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Date: Wed, 08 Aug 2007 13:16:00 -0000
From: Gabriel Dos Reis <gdr@cs.tamu.edu>
To: "Kaveh R. GHAZI" <ghazi@caip.rutgers.edu>
cc: =?ISO-8859-1?Q?Manuel_L=F3pez-Ib=E1=F1ez?= <lopezibanez@gmail.com>,      Mark Mitchell <mark@codesourcery.com>,      Richard Guenther <richard.guenther@gmail.com>, gcc-patches@gcc.gnu.org
Subject: Re: Add a __nowarn__ keyword
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On Wed, 8 Aug 2007, Kaveh R. GHAZI wrote:

| On Wed, 8 Aug 2007, Gabriel Dos Reis wrote:
| 
| > | I am not sure whether this is a good idea since we already have the
| > | #pragma GCC diagnostics. But yes, the pragma does not work (yet) at
| > | the statement level.
| >
| > If I understand DJ correctly, they worked at the function definition level;
| > that is all we need.  Kaveh, did that not work?
| > -- Gaby
| 
| I tried using the #pragma on an inline CONST_CAST function, it did not
| work for -Wcast-qual warnings.  I didn't bother trying to see if it worked
| for any others.
| 
| #pragma GCC diagnostic ignored "-Wcast-qual"
| extern __inline void *CONST_CAST(const void *cv)
| {
|   return (void *)cv;
| }
| 
| % gcc foo.c -Wcast-qual -c
| nw.c: In function 'CONST_CAST':
| nw.c:4: warning: cast discards qualifiers from pointer target type

I believe you have discovered a bug in the compiler :-)

-- Gaby