postgresql_{11,12,13,14}: build with support for JIT compilation #149517
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https://www.postgresql.org/docs/current/jit-reason.html This commit is largely a copy of dasJ's work in NixOS#124804 (comment) and andir's https://github.com/NixOS/nixpkgs/pull/124804/files
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Motivation for this change
This is a WIP PR for testing PostgreSQL with support for the LLVM-based JIT.
This is based almost entirely on @andir and @dasJ's work in #124804. My only real contribution here is to fix the build of
periodsandpostgiswhen postgres is built with clang.I tested only
postgresql_14(14.1) with extensionsperiodsandpostgison NixOS 21.11, and did not test other versions, macOS, or other extensions.I am unable to finish this PR right now, and I also didn't find the JIT very useful, as it caused a GIN
CREATE INDEXon an expression to use 100GB of RAM and crash the PostgreSQL server. There are similar reports of the JIT causing issues on the web and on the People, Postgres, Data Discord.Things done
sandbox = trueset innix.conf? (See Nix manual)nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage./result/bin/)nixos/doc/manual/md-to-db.shto update generated release notes