From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f65.google.com ([74.125.82.65]:53696 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750931AbeGJF1t (ORCPT ); Tue, 10 Jul 2018 01:27:49 -0400 Date: Tue, 10 Jul 2018 07:27:45 +0200 From: Ingo Molnar Subject: Re: [PATCH v2] objtool: move libelf detection to Kconfig from Makefile Message-ID: <20180710052745.GA16938@gmail.com> References: <1531186516-15764-1-git-send-email-yamada.masahiro@socionext.com> <20180710022904.e3oql2ts4qz43bzo@treble> <20180710042609.zie5fgrvoyusmeod@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180710042609.zie5fgrvoyusmeod@treble> Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: Josh Poimboeuf Cc: Masahiro Yamada , Ingo Molnar , Thomas Gleixner , X86 ML , Linus Torvalds , "H. Peter Anvin" , Linux Kbuild mailing list , Linux Kernel Mailing List , Michal Marek * Josh Poimboeuf wrote: > Since we switched the x86_64 default to the ORC unwinder, a lot of > people have switched over. But this patch will reverse (or at least > slow down) that trend, because almost nobody has the libelf devel > packaged installed by default. So over time, it will effectively make > frame pointers the default again in many cases. That's exactly what we > *don't* want to do. It will also cause people to accidentally re-enable > frame pointers when they thought they had ORC. Yeah, agreed - turning ORC off like that is a non-starter. Thanks, Ingo