Re: Re: [PATCH] Compile without warning with gcc's -Wtype-limits, -Wempty-body

Peter Eisentraut <peter_e@gmx.net>

From: Peter Eisentraut <peter_e@gmx.net>
To: Andres Freund <andres@2ndquadrant.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers@postgresql.org
Date: 2013-01-16T15:11:23Z
Lists: pgsql-hackers
On 1/15/13 6:36 AM, Andres Freund wrote:
> I just think that the price of fixing a single Assert() that hasn't
> changed in years where the variable isn't likely to ever get signed is
> acceptable.

Well, once you get past that one change you proposed, you will also find

pg_standby.c: In function 'SetWALFileNameForCleanup':
pg_standby.c:348:3: error: comparison of unsigned expression >= 0 is
always true [-Werror=type-limits]

(which, curiously, is the only one that clang complains about).

I don't like removing safety checks from code when there is no other
mechanism that could make up for it somehow.

I think the best practice at the moment, as with most gcc -Wextra
warnings, is to manually check them once in a while.



Commits

  1. Return value of lseek() can be negative on failure.