GNU bug report logs - #766
23.0.60; interesting warning during compilation

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Peter Dyballa <Peter_Dyballa <at> Freenet.DE>, 766 <at> debbugs.gnu.org
Cc: bug-gnu-emacs <at> gnu.org
Subject: bug#766: 23.0.60; interesting warning during compilation
Date: Sat, 23 Aug 2008 17:10:50 +0300

> From: Peter Dyballa <Peter_Dyballa <at> Freenet.DE>
> Date: Sat, 23 Aug 2008 11:00:28 +0200
> Cc: 
> 
> The warning from gcc 4.0.1 is:
> 
> 	dired.c:1003: warning: right shift count >= width of type
> 
>        /* To allow inode numbers beyond 32 bits, separate into 2 24-bit
> 	 high parts and a 16-bit bottom part.  */
>        EMACS_INT high_ino = s.st_ino >> 32;
>        EMACS_INT low_ino  = s.st_ino & 0xffffffff;

This happens on any system whose st_ino is 32 bits or less, because
this code needs to cater to systems whose st_ino is wider than 32
bits.

If someone has suggestions how to avoid this warning without making
code ugly and unreadable, and preferably without system-dependent
#ifdef's, I'm all ears.

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