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Date: Thu, 1 Aug 2013 16:02:28 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: building Perl module DBD-ODBC-4.3 under 64-bit cygwin
Message-ID: <20130801140228.GQ4166@calimero.vinschen.de>
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References: <3BA6644C396CE44F83F988D688C72A73015956B7EE AT NL0230MBX08N1 DOT DIR DOT slb DOT com>
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User-Agent: Mutt/1.5.21 (2010-09-15)

On Aug  1 12:57, Simon Barnes wrote:
> I'm having difficulty with this and would appreciate any suggestions.   It does build under 32-bit cygwin.

That's a good place to point to my extended "how to port to 64 bit" FAQ,
starting here:

  http://cygwin.com/faq/faq.html#faq.programming.64bitporting

Please read this first.

Basically, what you see here...

> /usr/local/include/sqltypes.h:261:33: error: conflicting types for 'ULONG'
>  typedef unsigned long           ULONG;
>                                  ^
> In file included from /usr/include/w32api/windows.h:69:0,
>                  from dbdodbc.h:6,
>                  from ODBC.h:8,
>                  from ODBC.xs:1:
> /usr/include/w32api/windef.h:25:27: note: previous declaration of 'ULONG' was here
>  typedef unsigned __LONG32 ULONG;
>                            ^
> Makefile:390: recipe for target `ODBC.o' failed

...is a typical type conflict.  ULONG is a Windows type defined as
unsigned long in the Win32 API.  The Win32 data model is LLP64, so
unsigned long is 4 bytes.  However, Cygwin is LP64, so unsigned long is
8 bytes.  Therefore the `typedef unsigned long ULONG;' is wrong for 64
bit.  Either drop the definition entirely, or redefine it matching the
data model:

  #ifdef __LP64__
  typedef unsigned int ULONG;
  #else
  typedef unsigned long ULONG;
  #endif

HTH,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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