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Subject: Re: using memset in a module
From: Shaya Potter <spotter@cs.columbia.edu>
To: Dan Aloni <da-x@gmx.net>
Cc: "Randy.Dunlap" <rddunlap@osdl.org>, linux-kernel@vger.kernel.org
In-Reply-To: <20020927152033.GA4710@callisto.yi.org>
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the problem was I was trying to use some gcc specific behavior.

i.e.

char devpts[15] = "/dev/pts";

under 2.95 since memset isn't a builtin there has to be a reference to
it, while under 2.96/3.2 there is a builtin, so there's no symbol
needed.

On Fri, 2002-09-27 at 11:20, Dan Aloni wrote:
> On Thu, Sep 26, 2002 at 07:02:26PM -0400, Shaya Potter wrote:
> > On Thu, 2002-09-26 at 18:51, Randy.Dunlap wrote:
> > > On 26 Sep 2002, Shaya Potter wrote:
> > > 
> > > | I have a problem using memset in a module.
> > > |
> [snio]
> > > What gcc options are you using?
> > > You need -O2 at least.
> > >           ^ upper-case letter O
> > 
> > 
> > yes, using it.
> > 
> > gcc -Wall -DMODULE -DMODVERSIONS -D__KERNEL__ -DLINUX -DEXPORT_SYMTAB
> > -I/usr/src/linux/include/ -I`pwd`/../migration
> > -I`pwd`/..//virtualization -O2 -fomit-frame-pointer -pipe
> > -fno-strength-reduce -malign-loops=2 -malign-jumps=2 -malign-functions=2
> > -o fs1.o -c virtualizers/fs1.c
> 
> Try adding -nostdinc. Prehaps memset is picked up as 'extern' somehow.
> If that doesn't work, compile with -E instead of -c and grep the
> preprocessing output for memset, that may give a clue.
> 
> -- 
> Dan Aloni
> da-x@gmx.net
> -
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