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IDS Forum

Re: Can't compile SQLCMD

Posted By: Jonathan Leffler
Date: Monday, 19 October 2015, at 4:54 a.m.

In Response To: Re: Can't compile SQLCMD (RAY BURNS)

Well done on resolving the problem.

I'll look into this, but I'm not sure that I necessarily want to support
such ancient versions of GCC. I know; RHEL 6 is relatively modern (first
release 2010; still in production 1 phase until 2016Q2), even if the
compiler that ships with it is not. It makes life difficult or a
maintainer.

Clang (as provided by Apple in XCode 7.0.1) and GCC 5.2.0 do not have a
problem with the code. I'll see whether I can stomach moving the lines
outside the function they're in to pacify GCC 4.4.x, or removing the
pragmas altogether. Can you confirm that if, instead of removing the
directives altogether, you move the two before the 'printf' family function
call so that they are outside the function, and move the one line after the
'printf' family function so that it is after the function, then the code
compiles on GCC 4.4.x without a warning? Please reply direct to me rather
than to the mailing list; it is useful for people to know that there's a
problem and if necessary a workaround, but they don't need all the further
analysis and diagnostics, etc.

The functions are small enough that I'd be OK with doing that to make it
compile.

The pragma quells a semi-valid warning from compilers set exceptionally
extremely fussy about calling the 'printf' family functions with a format
string that is not a string literal but is computed or passed to the
function somehow. If you want to know how fussy compilers can be, get a
modern version of clang and use -Weverything as an option on some C code.
Don't be surprised when you get a lot of warnings; you will almost
inevitably get them even if you think you've been extremely careful with
your coding. (I don't think I've run all of SQLCMD through 'clang
-Weverything' yet.)

However, it also means it is in many ways cosmetic; you've certainly done
no harm by removing the pragma lines. Maybe I should treat those lines as
'maintainer-version only' and strip them from the distributed code

On Sun, Oct 18, 2015 at 5:55 PM, RAY BURNS <ray.burns@velocityglobal.co.nz>
wrote:

> I modified esnprinf.c (lines 29,30,32) and stderr.c (lines 361,362,364) and
> removed the #pragma directives and everything compiled ok.
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Jonathan Leffler <jonathan.leffler@gmail.com> #include <disclaimer.h>
Guardian of DBD::Informix - v2015.0826 - http://dbi.perl.org
"Blessed are we who can laugh at ourselves, for we shall never cease to be
amused."

--001a11c126e884b6770522714a2d

Messages In This Thread

  • Can't compile SQLCMD
    RAY BURNS -- Sunday, 18 October 2015, at 5:45 p.m.
    • Re: Can't compile SQLCMD
      RAY BURNS -- Sunday, 18 October 2015, at 8:55 p.m.
      • Re: Can't compile SQLCMD
        Jonathan Leffler -- Monday, 19 October 2015, at 4:54 a.m.

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