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Message-ID: <20111110193309.GA23992@openwall.com>
Date: Thu, 10 Nov 2011 23:33:09 +0400
From: Solar Designer <solar@...nwall.com>
To: owl-dev@...ts.openwall.com
Subject: Re: %optflags for new gcc
Dmitry, all -
On Mon, Nov 07, 2011 at 12:29:04AM +0400, Solar Designer wrote:
> I guess -D_FORTIFY_SOURCE=2 and -fstack-protector would cause issues
> when building kernel modules. Did ALT Linux receive (m)any problem
> reports from users trying to build additional kernel modules, such as
> hardware vendors'? How do you recommend we deal with this?
-fstack-protector is only enabled by default when -nostdlib is not
specified. Perhaps this is what helps with kernel module builds, which
do specify -nostdlib (or at least are supposed to). As to
-D_FORTIFY_SOURCE=2, it just should not matter when glibc's header files
are not included.
So I guess kernel module builds do work despite of these new defaults.
Alexander
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