From: Axel.Riese@risc.uni-linz.ac.at (Axel Riese)
Subject: How to avoid Warning: Redefinition of ...
18 Dec 1997 01:35:17 -0800
Message-ID: <199712180840.AA01499.cygnus.gnu-win32@melmac.risc.uni-linz.ac.at>
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To: gnu-win32@cygnus.com (GNU-Win32)

Dear cygwiners,

I managed to patch most of the headers from the latest Platform SDK to
make them useable for gcc (i.e., the preprocessor doesn't produce errors).

However, I came across the following problem: 

A lot of header files typedef some symbols more than once, thus producing
warnings like

 ... Warning: redefinition of blah_blah ...
 ... blah_blah previously defined in ...


Is there a way to avoid these warnings that is not contained in the following
list:

- adding for each typedef something like #define blah_blah_defined and
  checking #ifndef blah_blah_defined ... #endif 
- forgetting about the Microsoft headers
- closing my eyes during preprocessing and ignoring the warnings


Any suggestions appreciated,

    Axel


===========================================================================
Axel Riese
Research Institute for Symbolic Computation
J. Kepler University Linz
A-4040 Linz                          e-Mail: Axel.Riese@risc.uni-linz.ac.at
Austria             URL: http://www.risc.uni-linz.ac.at/people/ariese/home/
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