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What do you think about treating DMD v2.100.x as an LTS release?
Dec 26, 2022
Siarhei Siamashka
Dec 28, 2022
Iain Buclaw
Dec 28, 2022
Jesse Phillips
December 26, 2022
Gravatar of Siarhei SiamashkaPosted by Siarhei SiamashkaReply
Siarhei Siamashka
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This is a spin off from https://forum.dlang.org/post/to2fjp$cqb$1@digitalmars.com

On Thursday, 22 December 2022 at 20:44:50 UTC, Walter Bright wrote:

>

On 12/22/2022 4:05 AM, Siarhei Siamashka wrote:

>

Would selecting some compiler version as LTS and backporting only minor bugfixes to it require too much effort?

If someone wants to volunteer to do this, I would welcome it. In fact, an LTS version isn't even necessary. Any fix could be backported to any previous D release.

Sounds good. How is this going to work in practice?

I think that v2.100.x is a good choice because this frontend version is used by GDC 12. It's included in Ubuntu 22.04 LTS, which is going to be supported at least until April 2027, see https://wiki.ubuntu.com/Releases

GDC 12 itself is likely to have 3 more bugfix updates (12.3, 12.4 and 12.5), see https://gcc.gnu.org/develop.html#timeline

This is the list of GDC related commits from the GCC 12 branch: https://gcc.gnu.org/git/?p=gcc.git&a=search&h=refs%2Fheads%2Freleases%2Fgcc-12&st=author&s=Iain+Buclaw

GDC 12.1 was based on DMD frontend v2.100.0 and GDC 12.2 got it upgraded to v2.100.1

Now I wonder, which frontend version will be used by GDC 12.3? Is it going to be v2.100.2? Are there any plans to backport even more frontend bugfixes for the future GDC 12.4 and GDC 12.5 releases?

December 28, 2022
Gravatar of Iain BuclawPosted by Iain Buclaw
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Iain Buclaw
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On Monday, 26 December 2022 at 02:56:47 UTC, Siarhei Siamashka wrote:

>

Now I wonder, which frontend version will be used by GDC 12.3? Is it going to be v2.100.2? Are there any plans to backport even more frontend bugfixes for the future GDC 12.4 and GDC 12.5 releases?

It's going to be based on v2.100.2, and in principle yes, more bug fixes from upstream dmd will be backported to the 12.x release branch as an when they become necessary.

There already have been some extra changes gone in to fix some porting issues, as well as a few ICEs. I have to mostly rely on someone else creating a gdc bug report for every issue fixed in upstream dmd though so it is in my queue to backport. Otherwise changes made to upstream dmd - even those made by myself - will just end up in mainline only as part of the routine merging of dmd-master -> gdc-13.x.

December 28, 2022
Gravatar of Jesse PhillipsPosted by Jesse Phillips
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On Monday, 26 December 2022 at 02:56:47 UTC, Siarhei Siamashka wrote:

>

This is a spin off from https://forum.dlang.org/post/to2fjp$cqb$1@digitalmars.com

Sounds good. How is this going to work in practice?

I think that v2.100.x is a good choice because this frontend version is used by GDC 12. It's included in Ubuntu 22.04 LTS, which is going to be supported at least until April 2027, see https://wiki.ubuntu.com/

It is really difficult to identify changes and how they apply to different versions. Having a target LTS is good as it provides a version to evaluate if a bug fix can be applied.

If a few people are interested, they could track the bug fixes applied to mainline and try to apply them to the 100.x. This person does not need to come up with the fixes, even just taking one that integrate cleanly would be beneficial.

I would expect that it would not add too much work for a release.