ways of module support (only one left) as they were unusable for DJGPP
>> Does this also apply to cross-compilers or only to native?  I doubt there will
>> be many module-only libraries, so it's probably not very important.
>>
> Checked what I have changed (already for gcc-12) and it is changes is for case when __DJGPP__ is defined, so for building compiler with DJGPP even cross-compiler for DJGPP target
> 
> - https://github.com/apavenis/djgpp-gcc/commit/4a343fe0afb32fd451f5a6f6851334cce0d1e6a8

So the compiler needs to communicate with the build system via sockets?  That
is more complicated than I expected, and I see how that would be difficult to
support for native.

Also, I thought gcc 13 would include a Rust compiler, but it seems that's been
postponed to gcc 14.  Don't need it myself, but I know some people would be
interested in having that for djgpp.

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