hstore compiler warnings

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From: Kevin Grittner <kgrittn(at)ymail(dot)com>
To: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: hstore compiler warnings
Date: 2013-03-21 14:46:38
Message-ID: 1363877198.13805.YahooMailNeo@web162904.mail.bf1.yahoo.com
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Is anyone looking at these?:

hstore_io.c: In function ‘hstore_to_json_loose’:
hstore_io.c:1312:5: warning: ignoring return value of ‘strtol’, declared with attribute warn_unused_result [-Wunused-result]
hstore_io.c:1324:6: warning: ignoring return value of ‘strtod’, declared with attribute warn_unused_result [-Wunused-result]

gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2

These warnings seem to have started with:

http://git.postgresql.org/gitweb/?p=postgresql.git;h=38fb4d978c5bfc377ef979e2595e3472744a3b05

--
Kevin Grittner
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Kevin Grittner <kgrittn(at)ymail(dot)com>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: hstore compiler warnings
Date: 2013-03-21 15:18:04
Message-ID: 514B24AC.6080904@dunslane.net
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On 03/21/2013 10:46 AM, Kevin Grittner wrote:
> Is anyone looking at these?:
>
> hstore_io.c: In function ‘hstore_to_json_loose’:
> hstore_io.c:1312:5: warning: ignoring return value of ‘strtol’, declared with attribute warn_unused_result [-Wunused-result]
> hstore_io.c:1324:6: warning: ignoring return value of ‘strtod’, declared with attribute warn_unused_result [-Wunused-result]
>
> gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
>
> These warnings seem to have started with:
>
> http://git.postgresql.org/gitweb/?p=postgresql.git;h=38fb4d978c5bfc377ef979e2595e3472744a3b05

I thought we'd got rid of those. And they don't pop up on my F16 dev box
(gcc 4.6.2)

I'll check it out.

cheers

andrew


From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Kevin Grittner <kgrittn(at)ymail(dot)com>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: hstore compiler warnings
Date: 2013-03-21 18:50:48
Message-ID: 514B5688.8090506@dunslane.net
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On 03/21/2013 11:18 AM, Andrew Dunstan wrote:
>
> On 03/21/2013 10:46 AM, Kevin Grittner wrote:
>> Is anyone looking at these?:
>>
>> hstore_io.c: In function ‘hstore_to_json_loose’:
>> hstore_io.c:1312:5: warning: ignoring return value of ‘strtol’,
>> declared with attribute warn_unused_result [-Wunused-result]
>> hstore_io.c:1324:6: warning: ignoring return value of ‘strtod’,
>> declared with attribute warn_unused_result [-Wunused-result]
>>
>> gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
>>
>> These warnings seem to have started with:
>>
>> http://git.postgresql.org/gitweb/?p=postgresql.git;h=38fb4d978c5bfc377ef979e2595e3472744a3b05
>>
>
>
> I thought we'd got rid of those. And they don't pop up on my F16 dev
> box (gcc 4.6.2)
>
> I'll check it out.

This is the only thing that I have found to work with very recent gcc.
Seems ugly. Anyone got a better idea?

cheers

andrew

Attachment Content-Type Size
unused-fix.patch text/x-patch 1.2 KB

From: Kevin Grittner <kgrittn(at)ymail(dot)com>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: hstore compiler warnings
Date: 2013-03-21 19:16:51
Message-ID: 1363893411.1298.YahooMailNeo@web162903.mail.bf1.yahoo.com
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Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:

> [assign to local variable and then `(void) varname;` to avoid "unused" warning]

> This is the only thing that I have found to work with very recent gcc. Seems

> ugly. Anyone got a better idea?

That seems to be what we've used elsewhere.

http://www.postgresql.org/message-id/24446.1318973105@sss.pgh.pa.us

--
Kevin Grittner
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company