Re: PostgreSQL 12, JIT defaults

On October 8, 2018 8:10:45 AM PDT, Andres Freund <andres@anarazel.de> wrote:
>
>
>On October 8, 2018 8:03:56 AM PDT, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> This seems, at best, rather user-unfriendly.
>>And it's not like our conventions for other compile-option-affected
>>GUCs, eg the SSL ones.
>
>That was intentional, even though it perhaps should be better
>documented. That allows a distro to build and distribute pg without
>llvm enabled, but then have the JIT package with all the dependencies
>separately. The pg yum packages do so.

There's a function for checking whether JIT is actually available, BTW. pg_jit_available(). That also works if somebody
installsan extension that's not ours (by setting jit_provider =  ...). 


Andres

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