Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753785Ab3JJGgJ (ORCPT ); Thu, 10 Oct 2013 02:36:09 -0400 Received: from mail-ee0-f50.google.com ([74.125.83.50]:55740 "EHLO mail-ee0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751949Ab3JJGgI (ORCPT ); Thu, 10 Oct 2013 02:36:08 -0400 Date: Thu, 10 Oct 2013 08:36:03 +0200 From: Ingo Molnar To: Namhyung Kim Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Arnaldo Carvalho de Melo , David Ahern , Jiri Olsa Subject: Re: [PATCH 48/52] tools/perf/build: Exclude MAKEFLAGS from nested invocation Message-ID: <20131010063603.GA10159@gmail.com> References: <1381227082-22039-1-git-send-email-mingo@kernel.org> <1381227082-22039-49-git-send-email-mingo@kernel.org> <87k3hliqx1.fsf@sejong.aot.lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87k3hliqx1.fsf@sejong.aot.lge.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1229 Lines: 35 * Namhyung Kim wrote: > On Tue, 8 Oct 2013 12:11:18 +0200, Ingo Molnar wrote: > > In case the user specifies MAKEFLAGS as an environment variable, > > or uses 'make -jN' explicitly, the options can conflict and result in: > > > > BUILD: Doing 'make -j8' parallel build > > make[1]: warning: -jN forced in submake: disabling jobserver mode. > > GEN common-cmds.h > > make[1]: *** write jobserver: Bad file descriptor. Stop. > > > > Make sure we invoke the main makefile in a pristine state. > > > > Users who want to do something non-standard can use the: > > > > make -f Makefile.perf > > > > method to invoke the makefile. > > Hmm... it'd be great if there's a way to detect -jN option and convert > it to the JOBS. I looked hard but couldn't find any solution for that, GNU Make hides it. It seems to be possible on other Make platforms - so I suspect that will have to be a feature request to the GNU Make folks ... Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/