> 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
