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* Embedded SQL: Putting a guard around included stdio.h for convenience
@ 2003-10-01 22:57 Carsten Klein <carstenklein@yahoo.de>
2003-10-08 03:16 ` Re: Embedded SQL: Putting a guard around included stdio.h for convenience Tom Lane <tgl@sss.pgh.pa.us>
2003-10-08 07:18 ` Re: Embedded SQL: Putting a guard around included stdio.h for convenience Michael Meskes <meskes@postgresql.org>
0 siblings, 2 replies; 5+ messages in thread
From: Carsten Klein @ 2003-10-01 22:57 UTC (permalink / raw)
To: pgsql-interfaces
Hi all,
I have just tried to compile an application consisting of multiple
modules, each of them encapsulation access to a single table of
the default database, using embedded sql.
Well, until now, I have had problems with stuff being declared twice
(from stdio.h and successively included include files by stdio.h),
since postgres sources seemingly do not put a guard around the include
statement.
what i mean is, please, do include the following:
#ifndef _STDIO_H
#include <stdio.h>
#endif /* _STDIO_H */
This seemingly is not being generated by the ecpg or included in the
header files being included.
And while we are at it, although I personally think that Embedded SQL is
quite obsolete by now (but we have to do this stuff in school, perhaps
I'm wrong),
please check other parts of your source referencing (including) external
include files, where there is no guard around the include statement. It
makes things
tedious and nearly impossible to solve, when they are not there...
Thanks.
Carsten Klein
^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: Embedded SQL: Putting a guard around included stdio.h for convenience
2003-10-01 22:57 Embedded SQL: Putting a guard around included stdio.h for convenience Carsten Klein <carstenklein@yahoo.de>
@ 2003-10-08 03:16 ` Tom Lane <tgl@sss.pgh.pa.us>
2003-10-08 10:27 ` Re: Embedded SQL: Putting a guard around included stdio.h for convenience Peter Galbavy <peter.galbavy@knowtion.net>
1 sibling, 1 reply; 5+ messages in thread
From: Tom Lane @ 2003-10-08 03:16 UTC (permalink / raw)
To: carstenklein@yahoo.de; +Cc: pgsql-interfaces
Carsten Klein <carstenklein@yahoo.de> writes:
> what i mean is, please, do include the following:
> #ifndef _STDIO_H
> #include <stdio.h>
> #endif /* _STDIO_H */
What platform are you on, that is so brain-dead that stdio.h doesn't
do this for itself?
regards, tom lane
^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: Embedded SQL: Putting a guard around included stdio.h for convenience
2003-10-01 22:57 Embedded SQL: Putting a guard around included stdio.h for convenience Carsten Klein <carstenklein@yahoo.de>
2003-10-08 03:16 ` Re: Embedded SQL: Putting a guard around included stdio.h for convenience Tom Lane <tgl@sss.pgh.pa.us>
@ 2003-10-08 10:27 ` Peter Galbavy <peter.galbavy@knowtion.net>
2003-10-08 18:23 ` Re: Embedded SQL: Putting a guard around included Peter Eisentraut <peter_e@gmx.net>
0 siblings, 1 reply; 5+ messages in thread
From: Peter Galbavy @ 2003-10-08 10:27 UTC (permalink / raw)
To: carstenklein@yahoo.de; Tom Lane <tgl@sss.pgh.pa.us>; +Cc: pgsql-interfaces
Tom Lane wrote:
> What platform are you on, that is so brain-dead that stdio.h doesn't
> do this for itself?
Does POSIX say anything about multiple inclusion of this and others ?
(Genuine question, I do not have the "standards" to hand.)
Peter
^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: Embedded SQL: Putting a guard around included
2003-10-01 22:57 Embedded SQL: Putting a guard around included stdio.h for convenience Carsten Klein <carstenklein@yahoo.de>
2003-10-08 03:16 ` Re: Embedded SQL: Putting a guard around included stdio.h for convenience Tom Lane <tgl@sss.pgh.pa.us>
2003-10-08 10:27 ` Re: Embedded SQL: Putting a guard around included stdio.h for convenience Peter Galbavy <peter.galbavy@knowtion.net>
@ 2003-10-08 18:23 ` Peter Eisentraut <peter_e@gmx.net>
0 siblings, 0 replies; 5+ messages in thread
From: Peter Eisentraut @ 2003-10-08 18:23 UTC (permalink / raw)
To: Peter Galbavy <peter.galbavy@knowtion.net>; +Cc: carstenklein@yahoo.de, Tom Lane <tgl@sss.pgh.pa.us>; pgsql-interfaces
Peter Galbavy writes:
> Does POSIX say anything about multiple inclusion of this and others ?
"Except that the effect of each inclusion of <assert.h> depends on the
definition of NDEBUG, headers may be included in any order, and each may
be included more than once in a given scope, with no difference in effect
from that of being included only once."
--
Peter Eisentraut peter_e@gmx.net
^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: Embedded SQL: Putting a guard around included stdio.h for convenience
2003-10-01 22:57 Embedded SQL: Putting a guard around included stdio.h for convenience Carsten Klein <carstenklein@yahoo.de>
@ 2003-10-08 07:18 ` Michael Meskes <meskes@postgresql.org>
1 sibling, 0 replies; 5+ messages in thread
From: Michael Meskes @ 2003-10-08 07:18 UTC (permalink / raw)
To: Carsten Klein <carstenklein@yahoo.de>; +Cc: pgsql-interfaces
On Thu, Oct 02, 2003 at 12:57:37AM +0200, Carsten Klein wrote:
> Well, until now, I have had problems with stuff being declared twice
> (from stdio.h and successively included include files by stdio.h),
> since postgres sources seemingly do not put a guard around the include
> statement.
>
> what i mean is, please, do include the following:
>
> #ifndef _STDIO_H
> #include <stdio.h>
> #endif /* _STDIO_H */
As Tom already pointed out it is stdio.h's job to guard against double
inclusion. The ifndef should be listed in stdio.h and certainly is on my
Debian system.
> And while we are at it, although I personally think that Embedded SQL is
> quite obsolete by now (but we have to do this stuff in school, perhaps
> I'm wrong),
Why is it obsolete?
Michael
--
Michael Meskes
Email: Michael at Fam-Meskes dot De
ICQ: 179140304, AIM/Yahoo: michaelmeskes, Jabber: meskes@jabber.org
Go SF 49ers! Go Rhein Fire! Use Debian GNU/Linux! Use PostgreSQL!
^ permalink raw reply [nested|flat] 5+ messages in thread
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2003-10-01 22:57 Embedded SQL: Putting a guard around included stdio.h for convenience Carsten Klein <carstenklein@yahoo.de>
2003-10-08 03:16 ` Tom Lane <tgl@sss.pgh.pa.us>
2003-10-08 10:27 ` Peter Galbavy <peter.galbavy@knowtion.net>
2003-10-08 18:23 ` Re: Embedded SQL: Putting a guard around included Peter Eisentraut <peter_e@gmx.net>
2003-10-08 07:18 ` Michael Meskes <meskes@postgresql.org>
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