From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDAD3C433FE for ; Tue, 7 Sep 2021 14:56:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D57F7610C8 for ; Tue, 7 Sep 2021 14:56:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344856AbhIGO6F (ORCPT ); Tue, 7 Sep 2021 10:58:05 -0400 Received: from gate.crashing.org ([63.228.1.57]:41622 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344752AbhIGO6E (ORCPT ); Tue, 7 Sep 2021 10:58:04 -0400 Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 187Eqm0Y009137; Tue, 7 Sep 2021 09:52:48 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 187EqlAQ009134; Tue, 7 Sep 2021 09:52:47 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Tue, 7 Sep 2021 09:52:47 -0500 From: Segher Boessenkool To: Jakub Jelinek Cc: Linus Torvalds , Florian Weimer , Nathan Chancellor , Masahiro Yamada , Nick Desaulniers , Linux Kbuild mailing list , Linux Kernel Mailing List , clang-built-linux , llvm@lists.linux.dev, linux-toolchains@vger.kernel.org Subject: Re: [GIT PULL v2] Kbuild updates for v5.15-rc1 Message-ID: <20210907145247.GH1583@gate.crashing.org> References: <20210906154642.GV1583@gate.crashing.org> <20210906172701.GX1583@gate.crashing.org> <87lf49wodu.fsf@oldenburg.str.redhat.com> <20210906194808.GY1583@gate.crashing.org> <20210906201432.GZ920497@tucnak> <20210906215218.GA920497@tucnak> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210906215218.GA920497@tucnak> User-Agent: Mutt/1.4.2.3i Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org On Mon, Sep 06, 2021 at 11:52:18PM +0200, Jakub Jelinek wrote: > On Mon, Sep 06, 2021 at 02:08:58PM -0700, Linus Torvalds wrote: > There is a stddef.h include too and that's it > (I must say I don't see the reason for that include though). Yeah me neither. Maybe the header used NULL before? > Other compiler provided headers (not talking about C++ now) also have no > or very limited includes, including stddef.h, stdarg.h, stdatomic.h, etc. > The only exceptions are tgmath.h which isn't usable without libc > math.h/complex.h, is only for hosted environments. That requires a C library for GCC (we do not implement this stuff ourselves). The compiler and the C library have to work together to get this done, and the relation between GCC and Glibc has been a bit too tight for this, it is true. But a kernel build is not in a hosted environment. > in some cases stdint.h and limits.h which are in some > configurations provided both by the C library and the compiler and include > each other in that case (but e.g. stdint.h has an alternate version that > only uses compiler provided builtin macros) and openacc.h. On what targets is still problematic? And ? Segher