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Re: Compiler warnings in psqloodbc 08.03.0200

From: Zoltan Boszormenyi <zb(at)cybertec(dot)at>
To: Hiroshi Inoue <inoue(at)tpf(dot)co(dot)jp>
Cc: Hiroshi Saito <z-saito(at)guitar(dot)ocn(dot)ne(dot)jp>, pgsql-odbc(at)postgresql(dot)org, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Hans-Juergen Schoenig <hs(at)cybertec(dot)at>
Subject: Re: Compiler warnings in psqloodbc 08.03.0200
Date: 2008-10-01 05:28:27
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-odbc
Hiroshi Inoue írta:
> Zoltan Boszormenyi wrote:
>> Hi,
>> here's the fix for all non-pointer-signedness warnings,
>> against 08.03.0300 that was released meanwhile. Now
>> the compilation only emits 246 "differ in signedness"
>> warnings, which is still too much noise. I agree with
>> Tom Lane that those should be cleaned up if for nothing
>> else, than the real bugs don't get lost in the noise.
> Thanks.
>> In pgapi30.c, two instances of
>> "cast from pointer to integer of different size"
> They may come from the strange handling of unixODBC's
> 64bit ODBC. Honestly I don't understand how to use
> 64-bit unixODBC correctly. Probably you can remove the
>  warnings by #defining BUILD_REAL_64_BIT_MODE somewhere.

I'll try it but the CAST_PTR() seems to be working
in both 32 and 64-bit. BUILD_REAL_64_BIT_MODE
should be defined by the autoconf machinery if needed.

>> In psqlodbc.c()::finalize_global_cs() is only used inside
>> "#ifdef WIN32" but was defined outside causing a
>> "defined but not used" warning.
> It is also used in _fini() when __GNUC__ isn't defined.
> Though I'm not familiar with *nix systems, it seems
> strange to me that there's no function with
> __attribute__((destructor)) while init() function
> with __attribute__((constrcutor)) is used under
>  __GNUC__ mode.

So, because of boolean logic:
A v (!A ^ !B) = A v !B
something like below would work:

#if defined(WIN32) || !defined(__GNUC__)

around finalize_global_cs().

Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH

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