Re: [PATCH] a more efficient BUG() macro

J . A . Magallon (
Sun, 18 Feb 2001 01:33:53 +0100

On 02.18 Keith Owens wrote:
> __C_FILE__ and __C_LINE__ refer to the .c or .s file that included the
> header, so you get the exact location of the failing code instead of
> the name and line number of a common header which is used all over the
> place. __C_FILE__ would be replaced with the minimum string required

Are you sure about that ?
Try this:
#define hello printf("%d at %s\n",__LINE__,__FILE__)

#include <stdio.h>
#include "a.h"

int main()
return 0;

werewolf:~/ko> gcc a.c -o a
werewolf:~/ko> a
6 at a.c
7 at a.c

(line changes, and name is .c)
because __FILE__ and __LINE__ are expanded with respect to the current
SOURCE file (see info cpp), not header file.

As I said before, my choose would be the __func__ + __LINE__ predefined macros.
I would prefer to see 'bug in my_buggy_device_init(), line 42'. And you can
even drop the __LINE__ part.

J.A. Magallon                                                      $> cd pub                                          $> more beer

Linux werewolf 2.4.1-ac17 #1 SMP Sat Feb 17 01:47:56 CET 2001 i686

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