Requiring LLVM 14+ in PostgreSQL 18

Thomas Munro <thomas.munro@gmail.com>

From: Thomas Munro <thomas.munro@gmail.com>

To: pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2024-04-10T01:38:33Z

Lists: pgsql-hackers

Attachments

0001-jit-Require-at-least-LLVM-14-if-enabled.patch (text/x-patch) patch 0001
0002-jit-Use-opaque-pointers-in-all-supported-LLVM-versio.patch (text/x-patch) patch 0002

Hi

PostgreSQL 18 will ship after these vacuum horizon systems reach EOL[1]:

animal | arch | llvm_version | os | os_release | end_of_support
---------------+---------+--------------+--------+------------+----------------
branta | s390x | 10.0.0 | Ubuntu | 20.04 | 2025-04-01
splitfin | aarch64 | 10.0.0 | Ubuntu | 20.04 | 2025-04-01
urutau | s390x | 10.0.0 | Ubuntu | 20.04 | 2025-04-01
massasauga | aarch64 | 11.1.0 | Amazon | 2 | 2025-06-30
snakefly | aarch64 | 11.1.0 | Amazon | 2 | 2025-06-30

Therefore, some time after the tree re-opens for hacking, we could rip
out a bunch of support code for LLVM 10-13, and then rip out support
for pre-opaque-pointer mode.  Please see attached.

[1] https://www.postgresql.org/message-id/CA%2BhUKG%2B-g61yq7Ce4aoZtBDO98b4GXH8Cu3zxVk-Zn1Vh7TKpA%40mail.gmail.com

Commits

doc: remove llvm-config search from configure documentation
- 0c7ec3b3a03b 17.0 landed
- 4baff5013277 18.0 landed
jit: Remove {llvm-config,clang}-N configure probes.
- 4dd29b683334 17.0 landed