[llvm-bugs] [Bug 48772] New: Ubuntu package set as LLVM 11.1.0, but LLVM 11.1.0 not yet released.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48772

            Bug ID: 48772
           Summary: Ubuntu package set as LLVM 11.1.0, but LLVM 11.1.0 not
                    yet released.
           Product: Packaging
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: deb packages
          Assignee: unassignedbugs at nondot.org
          Reporter: andrzej.warzynski at gmail.com
                CC: llvm-bugs at lists.llvm.org

Hi,

I've just noticed that LLVM 11 packages for Ubuntu Bionic have recently
switched from `LLVM 11.0.0` to `LLVM 11.1.0`. As LLVM 11.1 has not been
released yet (rc1 has just been tagged:
https://lists.llvm.org/pipermail/llvm-dev/2021-January/147827.html), I assume
that this is a bug.

It's quite problematic for me - I maintain a downstream project (*) that is
based on LLVM 11.0.0 and currently I am not able to build it against the binary
packages for Ubuntu Bionic.

HOW TO REPRODUCE:
```
wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
sudo apt-add-repository "deb http://apt.llvm.org/bionic/
llvm-toolchain-bionic-11 main"
sudo apt-get update
sudo apt-get install -y llvm-11 llvm-11-dev clang-11 llvm-11-tools
cat /usr/lib/llvm-11/lib/cmake/llvm/LLVMConfigVersion.cmake
set(PACKAGE_VERSION "11.1.0")

# (...) other output
```

WHEN IT STARTED FAILING:
My most recent successful CI job for this is from 5/1/2021. Today is 16/1/2021.
So this change happened somewhere in that 11 day window.

EXPECTED BEHAVIOUR:
As LLVM 11.0.0 and LLVM 11.1.0 will be ABI incompatible
(https://lists.llvm.org/pipermail/llvm-dev/2021-January/147599.html), I would
expect there to be separate packages for both. 

Thank you for working on this!
-Andrzej

(*) https://github.com/banach-space/llvm-tutor

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