| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: narwhal and PGDLLIMPORT |
| Date: | 2014-02-04 15:43:28 |
| Message-ID: | 12787.1391528608@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2014-02-04 02:10:47 -0500, Tom Lane wrote:
>> Meh. It might be that the DateStyle usage in postgres_fdw would
>> accidentally fail to malfunction if it saw a bogus value of the variable.
>> But it's hard to believe that this would be true of MainLWLockArray.
> There's not that much lwlock usage in contrib. It's just
> pg_stat_statements and pg_buffercache. Neither has tests... So it very
> well could be that breakage simply hasn't been observed.
Hm, you're right --- I'd have thought there were more of those.
Ugh. This problem was bad enough when I thought that it would only lead
to link-time errors detectable in the buildfarm. If it can lead to errors
only observable at runtime --- and maybe not obvious even then --- then
I think we *have to* do something about it. By that I mean that we must
get rid of the need to manually plaster PGDLLIMPORT on global variables.
Anybody with a Windows build environment want to test the "#define extern"
trick?
regards, tom lane
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