Thread: Warning in pg_backup_archiver.c

Warning in pg_backup_archiver.c

From
Michael Paquier
Date:
Hi,

While compiling on clang, I noticed the following warning:
pg_backup_archiver.c:1950:32: warning: comparison of constant -1 with expression of type 'ArchiveFormat' (aka 'enum _archiveFormat') is always false
      [-Wtautological-constant-out-of-range-compare]
                if ((AH->format = fgetc(fh)) == EOF)
                    ~~~~~~~~~~~~~~~~~~~~~~~~ ^  ~~~
Something like the patch attached calms down the compiler... This has been introduced recently by commit cfa1b4a of the 9th of February.
Regards,
--
Michael
Attachment

Re: Warning in pg_backup_archiver.c

From
Stephen Frost
Date:
Michael,

* Michael Paquier (michael.paquier@gmail.com) wrote:
> While compiling on clang, I noticed the following warning:
> pg_backup_archiver.c:1950:32: warning: comparison of constant -1 with
> expression of type 'ArchiveFormat' (aka 'enum _archiveFormat') is always
> false
>       [-Wtautological-constant-out-of-range-compare]
>                 if ((AH->format = fgetc(fh)) == EOF)
>                     ~~~~~~~~~~~~~~~~~~~~~~~~ ^  ~~~
> Something like the patch attached calms down the compiler... This has been
> introduced recently by commit cfa1b4a of the 9th of February.

I've got a patch for this already, but it's included in a bunch of other
minor cleanup stuff that I'm still playing with.  I hope to commit it
this weekend.
Thanks,
    Stephen