From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp1 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id oZDIOv95a1/mIgAA0tVLHw (envelope-from ) for ; Wed, 23 Sep 2020 16:38:23 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp1 with LMTPS id MCmTNv95a1+VdQAAbx9fmQ (envelope-from ) for ; Wed, 23 Sep 2020 16:38:23 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 893CD9402A0 for ; Wed, 23 Sep 2020 16:38:23 +0000 (UTC) Received: from localhost ([::1]:60364 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kL7mg-0000yC-HY for larch@yhetil.org; Wed, 23 Sep 2020 12:38:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55604) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kL7mM-0000wA-J9 for bug-guix@gnu.org; Wed, 23 Sep 2020 12:38:02 -0400 Received: from debbugs.gnu.org ([209.51.188.43]:54334) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kL7mM-000344-AF for bug-guix@gnu.org; Wed, 23 Sep 2020 12:38:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kL7mM-000246-6t for bug-guix@gnu.org; Wed, 23 Sep 2020 12:38:02 -0400 X-Loop: help-debbugs@gnu.org Subject: bug#43579: g++ does not provide std::fegetround Resent-From: Andreas Enge Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Wed, 23 Sep 2020 16:38:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 43579 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: 43579@debbugs.gnu.org Received: via spool by 43579-submit@debbugs.gnu.org id=B43579.16008790377837 (code B ref 43579); Wed, 23 Sep 2020 16:38:02 +0000 Received: (at 43579) by debbugs.gnu.org; 23 Sep 2020 16:37:17 +0000 Received: from localhost ([127.0.0.1]:37644 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kL7ld-00022L-Ho for submit@debbugs.gnu.org; Wed, 23 Sep 2020 12:37:17 -0400 Received: from hera.aquilenet.fr ([185.233.100.1]:37220) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kL7lb-000227-Da for 43579@debbugs.gnu.org; Wed, 23 Sep 2020 12:37:16 -0400 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id 0634AC10; Wed, 23 Sep 2020 18:37:12 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at aquilenet.fr Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ksPPU3cMY3q6; Wed, 23 Sep 2020 18:37:12 +0200 (CEST) Received: from jurong (unknown [IPv6:2001:910:103f::f06]) by hera.aquilenet.fr (Postfix) with ESMTPSA id EC4B05BE; Wed, 23 Sep 2020 18:37:11 +0200 (CEST) Date: Wed, 23 Sep 2020 18:36:32 +0200 From: Andreas Enge Message-ID: <20200923163632.GA7348@jurong> References: <20200923162121.GA28654@jurong> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200923162121.GA28654@jurong> X-Spam-Score: 0.7 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-Spam-Score: -0.3 (/) X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: "bug-Guix" X-Scanner: scn0 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Spam-Score: -0.51 X-TUID: ZK/oMT0XnKGV On Wed, Sep 23, 2020 at 06:21:21PM +0200, Andreas Enge wrote: > Now it would be interesting to have a look at config.log for gcc... I did so with gcc-10.2.0 and executed ./configure in the subdirectory libstdc++-v3. The relevant part of config.log is this: configure:16462: checking for ISO C99 support to TR1 in configure:16490: g++ -c -std=c++98 conftest.cpp >&5 configure:16490: $? = 0 configure:16497: result: yes This is when trying to compile gcc-10.2.0 with gcc-10.2.0; so somehow our bootstrapping process does something differently when creating the final user facing gcc. Andreas