Re: [PATCH] removal of "static foo = 0"

[Andreas Schwab <schwab@suse.de>]

Andrea Arcangeli <andrea@suse.de> writes:

|> On Tue, Nov 28, 2000 at 10:55:06AM +0100, Andreas Schwab wrote:
|> > Alexander Viro <viro@math.psu.edu> writes:
|> > 
|> > |> On Tue, 28 Nov 2000, Andrea Arcangeli wrote:
|> > |> 
|> > |> > On Tue, Nov 28, 2000 at 12:10:33PM +0900, kumon@flab.fujitsu.co.jp wrote:
|> > |> > > If you have two files:
|> > |> > > test1.c:
|> > |> > > int a,b,c;
|> > |> > > 
|> > |> > > test2.c:
|> > |> > > int a,c;
|> > |> > > 
|> > |> > > Which is _stronger_?
|> > |> > 
|> > |> > Those won't link together as they aren't declared static.
|> > |> 
|> > |> Try it. They _will_ link together.
|> > 
|> > Not if you compile with -fno-common, which should actually be the default
|> > some day, IMHO.
|> 
|> I thought -fno-common was the default behaviour indeed, and I agree it should
|> become the default since current behaviour can lead to sublte bugs. (better I
|> discovered this gcc "extension" this way than after some day of debugging :)

This is not really a gcc extension, but long Unix tradition.  If you make
-fno-common the default then many programs will not build any more,
including the Linux kernel. :-)

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/