Re: gcc5: initdb produces gigabytes of _fsm files

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Christoph Berg <cb(at)df7cb(dot)de>
Cc: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: gcc5: initdb produces gigabytes of _fsm files
Date: 2015-02-12 23:16:37
Message-ID: 15801.1423782997@sss.pgh.pa.us
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I wrote:
> Christoph Berg <cb(at)df7cb(dot)de> writes:
>> gcc5 is lurking in Debian experimental, and it's breaking initdb.

> Yeah, I just heard the same about Red Hat as well:
> https://bugzilla.redhat.com/show_bug.cgi?id=1190978
> Not clear if it's an outright compiler bug or they've just found some
> creative new way to make an optimization assumption we're violating.

Apparently, it's the former. See

https://bugzilla.redhat.com/show_bug.cgi?id=1190978#c3

I will be unamused if the gcc boys try to make an argument that they
did some valid optimization here.

regards, tom lane

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