From:	"Tim Nicholson" <T DOT J DOT Nicholson AT btinternet DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	posible bug in GCC syntax checker?
Date:	Thu, 11 Oct 2001 19:13:02 +0100
Organization:	Skyforce avionics Limited
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

I think I have found a bug in the GCC syntax checker! When I compile the
following code, I get the message...

Warning: Passing arg 1 of draw_item from incompatible pointer type

------------- source code ---------
//Local function prototype
void draw_item(const int point_array[ ][2]);

//function main
int main(void)
{
int item[5][2];

   {some code to initialise item};
   draw_item(item);

   return;
}

//function draw_item
void draw_item(const int point_array[ ][2])
{
    {some code to draw a point_array};
}

----------- end of code --------

This seemed very strange so I tried changing the prototype to see if I could
understand what was happening. Eventually, I discovered that I no longer got
the warning when I defined the prototype as:

void draw_item(int (* const point_array) [2]);

Now, correct me if I am wrong, but is this not the same thing in practical
terms?

I do not understand why the compiler complains about the first definition.
Is it a GCC bug? I am using DJGPP GCC-2.95.2 : GNU C compiler binaries with
no compiler flags.


Thanks


Tim

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