Re: [Mingw-users] Error: redefinition of typedef

[padam c. <pad...@ya...>]

Hi Greg

thanks for your suggestions, i tried to compile it on Comeau and got this message:

Your Comeau C/C++ test results are as follows:
Comeau C/C++ 4.3.9 (Mar 27 2007 17:24:47) for ONLINE_EVALUATION_BETA2
Copyright 1988-2007 Comeau Computing.  All rights reserved.
MODE:non-strict warnings C99 noC++0x_extensions

"ComeauTest.c", line 6: warning: typedef name has already been declared (with same
          type)
  }MyStruct;
   ^

-Padam


In non-strict mode,
with -tused,
Compile succeeded (but remember, the Comeau online compiler does not link).

Compiled with C++0x extensions DISabled.


--- On Wed, 30/9/09, Greg Chicares <gch...@sb...> wrote:

From: Greg Chicares <gch...@sb...>
Subject: Re: [Mingw-users] Error: redefinition of typedef
To: "MinGW Users List" <min...@li...>
Date: Wednesday, 30 September, 2009, 3:35 PM

On 2009-09-30 05:29Z, padam chamoli wrote:
> 
> I am getting this error: 
>   test.c:6: error: redefinition of typedef 'MyStruct' 
>   test.c:3: error: previous declaration of 'MyStruct' was here 

You can't redefine a typedef in standard C. See, for example:

http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/bfe0c8d9d631afd9/b786d09be50faa17

http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/73d1249c78f99dd3/a409a5a5c0be0d84

> I am able to succesfully compile the same using Win32 and RVCT22 compilers. 

If you want a reputable second opinion, paste your code here:
  http://www.comeaucomputing.com/tryitout

Some compilers may allow typedef redefinition as an extension.
But code that relies on such an extension is not portable.

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