Thread: compile warnings in CVS

compile warnings in CVS

From
Neil Conway
Date:
I get the following compiling the current CVS code with gcc 3.1:

...
fe-connect.c: In function `connectDBComplete':
fe-connect.c:1081: warning: suggest parentheses around && within ||
fe-connect.c:1086: warning: implicit declaration of function `gettimeofday'
...
pg_controldata.c: In function `main':
pg_controldata.c:91: warning: `%c' yields only last 2 digits of year in some locales
pg_controldata.c:93: warning: `%c' yields only last 2 digits of year in some locales

Cheers,

Neil

-- 
Neil Conway <neilconway@rogers.com>
PGP Key ID: DB3C29FC



Re: compile warnings in CVS

From
Neil Conway
Date:
Neil Conway <nconway@klamath.dyndns.org> writes:
> I get the following compiling the current CVS code with gcc 3.1:

I also get 4 regression test failures, due to Gavin's improvements to
the parser error messages. AFAICT no actual problems, the expected
error message strings just needed to be updated.

Cheers,

Neil

-- 
Neil Conway <neilconway@rogers.com>
PGP Key ID: DB3C29FC



Re: compile warnings in CVS

From
Tom Lane
Date:
Neil Conway <nconway@klamath.dyndns.org> writes:
> pg_controldata.c: In function `main':
> pg_controldata.c:91: warning: `%c' yields only last 2 digits of year in some locales
> pg_controldata.c:93: warning: `%c' yields only last 2 digits of year in some locales

Yeah.  I was willing to ignore that while pg_controldata was in contrib,
but it's much more annoying when it's in the main tree.  Anyone know if
gcc has a --not-quite-so-nannyish warnings mode?

IMHO %c is a perfectly reasonable format choice --- the strftime man
page defines it as         %c        Locale's appropriate date and time representation.
While we could go over to some %Y-%M-etc-etc notation, that doesn't
strike me as a step forward.  pg_controldata's output should be
conveniently human-readable IMHO, and that means following local
conventions.

Another alternative ischar *fmt = "%c";...strftime(..., fmt, ...);

which I think will probably defeat gcc's check (haven't tried it
though).

Does anyone want to argue that %c is actually a bad choice?  I think
gcc's just being unreasonable here, but maybe I'm missing something
(and no, Y2K arguments won't change my mind).
        regards, tom lane


Re: compile warnings in CVS

From
Bruce Momjian
Date:
OK, I have fixed the first two with the following patch.  The second
pair Tom has commented on.

---------------------------------------------------------------------------

Neil Conway wrote:
> I get the following compiling the current CVS code with gcc 3.1:
>
> ...
> fe-connect.c: In function `connectDBComplete':
> fe-connect.c:1081: warning: suggest parentheses around && within ||
> fe-connect.c:1086: warning: implicit declaration of function `gettimeofday'
> ...
> pg_controldata.c: In function `main':
> pg_controldata.c:91: warning: `%c' yields only last 2 digits of year in some locales
> pg_controldata.c:93: warning: `%c' yields only last 2 digits of year in some locales
>
> Cheers,
>
> Neil
>
> --
> Neil Conway <neilconway@rogers.com>
> PGP Key ID: DB3C29FC
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
Index: src/interfaces/libpq/fe-connect.c
===================================================================
RCS file: /cvsroot/pgsql-server/src/interfaces/libpq/fe-connect.c,v
retrieving revision 1.192
diff -c -r1.192 fe-connect.c
*** src/interfaces/libpq/fe-connect.c    17 Aug 2002 12:33:17 -0000    1.192
--- src/interfaces/libpq/fe-connect.c    18 Aug 2002 00:04:07 -0000
***************
*** 19,24 ****
--- 19,25 ----
  #include <fcntl.h>
  #include <errno.h>
  #include <ctype.h>
+ #include <time.h>

  #include "libpq-fe.h"
  #include "libpq-int.h"
***************
*** 1078,1095 ****
        }


!       while (NULL == rp || remains.tv_sec > 0 || remains.tv_sec == 0 && remains.tv_usec > 0)
        {
          /*
                 * If connecting timeout is set, get current time.
                 */
!               if ( NULL != rp && -1 == gettimeofday(&start_time, NULL))
                {
                        conn->status = CONNECTION_BAD;
                        return 0;
                }

!               /*
           * Wait, if necessary.    Note that the initial state (just after
           * PQconnectStart) is to wait for the socket to select for
           * writing.
--- 1079,1096 ----
        }


!       while (rp == NULL || remains.tv_sec > 0 || (remains.tv_sec == 0 && remains.tv_usec > 0))
        {
          /*
                 * If connecting timeout is set, get current time.
                 */
!               if (rp != NULL && gettimeofday(&start_time, NULL) == -1)
                {
                        conn->status = CONNECTION_BAD;
                        return 0;
                }

!         /*
           * Wait, if necessary.    Note that the initial state (just after
           * PQconnectStart) is to wait for the socket to select for
           * writing.

Re: compile warnings in CVS

From
Bruce Momjian
Date:
Yes, very nanny-ish.  Not sure how to turn it off.

---------------------------------------------------------------------------

Tom Lane wrote:
> Neil Conway <nconway@klamath.dyndns.org> writes:
> > pg_controldata.c: In function `main':
> > pg_controldata.c:91: warning: `%c' yields only last 2 digits of year in some locales
> > pg_controldata.c:93: warning: `%c' yields only last 2 digits of year in some locales
> 
> Yeah.  I was willing to ignore that while pg_controldata was in contrib,
> but it's much more annoying when it's in the main tree.  Anyone know if
> gcc has a --not-quite-so-nannyish warnings mode?
> 
> IMHO %c is a perfectly reasonable format choice --- the strftime man
> page defines it as
>           %c        Locale's appropriate date and time representation.
> While we could go over to some %Y-%M-etc-etc notation, that doesn't
> strike me as a step forward.  pg_controldata's output should be
> conveniently human-readable IMHO, and that means following local
> conventions.
> 
> Another alternative is
>     char *fmt = "%c";
>     ...
>     strftime(..., fmt, ...);
> 
> which I think will probably defeat gcc's check (haven't tried it
> though).
> 
> Does anyone want to argue that %c is actually a bad choice?  I think
> gcc's just being unreasonable here, but maybe I'm missing something
> (and no, Y2K arguments won't change my mind).
> 
>             regards, tom lane
> 
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> message can get through to the mailing list cleanly
> 

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073
 


Re: compile warnings in CVS

From
Bruce Momjian
Date:
I have applied patches to the regression test to fix this.  Thanks.

---------------------------------------------------------------------------

Neil Conway wrote:
> Neil Conway <nconway@klamath.dyndns.org> writes:
> > I get the following compiling the current CVS code with gcc 3.1:
> 
> I also get 4 regression test failures, due to Gavin's improvements to
> the parser error messages. AFAICT no actual problems, the expected
> error message strings just needed to be updated.
> 
> Cheers,
> 
> Neil
> 
> -- 
> Neil Conway <neilconway@rogers.com>
> PGP Key ID: DB3C29FC
> 
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 3: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to majordomo@postgresql.org so that your
> message can get through to the mailing list cleanly
> 

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073
 


Re: compile warnings in CVS

From
Tom Lane
Date:
I said:
> Another alternative is
>     char *fmt = "%c";
>     ...
>     strftime(..., fmt, ...);
> which I think will probably defeat gcc's check (haven't tried it
> though).

I tried this, and it did shut up the warning in my local copy of gcc.
So I committed it.

> Does anyone want to argue that %c is actually a bad choice?

This is still open to debate if anyone wants to make the case...
        regards, tom lane