Fork#41070: Please include libgccjit with MinGW GCC distribution
Open Date: 2020-12-23 17:28
Last Update: 2021-01-27 19:42
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Last Changes/Comment on this Ticket:
2021-01-27 19:42 Updated by: keith
Comment:
Reply To davidmalcolm
I've now looked through the patches themselves, and suddenly realized that they conflict in places with
https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=c83027f32d9cca84959c7d6a1e519a0129731501
by Nicolas Bértolo which is on "master" for gcc 11, but not on the branches for older releases. It looks like this might do much of what your patches do.
Quite possibly. As Eli has already pointed out, Nicolas is focussed on work for MINGW64 — actually the trademark-infringing mingw-w64 project — whereas my efforts are on behalf of the legitimate owner of the MinGW trademark. I guess it's inevitable that we would come up with some very similar changes. In any case, I'm not at all enthusiastic about the way in which Nicolas has bundled everything into just one patch; I much prefer a coherent series of granular patches, (which I can manage with Mercurial Queues), so that I can more readily adapt to variations between releases, (and to conflicts with other contributors' patches).
Is this patch in the code that you're working with?
No, I don't think so.
What GCC version are you using?
As I mentioned, in an earlier comment, the last GCC release I've published for MinGW is GCC-9.2.0; I've simply been tweaking my existing build tree for that, to explore the feasibility of incorporating libgccjit support, before I move on to GCC-10. (I tend to match my build cycles, as my available time permits, to the native compiler version on my Manjaro-Linux build machine; this is currently GCC-10.2).
Should this be backported; if so, which version?
I already have a significant collection of local patches — 28 currently, with 3 no longer required — which I apply for MinGW releases; I'm quite happy to continue with this publication strategy, so, while backporting may be useful, it's by no means imperative. I will not be looking at anything earlier than GCC-9.2.0, as a MinGW libgccjit candidate.
I'm sorry for not noticing this earlier in this discussion (in my defence it was back in May, and 2020 has been a difficult year).
Don't we all know it :-)
That said, your patches do have additional changes that appear to be necessary (in particular the mutex one). I wonder why Nicholas got it working, but you needed additional patches. Maybe he merely fixed the build, not the actually execution?
I can't speak for anything emanating from the mingw-w64 folks — they are a law on to themselves. Perhaps Nicolas was happy to introduce a dependency on a third-party (their own?) implementation of POSIX threads for Windows. I could have done likewise, but I much prefer the native solution.
Do you have a copyright assignment in place with the FSF?
I do, in respect of my contributions to the GNU troff (groff) project, but not specific to GCC.
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Ticket Status:
Reporter: eliz
Owner: keith
Type: Feature Request
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: GCC
Severity: 5 - Medium
Resolution: None
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Ticket details:
ease add libgccjit to the binaries included in the MinGW GCC distributions.
This is required to be able to build projects that use libgccjit for JIT compilation of code.
One example of this is "gccemacs", a branch of GNU Emacs development (soon to land
on the master branch of Emacs) that compiles Emacs Lisp programs into native x86 code
for faster runtime performance.
Thank you.
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