From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=) Subject: Re: Installing a C tool chain Date: Mon, 14 Apr 2014 23:32:02 +0200 Message-ID: <87eh0z1tt9.fsf@gnu.org> References: <871tzvu743.fsf@gnu.org> <20140126073815.GA19985@jocasta.intra> <20140126185413.GD9380@debian> <877g9mpmmd.fsf@gnu.org> <52E6213B.3020203@totakura.in> <87ha8pda3y.fsf_-_@gnu.org> <87wqhbz8wa.fsf@netris.org> <87ha671p6g.fsf@gnu.org> <20140414175414.GA21776@debian> <878ur73enk.fsf@gnu.org> <20140414194350.GA14893@debian> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:37674) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WZoU6-0005HO-Mw for guix-devel@gnu.org; Mon, 14 Apr 2014 17:32:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WZoU0-0001Yd-Ne for guix-devel@gnu.org; Mon, 14 Apr 2014 17:32:10 -0400 Received: from hera.aquilenet.fr ([2a01:474::1]:56842) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WZoU0-0001YX-Gl for guix-devel@gnu.org; Mon, 14 Apr 2014 17:32:04 -0400 In-Reply-To: <20140414194350.GA14893@debian> (Andreas Enge's message of "Mon, 14 Apr 2014 21:43:50 +0200") List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org To: Andreas Enge Cc: guix-devel@gnu.org Andreas Enge skribis: > On Mon, Apr 14, 2014 at 09:16:31PM +0200, Ludovic Court=C3=A8s wrote: >> This is because you=E2=80=99re compiling with -Wundef -Werror, something= that >> libc 2.19 headers apparently don=E2=80=99t support. > > I tried without both, and then it works. Do you have a source and suggest= ion > on what to do in such a case? All I know is that feature test macros have been cleaned up in 2.19, so perhaps it led to a change in behavior. > Is it deprecated to use -Werror with the autotoools? In general, using -Werror is very risky, because a slight change in a third-party header, or in compiler warnings, can cause the project to fail to build. In Guile building with -Werror is opt-in for this reason. Cheers, Ludo=E2=80=99.