Re: JIT breaks PostGIS

Re: Andres Freund 2018-07-22 <20180722185106.qxc5ie745tqdazgq@alap3.anarazel.de>
> > Does that mean JIT is not ready for prime time yet and should be
> > disabled in default installations? Or does it just mean that llvm 4.0
> > is old?
> 
> I don't know yet, it's probably just some small bug. But let me debug it
> first.

Sure.

The question will be coming up eventually, though, and I think the
options on the packaging side are:

1) Disable jit completely
2) Compile --with-llvm, but disable jit in the config by default
3) Compile --with-llvm, but disable jit for older llvm versions
4) Enable jit everywhere where llvm >= 3.9 is available

Option 4 is what the Debian packages implement now, but it might make
sense to go to 2 or 3 for PG11 (only).

Christoph