| From: | Zsolt Parragi <zsolt(dot)parragi(at)percona(dot)com> |
|---|---|
| To: | Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com> |
| Cc: | Peter Eisentraut <peter(at)eisentraut(dot)org>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Andres Freund <andres(at)anarazel(dot)de> |
| Subject: | Re: meson vs. llvm bitcode files |
| Date: | 2026-03-25 21:56:00 |
| Message-ID: | CAN4CZFO0XdH+9BZRLC4P=+zCZ3WUvkwGMc0jEV92CfPaU0ePpw@mail.gmail.com |
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| Lists: | pgsql-hackers |
> I couldn't reproduce this. There are 43 .bc files and header change (I
> changed simd.h) triggers a recompilation of only 'postgres.index.bc'
> on my end. This behavior seems correct to me. Could you please share
> steps to reproduce the behavior you saw?
I can reliably reproduce it on multiple computers.
patch applied on top of 009833ef2002430b1f8fae3a8e47718642b7a5d9,
default meson build with only -Dllvm=enabled
both on ubuntu 24.04/openSUSE tumbleweed with meson 1.3.2, ninja 1.11.1/1.13.2
ninja # to ensure I built everything
ninja # nothing happens, up to date
touch ../src/include/port/simd.h && time ninja -j$(nproc) 2>&1
[884/884] Generating src/backend/jit/llvm/bitcode/postgres with a custom command
ninja -j$(nproc) 2>&1 188.04s user 31.36s system 4541% cpu 4.831 total
touch ../src/include/port/simd.h && ninja -j$(nproc) 2>&1 -n | grep bc | wc -l
796
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