Hello,

llvmlite barely managed to be updated to llvm-15, and then llvm-15 was
removed from Debian.

There's a bit of work on llvmlite to support llvm19 https://github.com/numba/llvmlite/pull/1092
but it looks like it doesn't work yet.

Unfortunately for a number of python tools, numba can't be installed
without llvmlite, and I'm not sure how we can have a version of
llvmlite available for the next release?

It can be built against llvm-15, but we'd somehow need that to be added
back to python, and then there's hoping that llvmlite could be updated
to llvm-19.

After writing this email I'm going to try building the llvm19 branch to
see what happens but as all the reported tests had failed, and the logs
had been deleted, I don't have high hopes.

Do you have any ideas of what could be done to help get a version of
llvmlite that works with numba into Debian?

Diane

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On Tue, 2025-02-18 at 09:50 -0800, Diane Trout wrote:

Do you have any ideas of what could be done to help get a version of
llvmlite that works with numba into Debian?

No idea. I'm keeping an eye on upstream release but the only option
I can see to make it work is to depend on the LLVM version that does
not exist in unstable.

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On Tue, 2025-02-18 at 13:41 -0500, M. Zhou wrote:

On Tue, 2025-02-18 at 09:50 -0800, Diane Trout wrote:

Do you have any ideas of what could be done to help get a version
of
llvmlite that works with numba into Debian?

No idea. I'm keeping an eye on upstream release but the only option
I can see to make it work is to depend on the LLVM version that does
not exist in unstable.

I found some time and energy to rebase the 1092 llvm-19 compatibility
branch against 0.44.0
https://github.com/detrout/llvmlite/tree/llvm19

I reported on the PR that the rebase almost works. https://github.com/numba/llvmlite/pull/1092#issuecomment-2693122561

2 tests fail on x86_64 and 0 tests fail on arm64, both out of 379
tests.

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No idea. I'm keeping an eye on upstream release but the only option
I can see to make it work is to depend on the LLVM version that does
not exist in unstable.

I found some time and energy to rebase the 1092 llvm-19 compatibility
branch against 0.44.0
https://github.com/detrout/llvmlite/tree/llvm19

I reported on the PR that the rebase almost works. https://github.com/numba/llvmlite/pull/1092#issuecomment-2693122561

2 tests fail on x86_64 and 0 tests fail on arm64, both out of 379
tests.

some news ?

friendly ping :))

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On Tue, 2025-03-18 at 14:08 +0100, PICCA Frederic-Emmanuel wrote:

some news ?

friendly ping :))

I was waiting to see if I could get some advice from upstream.

I added a bit more to the upstream bug about what's different between
llvm 15 and 19 for one of the failing test.

https://github.com/numba/llvmlite/pull/1092

I pushed my backport of the llvm-19 patch and general package updates
to llvm-19 to https://salsa.debian.org/diane/llvmlite

This currently has a patch to mark the two failing tests as
"expectedFailures" because I thought it'd be useful to take this build
and see how well numba works with it.

Diane

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Hi,

I have a version of llvmlite that builds against llvm-19 with 2 test
failures that don't look to important. One of them is definitely just
the layout of the object file changed from what was expected.

I got most of the help in the comments in here: https://github.com/numba/llvmlite/pull/1092

Additionally with some other patches I was able to get numba to build
with this version of llvmlite and with numpy 2.2 and all it's tests
passed on x86_64. It also got through some tests on arm64 before it
timed out.

I pushed all my changes to llvmlite to
https://salsa.debian.org/diane/llvmlite
at commit 17e84a9243ba92a9248e7415c84a980e0ff96886

The important bit is this patch from upstream https://salsa.debian.org/diane/llvmlite/-/blob/master/debian/patches/llvm-19-support-pr1182.patch?ref_type=heads
And this patch skips/expects the two failed tests https://salsa.debian.org/diane/llvmlite/-/blob/master/debian/patches/skip-llvm-19-broken-tests.patch?ref_type=heads

I also pushed all my changes to numba for it to build with the above
version of llvmlite and numpy 2.2 https://salsa.debian.org/science-team/numba.git

(numba should work, though I had to merge a small change to the tests
that I forgot to push to salsa a while ago, and it's building again,
but I'm tired and it'll take a while to run through all the tests
again)

I hope it's still not too late to get numba back in to testing.

Diane

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Hi Diane!

Diane Trout <[email protected]> writes:

Hi,

I have a version of llvmlite that builds against llvm-19 with 2 test
failures that don't look to important. One of them is definitely just
the layout of the object file changed from what was expected.

I got most of the help in the comments in here: https://github.com/numba/llvmlite/pull/1092

[snip]

I also pushed all my changes to numba for it to build with the above
version of llvmlite and numpy 2.2 https://salsa.debian.org/science-team/numba.git

(numba should work, though I had to merge a small change to the tests
that I forgot to push to salsa a while ago, and it's building again,
but I'm tired and it'll take a while to run through all the tests
again)

I hope it's still not too late to get numba back in to testing.

Has a bug been filed against llvmlite? If not, shouldn't there be one?
It seems to be that the worst case scenario would be a friendly NMU, and
a bug is required for that.

If llvmlite counts as a toolchain package then release team approval for
an unblock will also be needed. The release team tends to get
progressively busier as the release approaches, so filing an unblock authorisation bug sooner rather than later demonstrates courtesy and
goodwill imho. I believe that you will find support for a cherry-picked llvmlite fix, because you have been working towards supporting Trixie's
release goals since February :)

I'm not sure if this link:

https://lists.debian.org/msgid-search/[email protected]

should go at the llvmlite bug, or the release team bug, or both.


Please feel free to keep me in CC, because I'd appreciate the
encouragement of seeing that our processes still work.

Kind regards,
Nicholas

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Hi Diane,

Thank you for working on this.

Do you have LLVM team write access? If so please help your self and
directly push the commits there. If not, please open a merge request
and I'll process it quickly.

On Tue, 2025-04-08 at 22:59 -0700, Diane Trout wrote:

Hi,

I have a version of llvmlite that builds against llvm-19 with 2 test
failures that don't look to important. One of them is definitely just
the layout of the object file changed from what was expected.

I got most of the help in the comments in here: https://github.com/numba/llvmlite/pull/1092

Additionally with some other patches I was able to get numba to build
with this version of llvmlite and with numpy 2.2 and all it's tests
passed on x86_64. It also got through some tests on arm64 before it
timed out.

I pushed all my changes to llvmlite to https://salsa.debian.org/diane/llvmlite
at commit 17e84a9243ba92a9248e7415c84a980e0ff96886

The important bit is this patch from upstream https://salsa.debian.org/diane/llvmlite/-/blob/master/debian/patches/llvm-19-support-pr1182.patch?ref_type=heads
And this patch skips/expects the two failed tests https://salsa.debian.org/diane/llvmlite/-/blob/master/debian/patches/skip-llvm-19-broken-tests.patch?ref_type=heads

I also pushed all my changes to numba for it to build with the above
version of llvmlite and numpy 2.2 https://salsa.debian.org/science-team/numba.git

(numba should work, though I had to merge a small change to the tests
that I forgot to push to salsa a while ago, and it's building again,
but I'm tired and it'll take a while to run through all the tests
again)

I hope it's still not too late to get numba back in to testing.

Diane

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On Wed, 2025-04-09 at 20:58 -0400, Nicholas D Steeves wrote:

Hello,

Has a bug been filed against llvmlite?  If not, shouldn't there be
one?

So it's not clear if there is a bug here.

The problem is the llvmlite upstream is currently release is targeting
llvm-15, which debian removed for being.

Picking up a fix someone else made and updating it I got llvmlite to
build against llvm-19 which is in debian, they helped clean up my fixes
a bit more and suggested a new PR to use.

Updating to 19 is just listed in their
"Continuous Discussin: LLVM update plan" https://github.com/numba/llvmlite/issues/1048

It seems to be that the worst case scenario would be a friendly NMU,
and
a bug is required for that.

Ah ok. the regular maintainer for llvmlite M. Zhou responded a bit
after you and it looks like they're willing to update it shortly.

If llvmlite counts as a toolchain package then release team approval
for
an unblock will also be needed.  The release team tends to get

I don't know if llvmlite is a toolchain package, though it also fell
out of testing because the version of llvm it used was removed, so this
package looks to be an improvement over no package.

llvmlite fix, because you have been working towards supporting
Trixie's
release goals since February :)

I don't lot of free time, and was hoping upstream would fix it but
realized we were almost out of time and managed to get the last bits
pushed over the finish line.

I'm not sure if this link:

  https://lists.debian.org/msgid-search/[email protected]

should go at the llvmlite bug, or the release team bug, or both.

Ok.

I guess my plan is pass the fixes to llvmlite to lumin, then push
numba, see how things build, and then go talk to the release team?

Diane

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On Wed, 2025-04-09 at 21:00 -0400, M. Zhou wrote:

Hi Diane,

Thank you for working on this.

Do you have LLVM team write access? If so please help your self and
directly push the commits there. If not, please open a merge request
and I'll process it quickly.

I don't have llvm team write access, which is good because I almost accidentally pushed a change to your repository instead of mine.

I don't know if you need the pristine-tar and upstream branches as
merge requests, as I haven't done a salsa based pull request before.

but here's the important one.

https://salsa.debian.org/pkg-llvm-team/llvmlite/-/merge_requests/5

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